Checklist of Ventura County Rare Plants[1]

By David L. Magney

California Native Plant Society, Channel Islands Chapter

Updated 21 May 2008

Ventura County is located in southern California, USA, along the east edge of the Pacific Ocean.  The coastal portion occurs along the south and southwestern quarter of the County.  Ventura County is bounded by Santa Barbara County on the west, Kern County on the north, Los Angeles County on the east, and the Pacific Ocean generally on the south (Figure 1, General Location Map of Ventura County).

Ventura County extends north to 34.9014ºN latitude at the northwest corner of the County.  The County extends westward at Rincon Creek to 119.47991ºW longitude, and eastward to 118.63233ºW longitude at the west end of the San Fernando Valley just north of Chatsworth Reservoir.  The mainland portion of the County reaches southward to 34.04567ºN latitude between Solromar and Sequit Point west of Malibu.  When including Anacapa and San Nicolas Islands, the southernmost extent of the County occurs at 33.21ºN latitude and the westernmost extent at 119.58ºW longitude, on the south side and west sides of San Nicolas Island, respectively.

Ventura County occupies 480,996 hectares [ha] (1,188,562 acres [ac]) or 4,810 square kilometers [sq. km] (1,857 sq. miles [mi]), which includes Anacapa and San Nicolas Islands.  The mainland portion of the county is 474,852 ha (1,173,380 ac), or 4,748 sq. km (1,833 sq. mi.) in area and ranges in elevation from sea level on the southwest to 2,692 meters [m] (8,831 feet [ft.]) above sea level at its northern border on Mount Piños (Figure 2, Shade Relief Map of Mainland Ventura County).  There appears to be some discrepancy in the actual area covered by Ventura County, depending on the source.  For example, according to the California County Fact Book, 1983 edition (California Supervisors Association of California 1983), Ventura County occupies an area of 482,668 ha (1,192,680 ac) or 2,999 sq. km (1,863.6 sq. mi), with 3,254 ha (8,040 ac) or 20.3 sq. km (12.6 sq. mi) of that as water.  The discrepancy appears to be a little over 2,469 ha (6,100 ac), which does not correspond to the area occupied by the two islands within the County.  However, thhe difference does appears to match the area occupied by a rectangular portion of the county in the northeast corner, where the Ventura County Board of Supervisors voted to give away approximately 6,100 acres to Kern County to accommodate a proposed development that Ventura County felt it could not provide adequate County services to.

Mainland Ventura County is located between 34º00' and 35º00'N latitude and 118º38' and 119º28'W longitude, excluding Anacapa and San Nicolas Islands, and is generally longer than wide.  Anacapa Islands are the smallest and easternmost of the northern Channel Islands while San Nicolas Island is an outer southern Channel Island.

Figure 1.  General Location Map of Ventura County

Figure 2.  Shade Relief Map of Mainland Ventura County

The flora of Ventura County is comprised of approximately 2,321 native and naturalized vascular plant taxa, including those expected to occur but for which no vouchers are known (214 taxa).  A total of 2,111 taxa (91.0%) are known to occur in the county that are supported by voucher specimens, or have been observed by the author.  Approximately 1,833 taxa (78.9%) of the flora are native, and another 488 (21.0%) taxa are not native (based on a flora of 2,321 taxa).  A small percentage (8.0%) of the flora taxa (186 taxa) are quite common (dominant or common), on a scale ranging from dominant to rare (dominant, common, occasional, scattered, uncommon, and rare).  Many more of the plant taxa in Ventura County are uncommon to quite rare. 

All the species (including varieties and subspecies, which are lower taxonomic units than full species) of native and naturalized plants are important components of the biodiversity of life in Ventura County.  While most species do not recognize political boundaries, such as county boundaries, our government agencies set policies and manage land use and resources based on such jurisdictional boundaries. 

This list represents a compilation of known records and observations (many by the author) of all native vascular plant species: 

·        With ten (10) or fewer populations within Ventura County;

·        Listed by CNPS on a statewide basis (CNPS 2001);

·        Listed by the US Fish and Wildlife Service as Threatened or Endangered under the federal Endangered Species Act;

·        Listed by the California Fish and Game Commission as Rare, Threatened, or Endangered;

·        Are at the limits of their distribution range (southernmost, northernmost, westernmost extent); or

·        The Type Locality occurs within the County (then only the Type Locality is considered sensitive). 

Some taxa are considered rare or uncommon throughout California, as established by the California Native Plant Society (CNPS) in it’s Inventory of Rare and Endangered Plants of California, sixth edition[2], even though more than ten populations are known from Ventura County, including Anacapa Islands and San Nicolas Island.  Currently there are 1,203 taxa (51.8% of the county flora) included on this list of locally rare plants (including taxa rare statewide), which include taxa on the mainland and two islands (Anacapa and San Nicolas).  Another 164 (7.1%) were appended that are likely to occur in the County but for which no voucher specimens or reliable locality data are available.  These are included at the end of this list.  Many of these potential additions are known to occur in adjacent counties and expected to occur in Ventura County.  A total of 62 plants (2.7%) considered rare in Ventura County occur only on the Channel Islands (Anacapa and San Nicolas Islands) portion of the county.  A number of taxa were deleted from this list when over ten occurrences were known to occur in Ventura County. 

This list was compiled as the results of extensive research of the flora of Ventura County.  It is based on extensive field searches; examination of specimens collected by others housed at public herbaria; and published reports.  The author began research on the Ventura County flora in the late 1970s.

Soon to be published separately, Ventura County Rare Plants will provide much more information about those plants included in this checklist, including:  a brief description of the plant, habitat preferences, associated plant communities, elevation range, and blooming period.  That publication will include additional information for each taxon, including complete scientific name, known synonyms, common name(s), habit and size, rarity status, months it is in bloom or identifiable, and general and specific locality data, with supporting voucher collection information.  Each specimen cited for a specific location includes the name of the collector, the collection number (or collection date if no number was assigned), and the herbarium in which it is stored (some duplicate specimens have been deposited in more than one herbarium).  Location information is provided at two levels:  a general geographic area, and then specific locations. 

This list should be considered the best available information at the time of publication, as our knowledge of the Ventura County flora is dynamic, and growing with each botanical survey or foray.  This checklist will be updated periodically and revised according to all new verifiable information provided.  Occurrences of vascular plants found in Ventura County that add to or could change the status of any plant listed here should be submitted to the author via CNPS (attention: David Magney) or via email to david(at)magney(dot)org.  Any lists submitted must be supported by voucher specimens that are deposited in a public herbarium, according to CNPS and California Botanical Society policies based on Ferren et al. (1995[3]).

Plants not included in CNPS’s Inventory, or listed by federal and state agencies, that have more than ten populations in Ventura County will be dropped from this list, except for those plants:

·        representing range limits, such as the westernmost limit of the taxons range; or

·        the “Type Locality” sites (“Type Locality” sites are the sites from which the plant was originally collected and formally described from, and is represented by a “Type Specimen”, for which a note occurs after the herbarium at which it is deposited as “Holotype” or “Isotype”). 

For those plants that are otherwise relatively common in Ventura County, only the populations that represent the limit of a plants range should be considered of concern (as sensitive), with the remaining population(s) noted to provide perspective, but not considered sensitive/rare for the purposes of this checklist.  Artemisia tridentata var. tridentata is an example of this, where it should be considered of local concern when it occurs in the western portion of the Santa Clara River Valley (the limit of its range) while the populations in the Upper Sespe Creek watershed and the northern part of the county are not of concern from a rarity perspective.

Special-status species are plants that are either listed as endangered or threatened under the Federal or California Endangered Special Acts; or considered to be rare under the California Native Plant Protection Act; or considered to be rare (but not formally listed) by resource agencies, professional organizations (e.g. California Native Plant Society), and the scientific community.  For the purposes of this checklist, special-status species are further defined in Table 1, Definitions of Special-Status Plant Species.

Listed species are those taxa that are formally listed as endangered or threatened by the federal government (e.g. U.S. Fish and Wildlife Service [USFWS]) pursuant to the national Endangered Species Act or as endangered, threatened, or rare (for plants only) by the State of California (i.e. California Fish and Game Commission) pursuant to the California Endangered Species Act or the California Native Plant Protection Act.

The CNDDB Element Ranking system provides a numeric global and state ranking system for all special-status plant and wildlife species and rare habitats tracked by the CNDDB.  The global rank (G-rank) is a reflection of the overall condition of an element (species or natural community) throughout its global range.  The state ranking (S-rank) is assigned much the same way as the global rank, except state ranks in California often also contain a threat designation attached to the S-rank.  This Element Ranking system is defined below in Table 2, Natural Diversity Data Base Element Ranking System.  Not all special-status species considered in this checklist are tracked by the CNDDB, nor have global or state rarity ranking been given to them; therefore, the author has applied the rules described above to “rank” those special-status species lacking such ranking.  Taxa for which Global and State rarity ranking have been devised here are followed by a “?” in parentheses, denoting tentative assignment. 

Table 1.  Definitions of Special-Status Plant Species

1.   Plants  legally protected under the California and Federal Endangered Species Acts or under other regulations.

2.   Plants considered sufficiently rare by the scientific community to qualify for such listing; or

3.   Plants considered to be sensitive because they are unique, declining regionally or locally, or are at the extent of their natural range.

Special-Status Plant Species

¨        Plants listed or proposed for listing as threatened or endangered under the Federal Endangered Species Act (50 CFR 17.12 for listed plants and various notices in the Federal Register for proposed species).

¨        Plants that are Category 1 or 2 (species of special concern) candidates for possible future listing as threatened or endangered under the Federal Endangered Species Act (55 CFR 6184, February 21, 1990).

¨        Plants that meet the definitions of rare or endangered species under the CEQA (State CEQA Guidelines, Section 15380).

¨        Plants considered by the CNPS to be "rare, threatened, or endangered" in California (Lists 1A, 1B, and 2 in CNPS [2001][4]).

¨        Plants listed by CNPS as plants about which we need more information and plants of limited distribution (Lists 3 and 4 in CNPS [2001]).

¨        Plants listed or proposed for listing by the State of California as threatened or endangered under the California Endangered Species Act (14 CCR 670.5).

¨        Plants listed under the California Native Plant Protection Act (California Fish and Game Code 1900 et seq.).

¨        Plants considered sensitive by other federal agencies (i.e. U.S. Forest Service, Bureau of Land Management) or state and local agencies or jurisdictions. 

¨        Plants considered sensitive or unique by the scientific community or occurring at the limits of its natural range (State CEQA Guidelines, Appendix G).

 

CNPS’s Inventory of Rare and Endangered Plants of California[5] categorizes rare California plants into one of five lists (1A, 1B, 2, 3, & 4) representing the five levels of species status, one of which is assigned to a sensitive species to indicate its status of rarity or endangerment and distribution.  A CNPS List is a more general designation than the three separate sets of information provided in a CNPS R-E-D Code (see the CNPS Inventory for definitions).  However, the CNPS List is a significant designation in terms of a species’ overall status throughout all of California, and it works well in conjunction to the specifications of the R-E-D Code.  The CNPS R-E-D Code is a three-numbered numeric ranking, which is assigned to a special-status species, consisting of one number (1, 2, or 3) for each of the three categories (Rarity-Endangerment-Distribution).  Each number accurately describes the species’ population levels and distribution patterns within each category. 

As described for the NDDB ranking, not all special-status species (most) considered in this checklist are tracked by CNPS, nor have R-E-D codes been given to them; however, the author has applied the rules described above to “rank” those special-status species lacking such ranking to either “rare” or “uncommon”; however, these rankings are not included in the checklist.  Rather the occurrence rankings for each are provided in the Ventura County Rare Plants and in the Flora of Ventura County to be published in 2006 by the author.

The large number of taxa on this list is the result of several factors:

1.      Development in Ventura County has eliminated a majority of the natural vegetation in the southern half of the County, eliminating many occurrences of native plant species;

2.      A number of taxa found nowhere else are present in Ventura County, local endemics, and several of these are listed as threatened or endangered by either the California Department of Fish and Game or the U.S. Fish and Wildlife Service;

3.      Ventura County is geographically situated such that floral influences from the north, south, and east enter the County at its edges (limits of some species’ ranges);

4.      Anacapa and San Nicolas Islands support many species found only on the California Channel Islands, including island endemics;

5.      Ventura County is topographically and climatically diverse, providing numerous habitats for uncommon and rare species; and

6.      Botanical surveys have not been conducted systematically everywhere in the County.  In other words, the flora of Ventura County is not fully understood or documented, and additional populations of a number of the plants listed below likely occur in the County, we just aren’t aware of them yet.  Regardless, significant collecting has occurred in the County over the last 150 years, and the author has a reasonably good understanding of the flora.

This list was compiled according to definitions under the California Environmental Quality Act (CEQA) under Initial Study Checklist Section 6, Subsections A and E.  Projects reviewed under CEQA should consider impacts to one or more of the species included in this checklist as potentially significant.  Generally, if a project would impact a population of one or more of the plants listed herein, that/those impact(s) should be considered significant unless substantial evidence is provided that may support an alternate conclusion. 

What significance does a list of locally rare species have under CEQA?

The following answer is provided by John Buse, Esq., of the Environmental Defense Center of Ventura, California[6].  The CEQA Guidelines provide that a lead agency shall find that a project may have a significant effect on the environment if the project “… has the potential to … reduce the number or restrict the range of an endangered, rare or threatened species …”.  Guidelines §15065(a).  In addition, the CEQA Guidelines Appendix G Environmental Checklist Form considers whether a project would “have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations …”.

According to the CEQA Guidelines, a species is considered “rare” when either:

(A)    Although not presently threatened with extinction, the species is existing in such small numbers throughout all or a significant portion of its range that it may become endangered if its environment worsens; or

(B)     The species is likely to become endangered within the foreseeable future throughout all or a significant portion of its range and may be considered “threatened” as that term is used in the Federal Endangered Species Act.  Guidelines §15380(b)(2).

 

Table 2.  Natural Diversity Database Element Ranking System


Global Ranking (G)

G1

Less than 6 viable element occurrences (populations for species) OR less than 1,000 individuals OR less than 809.4 hectares (ha) (2,000 acres [ac]).

G2

6 to 20 element occurrences OR 809.4 to 4,047 ha (2,000 to 10,000 ac).

G3

21 to 100 element occurrences OR 3,000 to 10,000 individuals OR 4,047 to 20,235 ha (10,000 to 50,000 ac).

G4

Apparently secure; this rank is clearly lower than G3 but factors exist to cause some concern (i.e. there is some threat, or somewhat narrow habitat).

G5

Population or stand demonstrably secure to ineradicable due to being commonly found in the world.

GH

All sites are historic; the element has not been seen for at least 20 years, but suitable habitat still exists.

GX

All sites are extirpated; this element is extinct in the wild.

GXC

Extinct in the wild; exists in cultivation.

G1Q

The element is very rare, but there is a taxonomic question associated with it.

Subspecies Level

Subspecies receive a T-rank attached to the G-rank.  With the subspecies, the G-rank reflects the condition of the entire species, whereas the T-rank reflects the global situation of just the subspecies or variety.
For example:  Chorizanthe robusta var. hartwegii.  This plant is ranked G2T1.  The G-rank refers to the whole species range (i.e. Chorizanthe robusta, whereas the T-rank refers only to the global condition of var. hartwegii.

State Ranking (S)

S1

Less than 6 element occurrences OR less than 1,000 individuals OR less than 809.4 ha (2,000 ac).

          S1.1 = very threatened
          S1.2 = threatened
          S1.3 = no current threats known

S2

6 to 20 element occurrences OR 3,000 individuals OR 809.4 to 4,047 ha (2,000 to 10,000 ac).

          S2.1 = very threatened
          S2.2 = threatened
          S2.3 = no current threats known..

S3

21 to 100 element occurrences OR 3,000 to 10,000 individuals OR 4,047 to 20,235 ha (10,000 to 50,000 ac).

          S3.1 = very threatened
          S3.2 = threatened
          S3.3 = no current threats known

S4

Apparently secure within California; this rank is clearly lower than S3 but factors exist to cause some concern (i.e. there is some threat, or somewhat narrow habitat).  NO THREAT RANK.

S5

Demonstrably secure to ineradicable in California.  NO THREAT RANK.

SH

All California sites are historic; the element has not been seen for at least 20 years, but suitable habitat still exists.

SX

All California sites are extirpated; this element is extinct in the wild.

Notes:  1.  Other considerations used when ranking a species or natural community include the pattern of distribution of the element on the landscape, fragmentation of the population/stands, and historical extent as compared to its modern range.  It is important to take a bird’s eye or aerial view when ranking sensitive elements rather than simply counting element occurrences.

2.       Uncertainty about the rank of an element is expressed in two major ways: by expressing the rank as a range of values (e.g., S2S3 means the rank is somewhere between S2 and S3), and by adding a ? to the rank (e.g. S2?).  This represents more certainty than S2S3, but less than S2.  (CNDDB 2002.)

Species already listed under the California or federal ESA shall be presumed to be endangered, rare, or threatened.  Guidelines §15380(c).  A species not currently listed shall nevertheless be considered to be endangered, threatened, or rare if it meets the criteria in the CEQA definitions of “endangered” or “rare”.  The term “sensitive” species, which appears in the Appendix G checklist, is not defined in CEQA.

If a species is considered locally rare due to its limited occurrence within a political boundary, such as the County of Ventura, and if the species’ local population constitutes a significant portion of its range, the species must be considered a rare species under CEQA.  The mere placement of a species on a list of locally rare species is probably not enough to meet the CEQA criteria for endangered, threatened, or rare species.  However, if the list contains some additional explanation indicating why the species meets the CEQA criteria, such as the fact that the local population constitutes a significant portion of the species’ range, the list should provide substantial evidence of rarity. 

If the CEQA criteria are satisfied, it is irrelevant that a species is relatively common in other locations.  For example, the Pacific Coast populations of the Snowy Plover are listed as threatened under the federal ESA, despite the fact that inland populations are relatively common and are not protected.  The existence of the non-listed populations does not diminish the Snowy Plover’s status as a endangered, threatened, or rare species under CEQA.  By extension, if the Pacific Coast populations of the Snowy Plover were not listed as threatened, these populations would still be considered endangered, threatened, or rare under CEQA.  Accordingly, the special status for Snowy Plover in Ventura County under CEQA would still apply even if Snowy Plover was relatively common in, for example, Mono County.  Assertions implying that a species necessarily does not warrant inclusion on a list of locally rare species if it is common elsewhere in California simply because it occurs rarely in Ventura County within a political boundary are incorrect.  As the Snowy Plover example indicates, there will be instances when a locally rare species must be considered rare under CEQA despite the species’ common occurrence elsewhere in California. 

Snowy Plover on the Pacific Coast is protected under the federal ESA based on the concept of a “distinct population segment” (DPS).  Something similar to the DPS concept could be used to determine whether a locally rare species is, in fact, endangered, threatened, or rare under CEQA.  The federal ESA allows a DPS, defined according to geographic or reproductive isolation, to be treated as a “species”.  Therefore, as in the Snowy Plover example, a DPS can be listed even though the populations of the taxonomic species are common elsewhere.  CEQA does not preclude use of the DPS concept to assist in understanding whether a species is endangered, threatened, or rare based on its local rarity; on the contrary, the CEQA Guidelines definition of “rare” appears to invite the consideration of similar circumstances that would inform the determination of a DPS under the federal ESA.

Under CEQA, lead agencies have considerable discretion in determining whether a species should be considered rare or sensitive.  See, for example, the State CEQA Guidelines Appendix G checklist cited above, which indicates that lead agencies may designate candidate, sensitive, or special-status species in local or regional plans, policies, or regulations.  A list of locally rare or sensitive species, if it is developed based on evidence that the local rarity meets the CEQA criteria for rarity, will effectively establish a rebuttable presumption of significance for species that may be adversely affected by a project.  In this respect, a list of locally rare species as presented below will function in a manner similar to the threshold of significance that a lead agency may establish.  CEQA requires, however, that thresholds of significance for general use in a lead agency’s environmental review process “must be adopted by ordinance, resolution, rule, or regulation, and developed through a public review process and be supported by substantial evidence.”  Guidelines §15064.7.  For a list of locally rare or sensitive species to function as a set of thresholds of significance, therefore, the list should be adopted through a public review process.  Even if the list is not adopted through a public review process, it will establish substantial evidence of rarity if it is accompanied by additional information showing, for example, that the local occurrences of a listed species constitute a substantial portion of the species’ range.

CNPS believes that this list of locally rare plants meets the definitions of rarity, at least locally, to satisfy consideration under CEQA.  This checklist is supported by substantial evidence in the files of the author and data obtained from public herbaria and knowledgable local botanists.  Many of the taxa listed in this checklist are also listed by CNPS as rare or sensitive statewide, as well as those taxa formally listed under the California and/or federal ESA.

This checklist is updated regularly based on new information on the Ventura County flora.  Species are added or deleted from this list as the new data warrant; therefore, be sure to obtain the most up-to-date version of this checklist.  For example, for this update, compared to the 3 August 2007 version, 9 taxa were added, 20 were dropped (listed at end of this list), 13 had their rarity status changed (usually lowered from Rare to Uncommon), and 2 taxa were added to the “expected to occur” list while 9 taxa where removed.  Changes in nomenclature were also made, where appropriate.  Future changes to this list will not likely be as dramatic as the status of the flora of Ventura County is now better understood after extensive searches of California public herbaria were conducted through the Jepson Herbarium on-line Consortium database.

The most up-to-date version can be downloaded (as a PDF) from the Channel Islands Chapter CNPS website at www.cnpsci.org, or by contacting the author directly.  Please send your notes on corrections, errors, and plant populations/occurrences you are aware of that may not be on this checklist to the author:  David Magney, P.O. Box 1346, Ojai, CA 93024-1346 or via email at david(at)magney(dot)org.  Also contact the author if you need any specific locality data on any particular taxon included in this checklist.

Checklist of Rare Plants

Scientific Name[7]                                                                                                  Common Name[8]

Abies lowiana (Gordon & Glendinning) E. Murray                                       California White Fir (U) LPNF

Abronia maritima Nutt. ex S. Watson X A. umbellata Lam.                        Hybrid Sand-verbena (R)

Abronia maritima Nutt. ex S. Watson                                                             Red or Sticky Sand-verbena (U) CNPS 4

Abronia pogonantha Heimerl                                                                           Desert Sand-verbena (R)

Abronia turbinata Torr. ex S. Watson                                                             Turbinate Sand-verbena (R)

Abronia villosa S. Watson var. aurita (Abrams) Jeps.                                                Woolly Sand-verbena (R)

Acanthomintha obovata var. cordata Jokerst                                                               Heartleaf Thornmint (U)

Acanthoscyphus [Oxytheca] parishii (Parry) Small var. parishii                Parish’s Oxytheca (R) CNPS 4.2

Achnatherum aridum (M.E. Jones) Barkworth                                               Mormon Needlegrass (R)

Achnatherum occidentalis (Thurber) Barkworth ssp. occidentalis           Western Needlegrass (R)

Achnatherum occidentalis ssp. pubescens (Vasey) Barkworth                  Elmer Needlegrass (R)

Achnatherum parishii (Vasey) Barkworth                                                      Parish Needlegrass (R)

Achnatherum thurberianum (Piper) Barkworth                                              Thurber Needlegrass (R)

Achyrachaena mollis Schauer                                                                          Blow-Wives (U)

Adenostoma sparsifolium Torrey                                                                     Red Shank, Ribbon-bush (U)

Agoseris elata (Nuttall) E. Greene                                                                     Tall Mountain Dandelion (R)

Agoseris heterophylla var. cryptopleura Greene                                          Mountain Dandelion (U)

Agrostis exarata Trin.                                                                                         Western or Spike Bentgrass (U)

Scientific Name                                                                                                   Common Name

Agrostis hallii Vasey                                                                                          Hall’s Bentgrass (R)

Agrostis pallens Trin.                                                                                         Thingrass (R)

Agrostis stolonifera var. palustris (Hudson) Pers.                                        Creeping Bentgrass (U)

Alisma plantago-aquaticum L.                                                                         Common or Broadleaf Water-plantain (R)

Allium amplectens Torrey                                                                                  Narrowleaf Onion (R)

Allium cratericola Eastw.                                                                                  Cratered Onion (R)

Allium denticulatum (Traub) D. McNeal                                                         Dentate Fringed Onion (R)

Allium diabloense (Traub) D. McNeal                                                             Diablo Onion (U)

Allium haemaetochiton S. Watson                                                                  Red-skinned Onion (U)

Allium howellii var. clokeyi Traub                                                                  Mount Pinos Onion (R, Type) CNPS 1B

Allium lacunosum var. davisiae (M.E. Jones) D. McNeal                            Davis Onion (R, W Limits)

Allium lacunosum S. Watson var. lacunosum                                                               Pitted Onion (R)

Allium monticola Davidson                                                                              Mountain Onion (R)

Allium parryi S. Watson                                                                                    Parry Fringed Onion (R)

Allium parvum Kellogg                                                                                      Small Onion (R)

Allium peninsulare Lemmon var. peninsulare                                               Peninsular Onion (R)

Allium praecox Brandegee                                                                                                Early Onion (R)

Allium sanbornii Alph. Wood var. sanbornii                                                                Sanborn Onion (R)

Allium tribracteatum Torrey                                                                             Three-bracted Onion (R)

Allium vineale L.                                                                                                 Wild Garlic (R)

Allophyllum divaricatum (Nuttall) A.D. Grant & V. Grant                           Divaricate Allophyllum (R)

Allophyllum gilioides (Bentham) A.D. Grant & V. Grant ssp. gilioides    Straggling Gilia (U)

Alnus incana ssp. tenuifolia (Nuttall) Breitung                                             Mountain Alder (R, Disjunct, S Limits)

Alopecurus carolinianus Walter                                                                      Carolina Foxtail (R)

Alopecurus saccatus Vasey                                                                               Pacific Foxtail (R)

Amaranthus blitoides S. Watson                                                                     Prostrate Amaranth (U)

Amaranthus californicus (Moq.) S. Watson                                                  California Amaranth (R)

Amaranthus palmeri S. Watson                                                                       Palmer Amaranth (U)

Amaranthus powellii ssp. bouchenii (Thell.) Costea & Carretero              Bouchenl Amaranth (R)

Amaranthus powellii S. Watson ssp. powellii                                                              Powell Amaranth (U)

Ambrosia chamissonis (Less.) E. Greene                                                         Beach Bur (U)

Ambrosia confertiflora DC.                                                                               Weak-leaved Burweed or Bur-sage (R)

Ambrosia salsola var. fasiculata (A. Nelson) Stother & B.G. Baldwin      White Burrobrush (R)

Ambrosia salsola (T.&G. Ex G.) Stother & B.G. Baldwin var. salsola         Burrobrush (R)

Amelanchier alnifolia var. pumila (Nuttall) Nelson                                      Alderleaf Service-berry (R)

Amelanchier pallida E. Greene                                                                         Western or Pallid Service-berry (R, Type)

Amelanchier utahensis Koehne                                                                        Utah Service-berry (R)

Ammannia coccinea Rottb.                                                                               Long-leaved or Purple Ammannia (R)

Amsinckia douglasiana A. DC.                                                                        Douglas Fiddleneck (R)

Amsinckia menziesii (Lehm.) Nelson & J.F. Macbr. var. menziesii             Common or Menzeis Fiddleneck (U)

Amsinckia spectabilis Fischer & C. Meyer var. spectabilis                        Showy Fiddleneck (R)

Amsinckia tessellata Gray var. tessellata                                                       Devil’s Lettuce, Tessellate Fiddleneck (R)

Amsinckia tessellata var. gloriosa (Suksd.) Hoover                                     Glorious Fiddleneck (R)

Ancistrocarphus filagineus Gray                                                                      Woolly Fishhooks (U)

Andropogon glomeratus var. pumilus Vasey ex Dewey                               Bushy Bluestem (R)

Andropogon glomeratus var. scabriglumis C.S. Campbell                          Southwestern Bushy Bluestem (U)

Androsace elongata ssp. acuta (E. Greene) G. Robb.                                   Rock-jasmine (R)

Anisocoma acaulis Torrey & A. Gray                                                              Scale Bud (U)

Antennaria dimorpha (Nuttall) Torrey & A. Gray                                         Low Everlasting (R)

Antirrhinum coulterianum Bentham ssp. coulterianum                              White Snapdragon (U)

Antirrhinum nuttallianum Benth. ssp. nuttallianum                                   Nuttall Snapdragon (R)

Antirrhinum nuttallianum ssp. subsessile (A. Gray) D. Thompson           Nuttall Snapdragon (R)

Antirrhinum ovatum Eastwood                                                                         Oval-leaved Snapdragon (R)

Aphanes occidentalis (Nuttall) Rydb.                                                              Dew-cup, Lady’s Mantle (R)

Aphanisma blitoides Moq.                                                                                                Aphanisma (R)

Apocynum androsaemifolium L.                                                                       Bitter Dogbane (U)

Scientific Name                                                                                                   Common Name

Apocynum Xmedium E. Greene (A. androsaemifolium ssp. a. var. incanum X A. cannabinum var. hypericifolium)           Bitter Dogbane (R)

Aquilegia eximia Van Houtte ex Planchon                                                     Van Houtte Columbine (R)

Aquilegia formosa var. truncata (Fischer & C.A. Meyer) Baker Truncate Crimson Columbine (U)

Arabis breweri S. Watson var. breweri                                                           Brewer Rock Cress (R, S Limits)

Arabis hoffmannii (Munz) Rollins                                                                    Hoffmann Rock Cress (R/E)

Arabis holboellii var. retrofracta (Graham) Rydb.                                        Holboell Rock Cress (R)

Arabis pulchra M.E. Jones var. gracilis M.E. Jones                                     Desert Rock Cress (R, SW Limits)

Arabis repanda S. Watson var. repanda                                                        Yosemite Rock Cress (U)

Aralia californica S. Watson                                                                            Elk Clover, Spikenard (R)

Arbutus menziesii Pursh                                                                                     Pacific Madrone (R)

Arceuthobium abietinum (Engelm.) Hawksw. & Wiens                               Dwarf Fir Mistletoe (R)

Arceuthobium californicum Hawksworth & Wiens                                      Sugar Pine Dwarf Mistletoe (R)

Arceuthobium campylopodum Engelm.                                                           Western Dwarf Mistletoe (U)

Arceuthobium cyanocarpum Coulter & A. Nelson                                       Limber Pine Dwarf Mistletoe (R)

Arceuthobium divaricatum Engelm.                                                                                Pinyon Dwarf Mistletoe (U)

Arceuthobium occidentale Engelm.                                                                 Foothill Pine Dwarf Mistletoe (R)

Arctostaphylos canescens Eastw.                                                                     Hoary Manzanita (R)

Arctostaphylos glandulosa Eastw. X.A. glauca Lindley                              Eastwood-Bigberry Manzanita Hybrid (R)

Arctostaphylos glandulosa ssp. adamsii (Munz) Munz                              Adams Eastwood Manzanita (R)

Arctostaphylos glandulosa ssp. cushingiana (Eastw.) Keeley, Vasey & Parker     Cushing’s Eastwood Manzanita (R)

Arctostaphylos patula Greene                                                                          Greenleaf Manzanita (R)

Arctostaphylos pungens H.B.K.                                                                        Pungent Manzanita (U)

Aristida adscensionis L.                                                                                     Sixweeks Threeawn Grass (R)

Aristida divaricata Humb. & Bonpl. ex Willd.                                               Poverty Threeawn Grass (R)

Aristida ternipes var. hamulosa (Henrard) J.S. Trent                                    Hook Threeawn Grass (R)

Artemisia ludoviciana Nuttall ssp. ludoviciana                                           Silver or Western Mugwort (R)

Artemisia nesiotica Raven                                                                                 Island Sagebrush (R)

Artemisia tridentata ssp. parishii (Gray) H.M. Hall & Clements                Parish Great Basin Sagebrush (R, W Limits)

Artemisia tridentata ssp. vaseyana (Rydb.) Beetle                                       Vasey Great Basin or Mountain Sagebrush (R)

Arthrocnemum [Salicornia] subterminalis (Parish) Standley                     Common or Parish Glasswort (R)

Asclepias erosa Torrey                                                                                       Desert Milkweed (R)

Asclepias vestita Hook. & Arn.                                                                         Woolly Milkweed (R)

Aspidotis californica (Hooker) Nuttall ex Copeland                                      California Lace Fern (U)

Asplenium vespertinum Maxon                                                                         Western Spleenwort (R)

Aster ascendens Lindley                                                                                     Long-leaved Aster (R)

Aster chilensis Nees                                                                                            Common California Aster (U)

Aster greatae Parish                                                                                            Greata’s Aster (R)

Aster lanceolatus ssp. hesperius (Gray) Semple & Chmielewski Siskiyou Aster (R)

Aster lentus E. Greene                                                                                         Suisun Marsh Aster (R)

Astragalus asymmetricus E. Sheldon                                                               Cockeyed Milkvetch (R)

Astragalus brauntonii Parish                                                                            Braunton Milkvetch (R) Listed Endangered

Astragalus coccineus Brandegee                                                                     Scarlet Milkvetch (R)

Astragalus curtipes A. Gray                                                                              San Luis Obispo Milkvetch (R)

Astragalus didymocarpus Hook. & Arn. var. didymocarpus                      Two-seeded Milkvetch (U)

Astragalus didymocarpus var. dispermus (A. Gray) Jepson                        Disperse Two-seeded Milkvetch (R)

Astragalus didymocarpus var. milesianus (Rydb.) Jeps.                             South Coast Two-seeded Milkvetch (R)

Astragalus didymocarpus var. obispoensis (Rydb.) Jeps.                           San Luis Obispo Two-seeded Milkvetch (R)

Astragalus douglasii var. parishii (Gray) M.E. Jones                                  Parish Milkvetch (R)

Astragalus filipes Gray                                                                                       Thread-leaved Locoweed (U)

Astragalus gambelianus E. Sheldon                                                                                Dwarf Locoweed (U)

Astragalus lentiginosus Hook. var. diphysus                                                                 Freckled Locoweed (R)

Astragalus lentiginosus Hooker var. fremontii (A. Gray) S. Watson         Fremont Spotted Locoweed (U)

Astragalus lentiginosus var. nigricalycis M.E. Jones                                  Black-sepaled Freckled Locoweed (R)

Astragalus lentiginosus var. sierrae M.E. Jones                                           Bear Valley Milkvetch (R, CNPS 1B)

Astragalus leucolobus M.E. Jones                                                                   Bear Valley Woollypod (R)

Astragalus leucopsis Torrey var. leucopsis                                                    Coast Rattleweed (R)

Scientific Name                                                                                                   Common Name

Astragalus macgregorii (Rydb.) Tidestr.                                                        MacGregor Locoweed (R, Type)

Astragalus macrodon (Hook. & Arn.) Gray                                                    Salinas Valley Milkvetch (R)

Astragalus miguelensis Greene                                                                         San Miguel Milkvetch (R)

Astragalus nuttallii (Torrey & A. Gray) J.T. Howell                                     Nuttall’s Milkvetch (R)

Astragalus oxyphysus Gray                                                                               Robust Milkvetch (R)

Astragalus pachypus var. jaegeri Munz                                                         Jaeger Milkvetch (R, N Limits)

Astragalus pomonensis M.E. Jones                                                                 Pomona Locoweed (R)

Astragalus purshii Douglas ex Hooker var. purshii                                      Pursh’s Woollypod Milkvetch (R)

Astragalus pycnostachyus var. lanosissimus (Rydb.) Munz                      Ventura Marsh Milkvetch (R/E)

Astragalus traskiae Eastwood                                                                          Trask Locoweed or Milkvetch (R)

Astragalus trichopodus (Nutt.) Gray var. trichopodus                                 Three-pod Milkvetch (U)

Astragalus trichopodus var. lonchus (M.E. Jones) Barneby                       Three-pod Milkvetch (U)

Astragalus whitneyi Gray var. whitneyi                                                          Whitney Locoweed (R)

Astragalus whitneyi var. pinosus Elmer                                                          Mount Pinos Locoweed (R, Type)

Athysanus pusillus (Hook.) Greene                                                                  Dwarf Athysanus (U)

Atriplex argentea var. mohavensis M.E. Jones                                              Mojave Silverscale (R)

Atriplex californica Moq.                                                                                  California Saltbush (U)

Atriplex canescens ssp. linearis (S. Watson) H.M. Hall & Clements         Narrowleaf Fourwing Saltbush (R)

Atriplex coulteri (Moq.) D. Dietr.                                                                     Coulter Saltbush (R)

Atriplex lentiformis (Torrey) S. Watson ssp. lentiformis                             Big Saltbush, Quailbrush (U, W Limits)

Atriplex leucophylla (Moq.) D. Dietr.                                                              Whiteleaf, Beach Saltbush or Seascale (U)

Atriplex pacifica Nelson                                                                                    South Coast Saltbush (R)

Atriplex polycarpa (Torrey) S. Watson                                                          Common Saltbush, Allscale (R)

Atriplex serenana var. davidsonii (Standley) Munz                                     Davidson Bractscale (R)

Atriplex serenana Nelson var. serenana                                                         Bractscale (R)

Atriplex subspicata (Nutt.) Rydb.                                                                    Saline Saltscale (R)

Atriplex triangularis Willd.                                                                               Spearscale (U)

Atriplex watsonii Nelson                                                                                   Matscale (R)

Azolla filiculoides Lam.                                                                                      Duckweed Fern (U)

Baccharis douglasii DC.                                                                                    Marsh Baccharis, Douglas False-willow (U)

Baccharis emoryi Gray                                                                                       Emory Baccharis (R)

Baccharis malibuensis Beauchamp & Henrickson                                        Malibu Baccharis (R)

Baccharis plummerae Gray                                                                               Plummer Baccharis (U) CNPS List 4

Barbarea orthoceras Ledeb.                                                                             American Wintercress (U)

Batis maritima L.                                                                                                 Saltwort, Beachwort (R)

Berberis dictyota Jeps.                                                                                       Dull-leaf or Jeps. Holly-leaved Barberry (R)

Berberis pinnata ssp. insularis Munz                                                             Island Barberry (R)

Berula erecta (Huds.) Coville                                                                            Cutleaf Water-parsnip (R)

Bidens frondosa L.                                                                                              Sticktight (R)

Bidens laevis (L.) Britton, Sterns & Pogg.                                                       Bur-marigold (R)

Bloomeria crocea var. montana (E. Greene) Ingram                                     Mountain Goldenstars (U)

Bolboschoenous maritimus (L.) Palla var. paludosus (Nelson) Koyama   Saltmarsh Bulrush (R)

Bolboschoenous maritimus X B. robustus                                                      Hybrid Bulrush (R)

Bolboschoenous robustus (Pursh) Soják, Čas. Nár.                                       Seashore Bulrush (R)

Boschniakia strobilacea Gray                                                                          California Ground Cone (R)

Bothriochloa barbinodis (Lagasca) Herter                                                    Cane Bluestem (U)

Botrychium simplex E. Hitchc.                                                                          Least Moonwort, Little Grapefern (R)

Bowlesia incana Ruiz Lopez & Pavon                                                             Hoary Bowlesia (U)

Boykinia occidentalis T. & G.                                                                          Santa Lucia Brookfoam (R)

Boykinia rotundifolia C. Parry                                                                         Roundleaved Boykinia (R)

Brickellia californica (T. & G.) Gray X B. nevinii Gray                                California-Nevin Brickellbush Hybrid (R)

Brickellia desertorum Coville                                                                           Desert Brickellbush (R)

Brickellia multiflora Kellogg                                                                            Gum-leaved Brickellbush (R)

Brodiaea coronaria (Salisbury) Jepson ssp. coronaria                              Crown Brodiaea (R)

Brodiaea terrestris ssp. kernensis (Hoover) Niehaus                                  Harvest Brodiaea (R)

Bromus arizonicus (Shear) Stebbins                                                                Arizona Brome (U)

Scientific Name                                                                                                   Common Name

Bromus laevipes Shear                                                                                       Woodland Brome (R)

Bromus orcuttianus (Shear) A. Hitchc.                                                            Orcutt Brome (R)

Bromus pseudolaevipes Wagnon                                                                     Woodland Brome (R)

Cakile edentula (Bigelow) Hooker ssp. edentula                                         American Searocket (R)

Calandrinia breweri S. Watson                                                                       Brewer Calandrinia (R) CNPS List 4

Calandrinia maritima Nutt.                                                                              Seaside Redmaids (R) CNPS List 4

Californica macrophylla (H.& A.) Aldas., C. Navarro, P. Vargas, Ll. Saez & Aedo      Largeleaf Filaree (R)

Callitriche marginata Torrey                                                                           California Water-starwort, Wallow Starwort (R)

Calocedrus decurrens (Torrey) Florin                                                             Incense Cedar  (U)

Calochortus catalinae S. Watson                                                                   Catalina Mariposa Lily (U) CNPS List 4

Calochortus clavatus S. Watson ssp. clavatus                                             Club-haired Mariposa Lily (U) CNPS List 4

Calochortus clavatus ssp. pallidus (Hoover) Munz                                    Pale Yellow Mariposa Lily (R)

Calochortus invenustus E. Greene                                                                   Plain Mariposa Lily (U)

Calochortus luteus Lindley                                                                               Gold Nuggets (R)

Calochortus palmeri S. Watson var. palmeri                                                                Palmer Mariposa Lily (R) CNPS List 1B

Calochortus plummerae Greene                                                                       Plummer Mariposa Lily (R) CNPS List 1B

Calochortus weedii var. vestus Purdy                                                             Weed Mariposa Lily (R) CNPS List 1B

Calyptridium monospermum Greene                                                               One-seeded Pussypaws (R)

Calyptridium parryi Gray var. parryi                                                              Parry Calyptridium (U)

Calyptridium umbellatum (Torrey) Greene                                                    Pussypaws (U)

Calystegia macrostegia ssp. amplissima Brummitt                                      Island Morning-glory (R)

Calystegia malacophylla ssp. tomentella var. deltoidea (Greene) Munz                Tehachapi Morning-glory (R)

Calystegia occidentalis ssp. fulcrata (Gray) Brummitt                                Western Morning-glory (R)

Calystegia occidentalis ssp. occidentalis var. tomentella (Greene) Brummitt        Woolly Western Morning-glory (R)

Calystegia peirsonii (Abrams) Brummitt                                                        Peirson’s Morning-glory (R)

Calystegia sepium ssp. binghamiae (Greene) Brummitt                               Bingham Morning-glory (R) CNPS List 1A

Calystegia soldanella (L.) R. Br.                                                                      Beach Morning-glory (U)

Camissonia brevipes (A. Gray) Raven ssp. brevipes                                    Yellow Cups (R)

Camissonia campestris cf. ssp. obispoensis Raven                                      San Luis Obispo Sun-cup (R)

Camissonia cheiranthifolia (Sprengel) Raim ssp. cheiranthifolia             Beach Primrose (R)

Camissonia cheiranthifolia ssp. suffruticosa (S. Watson) Raven             Beach Primrose (U)

Camissonia confusa Raven                                                                               Confusing Primrose (R)

Camissonia graciliflora (Hooker & Arnott) Raven                                      Hill Sun-cup (R)

Camissonia ignota (Jepson) Raven                                                                 Small Primrose (U)

Camissonia luciae Raven                                                                                  Santa Lucia Sun-cup (R)

Camissonia micrantha (Sprengel) Raven                                                       Tiny Primrose (U)

Camissonia pallida (Abrams) Raven ssp. pallida                                        Pale Primrose (R)

Camissonia palmeri (S. Watson) Raven                                                         Palmer Primrose (R)

Cardamine breweri S. Watson var. breweri                                                  Brewer’s Bitter-cress (R)

Cardamine oligosperma Torrey & Gray                                                         Few-seeded Bitter-cress (R)

Cardamine pachystigma (S. Watson) Rollins var. pachystigma                                Toothwort (R)

Cardionema ramosissimum (Weinm.) A. Mels. & J.F. Macbr.                    Sand Mat (R)

Carex abrupta Mackenzie                                                                                 Abrupt-beaked Sedge (R)

Carex alma L. Bailey                                                                                           Sturdy Sedge (U)

Carex athrostachya Olney                                                                                                Slender-beaked Sedge (R)

Carex aurea Nuttall                                                                                            Golden-fruited Sedge (R)

Carex barbarae Dewey                                                                                      Santa Barbara Sedge (R)

Carex bolanderi Olney                                                                                      Bolander Sedge (R)

Carex brainerdii Mack.                                                                                     Brainerd Sedge (R)

Carex densa L. Bailey                                                                                         Dense Sedge (R)

Carex douglasii Boott                                                                                        Douglas Sedge (R)

Carex filifolia var. erostrata Kük.                                                                    Short-grass Sedge (R)

Carex fracta Mackenzie                                                                                     Fragile-sheathed Sedge (R)

Carex globosa Boott                                                                                          Round-fruited Sedge (R)

Carex hassei L. Bailey                                                                                        Hasse Sedge (R)

Carex lanuginosa Michaux                                                                               Woolly Sedge (R)

Scientific Name                                                                                                   Common Name

Carex multicaulis L. Bailey                                                                               Many-stemmed Sedge (R)

Carex nebrascensis Dewey                                                                               Nebraska Sedge (R)

Carex pansa L. Bailey                                                                                         Sand Dune Sedge (R)

Carex subfusca W. Boott                                                                                   Brown Sedge (U)

Carex triquetra Boott                                                                                         Triangluar-fruited Sedge (R)

Castilleja angustifolia (Nuttall) G. Don                                                          Desert Indian Paintbrush (R)

Castilleja applegatei ssp. disticha (Eastw.) Chuang & Heckard                               Eastwood Indian Paintbrush (R)

Castilleja applegatei ssp. pinetorum (Fern.) Chuang & Heckard              Wavyleaf Indian Paintbrush (R)

Castilleja attenuata (Gray) Chuang & Heckard                                             Valley Tassels (R)

Castilleja densiflora (Benth.) Chuang & Heckard ssp. densiflora             Dense-flowered Owl's Clover (R)

Castilleja gyroloba Pennell                                                                               Indian Paintbrush (R, Type)

Castilleja lanata ssp. hololeuca (Greene) Chuang & Heckard                   White-felted Indian Paintbrush (R)

Castilleja linariifolia Benth.                                                                             Linaria-leaved Indian Paintbrush (R)

Castilleja miniata Hook. ssp. miniata                                                            Great Red Indian Paintbrush (R)

Castilleja minor (A. Gray) A. Gray ssp. minor                                               Annual Indian Paintbrush (R)

Castilleja minor ssp. spiralis (Jeps.) Chuang & Heckard                            Large-flowered Annual Indian Paintbrush (R)

Castilleja mollis Pennell                                                                                    Soft-leaved Indian Paintbrush (R)

Castilleja subinclusa ssp. franciscana (Pennell) Chuang & Heckard       San Francisco Long-leaved Indian Paintbrush (R)

Caulanthus amplexicaulis S. Watson var. amplexicaulis                           Clasping-leaved Jewelflower (R)

Caulanthus anceps Payson                                                                              Lemmon Mustard (R)

Caulanthus californicus (S. Watson) Payson                                                               California Jewelflower (R) Fed-Endangered

Caulanthus coulteri var. lemmonii (S. Watson) Munz                                                Lemmon Jewelflower (R)

Caulanthus heterophyllus (Nutt.) Payson var. heterophyllus                    Different-leaved Jewelflower (R)

Caulanthus inflatus S. Watson                                                                        Desert Candle (R)

Ceanothus dentatus T. & G.                                                                              Dentate Ceanothus (R)

Ceanothus greggii ssp. vestitus (Greene) McMinn                                      Mojave Ceanothus (U)

Ceanothus megacarpus var. insularis (Eastw.) Munz                                  Island Ceanothus (R)

Ceanothus megacarpus var. pendulous McMinn                                         Pendulous Bigpod Ceanothus (R)

Ceanothus oliganthus var. sorediatus (Hook. & Arn.) Hoover                  Jim Brush (R)

Ceanothus palmeri Trel.                                                                                    Palmer Ceanothus (U)

Ceanothus papillosus T. & G. ssp. papillosus                                              Wartleaf Ceanothus (U)

Ceanothus papillosus ssp. roweanus McMinn                                             Wartleaf Ceanothus (R)

Ceanothus tomentosus var. olivaceous Jepson                                             Woollyleaf Ceanothus (R)

Celtis reticulata Torrey                                                                                     Netleaf Hackberry (R)

Centaurium exaltatum (Griseb.) W. Wright ex Piper                                     Great Basin Centaury (U)

Centaurium venustum (A. Gray) B.L. Robins. ssp. venustum                      Beautiful Centaury, Canchalagua (R)

Centromadia parryi ssp. australis (Keck) B.G. Baldwin                              Southern Tarplant (R)

Centrostegia thurberi var. macrotheca                                                          Thurber Spineflower (R)

Ceratophyllum demersum L.                                                                             Hornwort, Coontail (R)

Cercocarpus betuloides var. blancheae (C. Schneider) Little                     Island Mountain Mahogany (R)

Cercocarpus ledifolius var. intermontanus N. Holmgren                            Cut-leaved Mountain Mahogany (U)

Cercocarpus ledifolius Nuttall var. ledifolius                                                                Mountain Mahogany (R)

Chaenactis artemisiifolia (Gray) Gray                                                             White Pincushion (U)

Chaenactis fremontii A. Gray                                                                           Desert Pincushion (R)

Chaenactis glabriuscula var. heterocarpha (A. Gray) H.M. Hall              Different-seeded Yellow Pincushion (R)

Chaenactis glabriuscula var. lanosa (DC.) H.M. Hall                                  Woolly Yellow Pincushion (U)

Chaenactis glabriuscula var. megacephala A. Gray                                   Big-flowered Yellow Pincushion (R)

Chaenactis glabriuscula var. orcuttiana (Greene) H.M. Hall                     Woolly Yellow Pincushion (R) CNPS List 1B

Chaenactis stevioides Hook. & Arn.                                                               Desert Pincushion (R)

Chaenactis xantiana Gray                                                                                 Xantus Pincushion (U)

Chamaescyce micromera (Engelm.) Wooton & Standl.                                Sonoran Sandmat (R)

Chamaesyce ocellata (Durand & Hilg.) Millsp. ssp. ocellata                     Littleye Spurge (R)

Chamaesyce polycarpa var. hirtella (Boiss.) Parish                                     Hairy Golondrina (R)

Chamaesyce polycarpa (Benth.) Millsp.                                                         Golondrina (R)

Chamaesyce serpens (Kunth) Small                                                                 Matted Sandmat (R)

Chamaesyce serpyllifolia (Pers.) Small ssp. serpyllifolia                            Thyme-leaved Spurge (R)

Scientific Name                                                                                                   Common Name

Cheilanthes clevelandii D.C. Eaton.                                                                                Cleveland Lip-fern (R)

Cheilanthes cooperae D.C. Eaton                                                                    Mrs. Cooper Lip-fern (R)

Cheilanthes newberryi (D.C. Eaton) Domin                                                   Cotton Fern (R)

Chenopodium atrovirens Rydb.                                                                       Pigweed (R)

Chenopodium fremontii S. Watson                                                                 Fremont Goosefoot (U)

Chenopodium pratericola Rydb.                                                                     Narrow-leaved Goosefoot (R)

Chorizanthe blakleyi Hardham                                                                        Blakley’s Spineflower (R)

Chorizanthe clevelandii C. Parry                                                                     Cleveland Spineflower (R)

Chorizanthe douglasii Benth.                                                                          Douglas Spineflower (R)

Chorizanthe membranacea Benth.                                                                  Pink Spineflower (R)

Chorizanthe parryi var. fernandina (S. Watson) Jepson                            San Fernando Valley Spineflower (R) Endangered

Chorizanthe procumbens Nutt.                                                                        Prostrate Spineflower (R)

Chorizanthe staticoides forma bracteata Goodman                                     Bracted Turkish Rugging (R, Type)

Chorizanthe uniaristata T. & G.                                                                      One-awned Spineflower (R)

Chrysothamnus nauseosus ssp. = Ericameria nauseosa var.                     taxonomic revisions

Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus                    Yellow Rabbitbrush (R)

Cicuta douglasii (DC.) Coulter & Rose                                                           Western Water-hemlock (R)

Cirsium brevistylum Cronq.                                                                               Indian Thistle (R)

Cirsium occidentale var. venustum (E. Greene) Jepson                                Red or Venus Thistle (U)

Cirsium scariosum Nuttall                                                                                 Elk Thistle (R)

Clarkia affinis Lewis & Lewis                                                                           Hairy Clarkia (R)

Clarkia cylindrica (Jepson) H. Lewis & M. Lewis ssp. cylindrica            Cylindrical Godetia (R)

Clarkia cylindrica ssp. clavicarpa W. Davis                                                               Cylindrical Godetia (R)

Clarkia dudleyana (Abrams) J.F. Macbr.                                                       Dudley Godetia (R)

Clarkia modesta Jeps.                                                                                        Modest Clarkia (R)

Clarkia purpurea ssp. viminea (Douglas) Lewis & Lewis                          Large Purple Clarkia (R)

Clarkia rhomboidea Douglas                                                                           Rhomboid Clarkia (U)

Clarkia xantiana Gray ssp. xantiana                                                             Xantus Clarkia (R)

Claytonia exigua T. & G. ssp. exigua                                                             Small Miner's Lettuce (U)

Claytonia parviflora Hook. ssp. parviflora                                                   Small-flowered Miner's Lettuce (U)

Claytonia parviflora ssp. viridis (Davidson) J.M. Miller & Chambers     Green Small-flowered Miner's Lettuce (R)

Claytonia rubra (J.T. Howell) Tidestrom ssp. rubra                                    Red Miner's Lettuce (U)

Collinsia bartsiifolia var. davidsonii (Parish) V. Newsom                          Davidson White Chinese Houses (R)

Collinsia childii A. Gray                                                                                   Child Blue-eyed Mary (R)

Collinsia parryi A. Gray                                                                                    Parry Blue-eyed Mary (R)

Collinsia parviflora Lindley                                                                             Blue-eyed Mary, Blue Lips (R)

Collinsia torreyi var. wrightii (S. Watson) I.M. Johnston                          Wright Blue-eyed Mary (U)

Collomia grandiflora Lindley                                                                           Large-flowered Collomia (U)

Collomia tinctoria Kellogg                                                                               Yellow-staining Collomia (R)

Comarostaphylis diversifolia ssp. planifolia (Jeps.) G. Wallace                               Simpleleaf Summer Holly (R)

Convolvulus simulans Perry                                                                              Small-flowered Morning-glory (R)

Conyza coulteri Gray                                                                                          Coulter Horseweed (R)

Cordylanthus maritimus Benth. ssp. maritimus                                            Saltmarsh Birds-beak (R) Listed E

Cordylanthus rigidus ssp. setiferus Chuang & Heckard                              Dark-tipped Rigid Bird’s-Beak (U)

Coreopsis calliopsidea (DC.) A. Gray                                                             Leafy-stemmed Coreopsis (R)

Cornus glabrata Bentham                                                                                 Brown Dogwood (R)

Cornus sericea L. ssp. sericea                                                                          American or Creek Dogwood (R)

Crassula aquatica (L.) Schönl.                                                                         Water Pigmy-Weed (R)

Crepis acuminata Nuttall                                                                                   Long-leaved Hawksbeard (R)

Crepis occidentalis Nuttall ssp. occidentalis                                                                Western Hawksbeard (U)

Crepis occidentalis ssp. pumila (Rydb.) Babcock & Stebbins                   Western Hawksbeard (R)

Cressa truxillensis Kunth var. truxillensis                                                     Spreading Alkali-Weed (U)

Cryptantha barbigera (A. Gray) E. Greene                                                     Bearded Forget-Me-Not (R)

Cryptantha corollata (I.M. Johnston) I.M. Johnston                                  Crowned Forget-Met-Not (R, Type)

Cryptantha decipiens (M.E. Jones) A.A.Heller                                             Gravel Forget-Me-Not (R)

Cryptantha echinella E. Greene                                                                       Prickly Forget-Me-Not (U)

Scientific Name                                                                                                   Common Name

Cryptantha flaccida (Lehm.) E. Greene                                                           Flaccid Forget-Me-Not (R)

Cryptantha leiocarpa (Fischer & C. Meyer) E. Greene                                Coast Forget-Me-Not (R)

Cryptantha maritima (Greene) Greene                                                            Seaside Forget-Me-Not (R)

Cryptantha micrantha (Torrey) I.M. Johnston                                              Eremocarya (R)

Cryptantha micromeres (A. Gray) E. Greene                                                  Minute-flowered Forget (R)

Cryptantha microstachys (A. Gray) E. Greene                                               Tejon Forget-Me-Not (U)

Cryptantha mohavensis (Greene) Greene                                                        Mojave Forget-Me-Not (R)

Cryptantha nemaclada E. Greene                                                                    Colusa Forget-Me-Not (U)

Cryptantha nevadensis A. Nelson & Kennedy var. nevadensis                 Nevada Forget-Me-Not (R)

Cryptantha nevadensis A. Nelson & Kennedy var. rigida Brand              Rigid Nevada Forget-Me-Not (R)

Cryptantha oxygona (A. Gray) E. Greene)                                                      Sharp-not Forget-Me-Not (R)

Cryptantha simulans E. Greene                                                                        Pine Forget-Me-Not (U)

Cryptantha torreyana (A. Gray) E. Greene                                                     Torrey Forget-Me-Knot (R)

Cryptantha traskiae I.M. Johnston                                                                 Trask Forget-Me-Not (R)

Cuscuta californica var. breviflora Engelmann                                             California Dodder (R)

Cuscuta campestris Yuncker                                                                             Western Field Dodder (R)

Cuscuta denticulata Engelmann                                                                      Desert Dodder (R)

Cuscuta indecora Choisy var. indecora                                                         Pretty Dodder (R)

Cuscuta indecora var. neuropetala (Engelmann) Hitchc.                            Pretty Dodder (R)

Cuscuta salina var. major Yuncker                                                                  Saltmarsh Dodder (U)

Cycladenia humilis var. venusta (Eastwood) Munz                                     Elegant Cycladenia (R)

Cyperus acuminatus Torrey & Hook.                                                              Short-pointed Umbrella-sedge (R)

Cyperus erythrorhizos Muhlenb.                                                                     Red-root Flatsedge (R)

Cyperus laevigatus L.                                                                                         Smooth Flatsedge (R)

Cyperus odoratus L.                                                                                           Flatsedge (R)

Cyperus squarrosus L.                                                                                        Awned Flatsedge (R)

Cystopteris fragilis (L.) Bernhardi                                                                    Brittle or Fragile Fern (R)

Deinandra clementina (Brandegee) B.G. Baldwin                                         Island or Catalina Tarplant (R)

Deinandra kelloggii (E. Greene) E. Greene                                                     Kellogg Tarplant (R)

Deinandra minthornii (Jepson) B.G. Baldwin                                                Santa Susana Tarplant (R, Type) Listed R

Delphinium gracilentum Greene                                                                      Coast Larkspur (R)

Delphinium gypsophilum Ewan ssp. gypsophilum                                       Gypsum Larkspur (R) CNPS List 4

Delphinium inopinum (Jeps.) H.F. Lewis & Epling                                       Unexpected Larkspur (R) CNPS List 1B

Delphinium parryi ssp. blochmaniae (Greene) F.H. Lewis & Epling         Dune Larkspur (R) CNPS List 1B

Delphinium parryi ssp. maritimum (Davidson) M.J. Warnock                   Maritime Larkspur (R)

Delphinium parryi ssp. purpureum (F. Lewis & Epling) M.J. Warnock    Mount Pinos Larkspur (U) CNPS List 4

Delphinium patens ssp. hepaticoideum Ewan                                               Spreading Larkspur (R)

Delphinium patens ssp. montanum (Munz) Ewan                                         Mountain Spreading Larkspur (R)

Delphinium umbraculorum F.H. Lewis & Epling                                           Umbrella Larkspur (R) CNPS List 1B

Deschampsia cespitosa (L.) Beauv. ssp. cespitosa                                       Tufted Hairgrass (R)

Deschampsia danthanoides (Trin.) Munro ex Bentham                               Annual Hairgrass (R)

Descurainia obtusa ssp. adenophora (Wooton & Standley) Detl.            Desert Tansy Mustard (R)

Descurainia pinnata ssp. glabra (Wooton & Standl.) Detl.                       Naken Western Tansy Mustard (R)

Descurainia pinnata ssp. halicotorum (Cockerell) Detl.                             Western Tansy Mustard (R)

Descurainia pinnata ssp. menziesii (DC.) Detl.                                             Menzies Tansy Mustard (U)

Dicentra ochroleuca Engelm.                                                                           White Eardrops, Yellow Dicentra (R)

Dicentra pauciflora S. Watson                                                                        Few-flowered Bleeding Heart (R)

Dichelostemma congestum (Sm.) Kunth                                                          Ookow (R)

Dichondra occidentalis House                                                                        Western Dichondra (R) CNPS List 4

Dieteria [Machaeranthera] canescens (Pursh) Torrey ssp. canescens     Hoary-Aster (U)

Dithyrea maritima (A. Davids.) Davidson                                                      Beach Spectacle-pod (R)

Dodecatheon alpinum (A. Gray) E. Greene                                                     Alpine Shooting Star (R)

Dodecatheon clevelandii ssp. insulare H.L. Thompson                             Island Shooting Star (R)

Dodecatheon clevelandii ssp. patulum (Greene) Thompson                      Lowland Padre Shooting Star (R)

Dodecatheon clevelandii ssp. sanctarum (E. Greene) Abrams                   Cleveland Shooting Star (U)

Downingia bella Hoover                                                                                   Hoover Downingia (R)

Scientific Name                                                                                                   Common Name

Downingia pulchella (Lindl.) Torrey                                                               Flat-face Downingia (R)

Draba cuneifolia T. & G.                                                                                   Wedgeleaf Draba (R)

Draba verna L.                                                                                                     Vernal Whitlow-grass (R)

Dudleya abramsii ssp. parva (Rose & Davids.) J. Bartel                             Conejo Live-forever (R) Listed T

Dudleya blochmaniae (Eastw.) Moran ssp. blochmaniae                           Blochman Live-forever (R) CNPS List 1B

Dudleya caespitosa (Haw.) Britt. & Rose                                                        Sea Lettuce (R)

Dudleya cymosa ssp. marcescens Moran                                                       Marcescent Live-forever (R, Type) Listed T

Dudleya cymosa ssp. ovatifolia (Britt.) Moran                                              Santa Monica Mtns. Live-forever (R) Listed T

Dudleya cymosa ssp. pumila (Rose) K. Nakai                                                Pygmy Live-forever (U)

Dudleya farinosa (Lindley) Britt. & Rose                                                        Farinose Live-forever (R)

Dudleya pulverulenta ssp. arizonica (Rose) Moran                                    Chalky Live-forever (R)

Dudleya verityi N. Nakai                                                                                    Verity Live-forever (R) Listed T

Dudleya virens (Rose) Moran                                                                           Bright Green Live-forever (R)

Eastwoodia elegans Brandegee                                                                       Yellow Mock Aster (R)

Echinochloa crus-pavonis (Kunth) Shultes                                                   Gulf Barnyard Grass (R)

Echinodorus berteroi (Spreng.) Fassett                                                          Bur Head (R)

Eclipta prostrata (L.) L.                                                                                     False Daisy (R)

Elatine brachysperma Gray                                                                               Slender Waterwort (R)

Elatine californica Gray                                                                                    California Waterwort (R)

Eleocharis acicularis (L.) Roemer & Schultes var. acicularis                    Slender Spike-rush (U)

Eleocharis bernardina Munz & Johnston                                                     Few-flowered Club-rush (R)

Eleocharis montevidensis Kunth                                                                     Sand Spike-rush (R)

Eleocharis rostellata (Torrey) Torrey                                                             Beaked Spike-rush (R)

Eleocharis suksdorfiana Beauv.                                                                      Suksdorf’s Spike-rush (R)

Elodea canadensis Rich.                                                                                    Common Waterweed (R)

Elymus glaucus ssp. jepsonii (Burtt Davy) Gould                                         Jepson Blue or Woodland Wildrye (R)

Elymus stebbinsii (Scribner & J.G. Smith) Gould                                            Wheatgrass (R)

Elymus trachycaulus ssp. subsecundus (Link) Gould                                   Slender Wheatgrass (R)

Elymus trachycaulus (Link) Shinn. ssp. trachycaulus                                  Slender Wheatgrass (R)

Emmenanthe penduliflora var. rosea Brand                                                   Rose Whispering Bells (R)

Encelia actoni Elmer                                                                                           Acton Brittlebush (U)

Encelia farinosa Torrey & A. Gray                                                                  Brittlebush, Incienso (R)

Encelia frutescens (Gray) Gray                                                                          Brittlebush, Incienso (R)

Encelia virginiensis Nelson                                                                              Brittlebush (R)

Enemion occidentale (H. & A.) J.R. Drummond & Hutchinson                  Western Meadow-rue (R)

Ephedra californica S. Watson                                                                        California Desert Tea, Cañatillo (R)

Ephedra nevadensis S. Watson                                                                        Nevada Ephedra or Mormon-tea (R)

Epilobium brachycarpum C. Presl                                                                   Panicled Willow-herb (U)

Epilobium canum ssp. latifolium (Hook.) Raven                                          Broad-leaved California Fuchsia (U)

Epilobium ciliatum ssp. glandulosum (Lehm.) P. Hoch & Raven              Sticky Northern Willow-herb (R)

Epilobium densiflorum (Lindley) P. Hoch & Raven                                      Dense-flowered Spike-primrose (R)

Epilobium foliosum (T.& G.) Suksd.                                                                Leafy Spike-primrose (R)

Epilobium glaberrinum Barbey ssp. glaberrinum                                        Waxy Willow-herb (R)

Epilobium oregonense Hausskn.                                                                     Oregon Spike-primrose (R)

Epilobium pygmaeum (Speg.) P. Hoch & Raven                                           Smooth Spike-primrose (R)

Epilobium torreyi (S. Watson) P. Hoch & Raven                                          Brook Spike-primrose (R)

Epipactis gigantea Hook.                                                                                  Stream Orchid (U)

Equisetum arvense L.                                                                                          Common or Field Horsetail (U)

Equisetum Xferrissii Clute                                                                  Ferris Horsetail (R)

Equisetum hyemale var. affine (Engelm.) Calder & R.L. Taylor   Common or Giant Scouring Rush (U)

Equisetum telmateia ssp. braunii (Milde) R.L. Hauke                                  Giant Horsetail (U)

Eragrostis mexicana (Hornem.) Link ssp. mexicana                                     Mexican Lovegrass (R)

Eragrostis mexicana var. virescens (C. Presl) Koch & E. Sanchez             Orcutt Lovegrass (R)

Eragrostis pectinacea (Michx.) Nees var. pectinacea                                  Tufted Lovegrass (R)

Eremalche parryi (E. Greene) E. Greene ssp. parryi                                      Parry Mallow (R)

Eriastrum densifolium (Benth.) Mason ssp. densifolium                             Woolly Star (R)

Scientific Name                                                                                                   Common Name

Eriastrum densifolium ssp. mohavensis (Craig) H. Mason                          Mojave Woolly Star (R)

Eriastrum eremicum (Jeps.) H. Mason ssp. eremicum                                  Woolly Star (R)

Eriastrum hooveri (Jepson) H. Mason                                                            Hoover Woolly Star (R) CNPS List 4

Eriastrum pluriflorum (A.A. Heller) H. Mason                                              Woolly Star (R)

Ericameria arborescens (A. Gray) E. Greene                                  Golden-fleece (R)

Ericameria cooperi (Gray) H.M. Hall var. cooperi                                        Cooper Goldenbush (R)

Ericameria cuneata (Gray) McClatchie var. cuneata                                   Wedgeleaf Goldenbush (U)

Ericameria cuneata var. spathulata (A. Gray) H.M. Hall                            Spatulate-leaved Goldenbush (R)

Ericameria ericoides (Less.) Jeps. ssp. ericoides                                         Heatherleaf Goldenbush (U)

Ericameria nauseosa var. speciosa (Nutt.) Nesom & Baird                         White-stemmed Rubber Rabbitbrush (R)

Ericameria nauseosa var. bernardina (Hall) Nesom & Baird                      San Bernardino Rubber Rabbitbrush (R)

Ericameria nauseosa var. oreophila (Greene) Nesom & Baird                   Common Rubber Rabbitbrush (U)

Ericameria parryi var. aspera (Greene) G.L. Newson & G.I. Baird             Parry Rabbitbrush (R)

Ericameria teretifolia (Durand & Hilg.) Jepson                                            Round-leaved Rabbitbrush (R)

Ericameria palmeri var. pachylepis (H.M. Hall) Nesom                              Palmer Goldenbush (R)

Ericameria pinifolia (Gray) H.M. Hall                                                             Pine Goldenbush (R)

Erigeron breweri var. covillei (Greene) G. Neswom                                     Fleabane Daisy (R)

Erigeron glaucus Ker-Gawler                                                                            Seaside Daisy (R)

Eriodictyon californicum (Hooker & Arnott) Torrey                                   California Yerba Santa (R)

Eriodictyon crassifolium Bentham var. crassifolium                                    Thickleaf Yerba Santa (U)

Eriodictyon traskiae Eastw.                                                                              Trask Yerba Santa (R)

Eriodictyon trichocalyx A.A. Heller var. trichocalyx                                  Yerba Santa (U)

Eriogonum arborescens Greene                                                                       Arborescent Buckwheat (U)

Eriogonum covilleanum Eastw.                                                                        Coville Buckwheat (R)

Eriogonum crocatum Davidson                                                                       Conejo or Saffron Buckwheat (R, Type)

Eriogonum deflexum var. baratum (Elmer) Reveal                                        Flat-crown Buckwheat (R, Type)

Eriogonum elegans Greene                                                                               Elegant Buckwheat (R)

Eriogonum gracillimum S. Watson                                                                 Slender Buckwheat (R)

Eriogonum grande Greene var. grande                                                           Island Buckwheat (U)

Eriogonum grande Greene var. rubescens Munz                                          Red Island Buckwheat (U)

Eriogonum grande Greene var. timorum Reveal                                            San Nicolas Island Buckwheat (U)

Eriogonum heermannii Durand & Hilg. var. heermannii                             Heerman Buckwheat (U)

Eriogonum hirtiflorum S. Watson                                                                   Hairy-flowered Buckwheat (U)

Eriogonum hooveri (Reveal) Reveal                                                                Hoover’s Little Trumpet (U)

Eriogonum inerme (S. Watson) Jeps.                                                              Unarmed Buckwheat (U)

Eriogonum kennedyi ssp. alpigenum (Munz & Johnston) Munz & Johnston    Alpine Kennedy Buckwheat (R) CNPS List 1B

Eriogonum kennedyi var. austromontanum Munz & I.M. Johnston         Southern Mountain Buckwheat (R) CNPS List 1B

Eriogonum latifolium Smith                                                                              Coast Buckwheat, Tibinagua (R)

Eriogonum maculatum A.A. Heller                                                                  Spotted Buckwheat (U)

Eriogonum molestum Greene                                                                            Pine Buckwheat (U)

Eriogonum nudum var. westonii (S. Stokes) J.T. Howell                              Weston Barestem Buckwheat (U)

Eriogonum nudum var. pubiflorum Benth.                                                     Hairy-flowered Barestem Buckwheat (U)

Eriogonum ordii S. Watson                                                                              Ord Buckwheat (U)

Eriogonum parvifolium var. paynei (Wolf ex Munz) Reveal                       Payne Dune Buckwheat (U, Type)

Eriogonum roseum Durand & Hilg.                                                                  Rose Buckwheat (U)

Eriogonum saxatile S. Watson                                                                         Rock Buckwheat (U)

Eriogonum spergulinum ssp. reddingianum (Jones) J.T. Howell              Spurry Buckwheat (R)

Eriogonum thurberi Torrey                                                                               Thurber’s Wild Buckwheat (R)

Eriogonum trichopes Torrey var. trichopes                                                   Little Trumpet (U)

Eriogonum umbellatum var. bahiiforme (T. & G.) Jepson                           Sulphur-flower Buckwheat (R)

Eriogonum umbellatum var. furcosum Reveal                                               Sulphur Buckwheat (R)

Eriogonum umbellatum var. subaridum S. Stokes                                        Sulphur Buckwheat (R)

Eriogonum vimineum Benth.                                                                             Wicker Buckwheat (R)

Eriogonum viridescens A. Heller                                                                      Green Buckwheat (U)

Eriogonum wrightii var. membranaceum Jeps.                                             Sheathed Wright Buckwheat (R)

Eriogonum wrightii var. trachygonum (Torr. ex Benth.) Jeps.                    Rough-node Bastardsage (R)

Scientific Name                                                                                                   Common Name

Eriophyllum confertiflorum var. tanacetiflorum (E. Greene) Jepson         Tansy-leaved Woolly Yarrow (R) CNPS 4.2

Eriophyllum jepsonii Greene                                                                             Jepson Woolly Yarrow (R)

Eriophyllum staechadifolium Lagasca                                                            Seaside Woolly Sunflower (U)

Eryngium vaseyi J. Coulter & Rose                                                                  Coyote Thistle or Button-celery (R)

Erysimum insulare Greene ssp. insulare                                                         Island Wallflower (U)

Erysimum insulare ssp. suffrutescens (Abrams) R.A. Price                          Island Wallflower (R)

Eschscholzia hypecoides Bentham                                                                  Gypsum Poppy (R)

Eschscholzia lemmonii Greene ssp. lemmonii                                               Lemmon Poppy (R) CNPS List 4

Eschscholzia minutiflora S. Watson                                                                               Tiny-flowered Poppy (R)

Eschscholzia ramosa (Greene) Greene                                                             Island Poppy (R)

Euphorbia palmeri S. Watson var. palmeri                                                   Wood Spurge (R)

Euphorbia spathulata Lam.                                                                              Spurge (R)

Festuca rubra L.                                                                                                  Red Fescue (R)

Fimbristylis thermalis S. Watson                                                                     Hot-Springs Fimbristylis (R)

Forestiera pubescens Nutt.                                                                               Desert Olive, Dwarf Swamp Privet (R)

Fraxinus velutina Torrey                                                                                   Velvet or Arizona Ash (R)

Fritillaria agrestis E. Greene                                                                            Stink Bells (R) CNPS List 4

Fritillaria biflora Lindley var. biflora                                                             Chocolate Lily, Mission Bells (U)

Fritillaria ojaiensis A. Davidson                                                                     Ojai Fritillary (R, Type) CNPS List 1B

Fritillaria pinetorum A. Davidson                                                                  Pine Fritillary (R)

Galium angustifolium ssp. foliosum (Hilend & Howell) Dempster & Stebb.            Channel Islands Bedstraw (R, Type)

Galium bifolium S. Watson                                                                               Low Mountain Bedstraw (R)

Galium californicum Hooker & Arnott ssp. californicum                           California Bedstraw (R)

Galium cliftonsmithii (Dempster) Dempster & Stebb.                                  Santa Barbara Bedstraw (R, CNPS 4)

Galium trifidum var. pacificum Wiegand                                                        Coastal Bedstraw (R)

Galium triflorum Michaux                                                                                 Sweet-scented Bedstraw (R)

Gaura coccinea Pursh                                                                                        Wild Honeysuckle, Linda Tarde (R)

Gayophytum diffusum ssp. parviflorum H. Lewis & J. Szweykowski         Diffuse Gayophytum (U)

Gayophytum heterozygum H. Lewis & J. Szweykowski                                Hybrid Gayophytum (R)

Gayophytum racemosum T. & G.                                                                      Black-foot Gayophytum (R)

Geranium californicum G. Jones & F. Jones                                                  California Geranium (R)

Geranium viscosissimum Fischer & C. Meyer                                                Sticky Cranesbill (R)

Gilia achilleifolia Benth. ssp. achilleifolia                                                   California or Yarrow-leaved Gilia (U)

Gilia achilleifolia Benth. ssp. multicaulis (Benth.) V. & A. Grant             Many-stemmed California Gilia (R)

Gilia aliquanta A. D. Grant & V. E. Grant                                                       Puff-calyx Gilia (R)

Gilia australis (Mason & A. Grant) V. Grant & A. Grant                             Southern Gilia (R)

Gilia austro-occidentalis (A.D. & V.E. Grant) A.D. & V.E.Grant                Southwestern Gilia (R)

Gilia brecciarum M.E. Jones ssp. brecciarum                                              Breccia Gilia (R)

Gilia brecciarum ssp. jacens (A. Grant & V. Grant) Day                              Purple-flowered Breccia Gilia (R)

Gilia capillaris Kellogg                                                                                     Miniature or Smooth-leaved Gilia (R)

Gilia interior (Mason & A. Grant) A. Grant                                                   Slender-flowered Gilia (R)

Gilia latiflora ssp. cuyamensis A. & V. Grant                                                Cuyama Gilia (U) CNPS List 4

Gilia latiflora ssp. davyi (Milliken) A. & V. Grant                                        Davy Broad-flowered Gilia (R)

Gilia latiflora (Gray) Gray ssp. latiflora                                                         Broad-flowered Gilia (R)

Gilia leptantha ssp. pinetorum A. & V. Grant                                               Gabriel Trumpet (U) CNPS List 4

Gilia malior A.G. Day & V.E. Grant                                                 Scrub Gilia (R)

Gilia minor A.D. Grant & V.E. Grant                                                                Little Gilia (U)

Gilia modocensis Eastwood                                                                              Modoc Gilia (R)

Gilia nevinii Gray                                                                                                Nevin Gilia (U)

Gilia ochroleuca ssp. exilis (Gray) A.& V. Grant                                          Volcanic Gilia (R)

Gilia ochroleuca M.E. Jones ssp. ochroleuca                                              Volcanic Gilia (R)

Gilia sinuata Benth.                                                                                           Sinuate Gilia (R)

Gilia splendens H. Mason & A. Grant ssp. splendens                                 Splendid Gilia (U)

Gilia tenuiflora Benth. ssp. tenuiflora                                                            Greater Yellowthroat Gilia (R)

Gilia tetrabreccia A. & V. Grant                                                                      Mount Piños Gilia (U)

Gilia transmontana (H. Mason & A. Grant) A. & V. Grant                          Desert Gilia (U)

Scientific Name                                                                                                   Common Name

Githopsis diffusa A. Gray ssp. diffusa                                                              Southern Bluecup (R)

Grindelia camporum var. bracteosum (J.T. Howell) M.A. Lane Bracted Gumplant (U)

Grindelia camporum E. Greene var. camporum                                             Great Valley Gumplant (R)

Grindelia hirsutula Hook. & Arn. var. hirsutula                                          Hirsute Gumplant (U, Type)

Grindelia stricta var. platyphylla (Greene) M.A. Lane                                Island Gumplant (R)

Grindelia Xlatifolia Kellogg ssp. latifolia                                                     Coastal Gumplant (R)

Gutierrezia sarothrae (Pursh) Britton & Rusby                                            Broom Snakeweed, Matchweed (U)

Hazardia detonsa (Greene) Greene                                                                  Island Goldenbush (U) CNPS 4

Helenium bigelovii Gray                                                                                    Bigelow Sneezeweed (U)

Helenium puberulum DC.                                                                                  Rosilla (U)

Helianthemum scoparium Nutt.                                                                        Peak Rushrose (U)

Helianthus gracilentus Gray                                                                             Wild Mountain or Slender Sunflower (R)

Hemizonella minima (Gray) Gray                                                                      Hemizonella (U)

Hesperevax sparsiflora (A. Gray) E. Greene var. sparsiflora                       Few-leaved Evax (R)

Hesperochiron californicus (Benth.) S. Watson                                           California Hesperochiron (R)

Hesperochiron pumilus (Griseb.) Porter                                                          Hesperochiron (R)

Hesperocnide tenella Torrey                                                                            Western Nettle (R)

Hesperoyucca whipplei ssp. percursa                                                            Our Lord’s Candle (R)

Heterotheca psammophila B. Wagenkn.                                                        Camphor Weed (R)

Heterotheca sessiliflora ssp. camphorata (Eastw.) Semple                         Camphor Golden-Aster (R)

Heuchera abramsii Rydb.                                                                                  Abrams Alumroot (R)

Heuchera cespitosa Eastw.                                                                                Alumroot (R)

Heuchera elegans Abrams                                                                                                Urn-flowered Alumroot (R)

Heuchera maxima Greene                                                                                  Island Alumroot (R)

Hieracium albiflorum Hooker                                                                           White-flowered Hawkweed (R)

Hieracium argutum Nuttall                                                                                Southern California Hawkweed (U)

Hieracium horridum Fries                                                                                 Shaggy or Woolly Hawkweed (R)

Hoffmannseggia glauca (Ortega) Eifert                                                           Pig-nut, Hog Potato (R)

Hoita orbicularis (Lindley) Rydb.                                                                    Round-leaved Hoita (R)

Hollisteria lanata S. Watson                                                                            Hollisteria (R)

Holocarpha heermannii (E. Greene) Keck                                                      Heermann Tarplant (R)

Holodiscus discolor (Pursh) Maxim.                                                                Oceanspray, Cream Bush (R)

Holodiscus microphyllus Rydb. var. macrophyllus                                      Rock Spiraea (R)

Hordeum brachyantherum Nevski ssp. brachyantherum                            Meadow Barley (U)

Hordeum depressum (Scribner & J.G. Smith) Rydb.                                       Low Barley (R)

Hordeum intercedens Nevski                                                                            Vernal Barley (U)

Horkelia cuneata Lindley ssp. cuneata                                                          Wedgeleaf Horkelia (R)

Horkelia cuneata ssp. puberula (Greene) Keck                                            Fuzzy Horkelia (R)

Horkelia rydbergii Elmer                                                                                   Rydberg Horkelia (U)

Hulsea heterochroma Gray                                                                                Red-rayed Hulsea (R)

Hulsea vestita ssp. gabrielensis Wilken                                                         San Gabriel Hulsea (R)

Hutchinsia procumbens (L.) Desv.                                                                   Desert Hutchinsia (U)

Hydrocotyle verticilata Thunb.                                                                        Marsh Pennywort (R)

Hypericum formosum var. scouleri (Hook.) J. Coulter                                   St. John’s Wort (R)

Imperata brevifolia Vasey                                                                                 Satintail (R)

Iris missouriensis Nuttall                                                                                    Western Blue Flag [Iris] (U)

Isocoma acradenia (E. Greene) E. Greene                                                       Desert Goldenbush (R)

Isolepis cernua (Vahl) Roemer & Schultes var. cernua                                Low Clubrush (R)

Isocoma menziesii var. sedoides (E. Greene) G. Nesom                 Coastal Goldenbush (U)

Isoëtes howellii Engelm. var. howellii                                                             Howell Quillwort (R)

Isoëtes howellii var. minima (A.A. Eaton) N.E. Pfeiffer                                Small Howell Quillwort (R)

Isoëtes nuttallii A. Braun                                                                                   Nuttall Quillwort (R)

Ivesia santolinoides A.Gray                                                                              Mousetail Ivesia (R)

Ivesia saxosa (Greene) B. Ertter                                                                         Five-finger Silverweed (R)

Jaumea carnosa (Less.) Gray                                                                            Fleshy Jaumea (U)

Jensia yosemitana (Parry ex A. Gray) B.G. Baldwin                                       Yosemite Tarplant (R)

Scientific Name                                                                                                   Common Name

Jepsonia malvifolia (Greene) Small                                                                  Island Jepsonia (R)

Juglans californica S. Watson var. californica                                            Southern California Black Walnut (U) CNPS List 4

Juncus acutus ssp. leopoldii (Parl.) Snogerup                                               Spiny Rush (U) CNPS List 4

Juncus arcticus ssp. vallicola (Rydb.) Lint                                                    Valley Baltic Rush (R)

Juncus balticus Willd. var. ater (Rydb.) Snogerup                                       Rocky Mountain Rush (R)

Juncus bufonius L. var. bufonius                                                                      Common Toad Rush (R)

Juncus bufonius var. occidentalis F.J. Hermann                                            Western Toad Rush (R)

Juncus confusus Cov.                                                                                         Colorado Rush (R)

Juncus effusus ssp. pacificus (Fern. & Wieg.) H.L. Lint                                Pacific Rush (U)

Juncus ensifolius Wikström var. ensifolius                                                     Swordleaf or Three-stamen Rush (R)

Juncus macrandrus Cov.                                                                                   Long-anthered Rush (R)

Juncus macrophyllus Cov.                                                                                Large-leaf Rush (U)

Juncus nevadensis S. Watson                                                                           Sierra Rush (R)

Juncus occidentalis (Coville) Wiegand                                                           Western Rush (R)

Juncus oxymeris Engelm.                                                                                   Iris-leaved or Pointed Rush (R)

Juncus patens E. Meyer                                                                                     Spreading Rush (R)

Juncus phaeocephalus var. paniculatus Engelm.                                         Brown-fruited Rush (R)

Juncus rugulosus Engelm.                                                                                 Wrinkled Rush (R)

Juncus textilis Buchenau                                                                                   Indian or Basket Rush (U)

Juncus torreyi Coville                                                                                         Torrey Rush (R)

Krascheninnikovia lanata (Pursh) A.D.J. Meeuse & Smit                          Winter Fat (R)

Lagophylla ramosissima Nutt. ssp. ramosissima                                          Branched Lagophylla, Common Hareleaf (R)

Lastarriaea coriacea (Goodman) Hoover                                                       Lastarriaea (R)

Lasthenia coronaria (Nutt.) Ornduff                                                               Crown-pappus Goldfields (R)

Lasthenia ferrisiae Ornduff                                                                               Ferris Goldfields (R)

Lasthenia glabrata ssp. coulteri (Gray) Ornduff                                          Rayless Goldfields (R)

Lathyrus vestitus ssp. bolanderi (S. Watson) C. Hitchc.                             White-petaled Peavine (R)

Lathyrus vestitus ssp. laetiflorus (Greene) Broich                                         Pacific Peavine (R)

Lathyrus vestitus ssp. laevicarpus Broich                                                      Pacific Peavine (U, Type)

Lavatera assurgentiflora Kellogg ssp. assurgentiflora                                               Malva Rose (R)

Layia glandulosa ssp. lutea Keck                                                                   Yellow Layia (U)

Layia glandulosa ssp. rosea Gray                                                                   Rose Layia (R, Type)

Layia heterotricha (DC.) Hook. & Arn.                                                           Pale-yellow Layia (R) CNPS List 1B

Layia pentachaeata ssp. albida Keck                                                            White Tidy Tips (R)

Layia platyglossa (Fischer & C. Meyer) A. Gray                                           Tidy Tips (U)

Lemna gibba L.                                                                                                    Gibbose Duckweed (R)

Lemna minor L.                                                                                                    Duckweed (R)

Lemna minuscula Herter                                                                                    Tiny Duckweed (R)

Lemna turionifera Landolt                                                                                 Duckweed (R)

Lemna valdiviana Philippi                                                                                 Big Duckweed (U)

Lepechinia calycina (Bentham) Epling                                                           Pitcher Sage (R)

Lepechinia fragrans (E. Greene) Epling                                                           Fragrant Pitcher Sage (R)

Lepechinia rossii S. Boyd & O. Mistretta                                                       Ross’ Pitcher Sage (R)

Lepidium campestre (L.) R. Br.                                                                          Peppergrass (R)

Lepidium dictyotum A. Gray var. dictyotum                                                   Veiny Peppergras (R)

Lepidium dictyotum var. acutidens A. Gray                                                   Short-toothed Peppergrass

Lepidium lasiocarpum Nutt. var. lasiocarpum                                              Hairy-pod Peppergrass (U)

Lepidium oblongum Small var. oblongum                                                      Oblong Peppergrass (U)

Lepidium strictum (S. Watson) Rattan                                                            Prostrate Peppergrass (R)

Lepidium virginicum var. pubescens (Greene) Thell.                                    Hairy Poorman's Peppergrass (R)

Lepidium virginicum var. robinsonii (Thell.) C.L. Hitchc.                           Robinson’s Poorman's Peppergrass (R, CNPS 1B.2)

Leptodactylon pungens ssp. hallii (Parish) H. Mason                                 Granite Prickly Phlox (R)

Leptodactylon pungens ssp. pulchriflorum (Brand) H. Mason                  Granite Prickly Phlox (U)

Leptosiphon androsaceus Bentham                                                                 Baby Tears (R)

Leptosiphon bicolor Nuttall                                                                              Bicolored Linanthus (R)

Leptosiphon breviculus (A. Gray) J.M. Porter & L.A. Johnson                  Short-stemmed Linanthus (R)

Scientific Name                                                                                                   Common Name

Leptosiphon ciliatus (Benth.) Jepson                                                              Whisker Brush (R)

Leptosiphon liniflorus (Bentham) J.M. Porter & L.A. Johnson                   Narrow Flaxflower (U)

Leptosiphon nudatus (E. Greene) J.M. Porter & L.A. Johnson                    Tehachapi Linanthus or Flaxflower (R)

Leptosiphon pygmaeus ssp. continentalis (Raven) Porter & Johnson      Continental Pygmy Linanthus (R)

Lessingia glandulifera var. peirsonii (J.T. Howell) Markos                        Peirson’s Lessingia (R) CNPS List 4

Lessingia pectinata var. tenuipes (J.T. Howell) Markos                              Sticky Lessingia (R)

Lessingia tenuis (Gray) Cov.                                                                             Spring Lessingia (U, Type) CNPS List 4

Lewisia pygmaea (A. Gray) Robinson                                                             Pygmy Bitterroot (R)

Lewisia rediviva ssp. minor (Rydb.) Munz                                                    Small Bitterroot (U)

Leymus cinereus A. Löve                                                                                   Cespitose Wildrye (R)

Leymus Xhansenii Scribner                                                                                Hansen’s Wildrye (R)

Lilium humboldtii ssp. ocellatum (Kellogg) Thorne                                    Ocellated Humboldt Lily (U) CNPS List 4

Lilium pardalinum Kellogg ssp. pardalinum                                                                Leopard Lily (R)

Limonium californicum (Boiss.) A.A. Heller                                                  Marsh Rosemary (R)

Limosella acaulis Sesse & Mocino                                                                 Tufted Mudwort (R)

Linanthus bigelovii (Gray) Greene                                                                   Bigelow Linanthus (R)

Linanthus dianthiflorus (Benth.) Greene                                                        Ground Pink (U)

Linanthus parryae (Gray) Greene                                                                     Parry Linanthus (R)

Linaria canadensis (L.) Dum.-Cours. var. canadensis                                  Toadflax (R)

Linaria canadensis (L.) Dum.-Cours. var. texana (Scheele) Pennell          Toadflax (U)

Linum lewisii Pursh                                                                                            Western Blue Flax (U)

Lipocarpha micrantha (M. Vahl.) G.C. Tucker                                               Tiny Lipocarpha (R)

Lithocarpus densiflorus (Hook. & Arn.) Rehder                                            Tanbark Oak (R)

Lithophragma bolanderi Gray                                                                          Bolander Star (R)

Lithophragma cymbalaria T. & G.                                                                   Mission Star (U)

Lithophragma heterophyllum (Hook. & Arn.) T. & G.                                 Hill Star (R)

Lithophragma parviflorum (Hook.) T. & G. var. parviflorum                      Prairie Star (R)

Lobelia dunnii var. serrata (Gray) McVaugh                                                 Rothrock (Ojai) Lobelia (Type Locality only)

Loeflingia squarrosa Nuttall var. squarrosa                                                  California Loeflingia (R)

Loeseliastrum schottii S. Timbrook                                                                  Schott Loeseliastrum (R)

Lomatium californicum (T. & G.) Mathias & Constance                              California Lomatium (R)

Lomatium caruifolium (H.& A.) J.M. Coult. & Rose var. caruifolium       Alkali Desertparsley (R)

Lomatium dissectum var. multifidum (T.& G.) Mathias & Constance        Carrotleaf Biscuitroot (R)

Lomatium insulare (Eastw.) Munz                                                                   San Nicolas Island Lomatium (R)

Lomatium lucidum (T. & G.) Jeps.                                                                    Shiny Lomatium (R)

Lomatium macrocarpum (T. & G.) J. Coulter & Rose                                    Large-fruited Lomatium (R)

Lomatium mohavense (Coult. & Rose) Coult. & Rose ssp. mohavense     Desert-parsley (U)

Lomatium parvifolium (Hook. & Arn.) Jeps.                                                  Small-leaved Lomatium (R)

Lomatium utriculatum (T. & G.) Coulter & Rose                                           Foothill Lomatium (U)

Lonicera interrupta Benth.                                                                               Chaparral Honeysuckle (U)

Lonicera subspicata Hooker & Arnott var. subspicata                                               Santa Ynez Mountains Honeysuckle (R)

Lotus argophyllus ssp. argenteus Dunkle                                                      Silver Deervetch (R)

Lotus argophyllus ssp. nivius (E. Greene) Ottley                                          Santa Cruz Island Silverhosackia (R)

Lotus crassifolius (Benth.) Greene var. crassifolius                                      Broad-leaved Hosackia (U)

Lotus dendroideus (Greene) Greene var. dendroideus                                  Island Broom (R)

Lotus dendroideus var. veatchii (Greene) Isley                                             San Miguel Island Deerweed (R)

Lotus hamatus Greene                                                                                        Grab Hosackia or Lotus (R)

Lotus heermanii (Durand & Hilg.) Greene var. heermanii                            Heerman Lotus or Hosackia (R)

Lotus heermanii var. orbicularis (Gray) Isley                                                Heerman Lotus (R)

Lotus junceus (Benth.) Greene                                                                           Lotus (R)

Lotus micranthus Benth.                                                                                    Tiny Lotus (R)

Lotus nevadensis (S. Watson) Greene var. davidsonii (Greene) Isley        Suphur-flowered Hosackia (U)

Lotus nevadensis (S. Watson) Greene var. nevadensis                                 Sierra Nevada Hosackia (R)

Lotus nuttallianus E. Greene                                                                             Nuttall’s Lotus (R)

Lotus oblongifolius (Benth.) Greene var. cupreus (Greene) Ottley             Stream Trefoil (R)

Lotus oblongifolius (Benth.) Greene var. oblongifolius                               Narrow-leaved Hosackia, Stream Trefoil (U)

Scientific Name                                                                                                   Common Name

Lotus scoparius var. brevialatus Ottley                                                          Deerweed (R)

Lotus stipularis (Benth.) Greene var. stipularis                                             Balsam Lotus (R)

Ludwigia palustris (L.) Elliot                                                                             Streamside Water Primrose (R)

Ludwigia peploides (Kunth) Raven ssp. peploides                                      Floating Seedbox (R)

Lupinus adsurgens E. Drew var. adsurgens                                                    Silky Lupine (R)

Lupinus adsurgens var. undulatus C.P. Smith                                                Wavyleaf Silky Lupine (R)

Lupinus agardhianus Heller                                                                              Lupine (R)

Lupinus albicaulis Hooker                                                                                                Whitestem Lupine (R)

Lupinus albifrons var. douglasii (Agardh) C.P. Smith                                  Island Silver Bush Lupine (R)

Lupinus andersonii S. Watson                                                                         Anderson Lupine (R)

Lupinus arboreus Sims                                                                                       Yellow Bush Lupine (U)

Lupinus benthamii Sims                                                                                     Spider Lupine (R)

Lupinus breweri Gray var. breweri                                                                  Brewer Mat Lupine (U)

Lupinus breweri var. bryoides C.P. Smith                                                       Alpine Brewer Lupine (U)

Lupinus chamissonis Eschsch.                                                                         Coastal Bush Lupine (R)

Lupinus concinnus spp. optatus D. Dunn                                                      Bajada Lupine (R)

Lupinus concinnus spp. orcutti (S. Watson) D. Dunn                                 Orcutt Bajada Lupine (R)

Lupinus excubitus M.E. Jones var. excubitus                                                                Grape Soda Lupine (U)

Lupinus excubitus var. austromontanus (A.A. Heller) C.P. Smith              Southern Mountain Bush Lupine (U)

Lupinus excubitus var. johnstonii C.P. Smith                                                 Johnston Bush Lupine (R)

Lupinus formosus var. robustus C.P. Smith                                                     Summer Bush Lupine (R)

Lupinus latifolius J. Agardh var. latifolius                                                     Broad-leaved Lupine (R)

Lupinus latifolius var. parishii C.P. Smith                                                      Parish Broad-leaved Lupine (U)

Lupinus lepidus var. confertus (Kellogg) C.P. Smith                                     Prairie Lupine (U)

Lupinus luteolus Kellogg                                                                                   Butter Lupine (U)

Lupinus microcarpus var. densiflorus (Benth) Jeps.                                     Densely Red-flowered Lupine (R)

Lupinus microcarpus var. horizontalus (A.A. Heller) Jeps.                        Prostrate Red-flowered Lupine (U, Type)

Lupinus nanus Benth.                                                                                         Small Lupine (R)

Lupinus polyphyllus Lindley var. burkei                                                        Large-leaved Lupine (R)

Lycium andersonii Gray                                                                                     Anderson Desert-thorn (R)

Lycium californicum Nuttall ex Gray                                                                California Desert-thorn (R)

Lycium verrucosum Eastwood                                                                          San Nicolas Island Desert-thorn (R, Type)

Lythrum californicum T. & G.                                                                           California Loosestrife (R)

Madia elegans ssp. vernalis Keck                                                                   Vernal Tarplant or Madia (R)

Madia elegans ssp. wheeleri (Gray) Keck                                                      Wheeler Tarplant or Madia (R)

Madia exigua (Smith) A. Gray                                                                          Small or Threadstem Tarplant or Madia (R)

Madia sativa Molina                                                                                          Coast Tarplant (R)

Maianthermum racemosum ssp. amplexicaule (Nutt.) LaFrankie              False Solomon’s Seal, Wild Lily of the Valley (R)

Maianthermum stellatum (L.) Link                                                                   False Solomon’s Seal, Wild Lily of the Valley (R)

Malacothamnus fasciculatus var. laxiflorus (Gray) Kearney                      Lax-flowered Bushmallow (R)

Malacothamnus fremontii (Torrey ex Gray) Torrey ex. Greene                    Fremont Bushmallow (U)

Malacothamnus marrubioides (D. & H.) Greene                                           Pink-flowered Bush[Globe]mallow (U)

Malacothamnus nuttallii Abrams                                                                    Nuttall Bushmallow (Type)

Malacothrix californica DC. var. californica                                                                California Cliff-aster (U)

Malacothrix clevelandii Gray                                                                           Cleveland Cliff-aster (R)

Malacothrix floccifera (DC.) Blake                                                                  Woolly or Flocose Dandelion (R)

Malacothrix foliosa ssp. crispifolia W.S. Davis                                           Leafy Cliff-aster (R)

Malacothrix foliosa Gray ssp. foliosa                                                             Leafy Cliff-aster (R)

Malacothrix foliosa ssp. polycephala W.S. David                                       Many-headed Leafy Cliff-aster (R)

Malacothrix glabrata A. Gray                                                                          Desert Dandelion (R)

Malacothrix incana (Nuttall) Torrey & A. Gray var. incana                       Dunedelion (U) CNPS List 4

Malacothrix junakii W.S. Davis                                                                      Junak Dandelion (R, Type)

Malacothrix phaeocarpa W.S. Davis                                                             Brown-fruited Dandelion (R) CNPS List 4

Malacothrix saxatilis (Nuttall) T. & G. var. saxatilis                                    Cliff-aster (U)

Malacothrix saxatilis var. altissima (Greene) Ferris                                     Cliff-aster (R)

Malacothrix saxatilis var. commutata Ferris                                                 Cliff-aster (U)

Scientific Name                                                                                                   Common Name

Malacothrix saxatilis var. implicata (Eastw.) Hall                                        Implicated Cliff-aster (U, Type)

Malacothrix similis Davis & Raven                                                                 Mexican Cliff-aster (R)

Malacothrix squalida Greene                                                                           Island Dandelion (R)

Malvella leprosa (Ortega) Krapov                                                                   Alkali-mallow, White-Weed (U)

Marah macrocarpus var. major (Dunn) Stocking                                          Island Man-root (R)

Marsilea vestita Hooker & Greville ssp. vestita                                             Hairy Pepperwort, Clover Fern (R)

Meconella denticulata E. Greene                                                                     Tiny Poppy (R)

Melica californica Scribner var. californica                                                  California Melic Grass (R)

Melica frutescens Scribner                                                                                 Melic Grass (R)

Melica stricta Bolander var. albicaulis                                                           Whitestem Rock Melic Grass (R)

Melica stricta Bolander var. stricta                                                                 Nodding or Rock Melic Grass (R)

Mentha arvensis L.                                                                                              Field Mint (R)

Mentzelia affinis Greene                                                                                     Stickleaf (R)

Mentzelia albicaulis (Hook.) T. & G.                                                               Whitestem Stickleaf (R)

Mentzelia congesta (Nuttall) T. & G. var. congesta                                      Congested Stickleaf (U)

Mentzelia congesta var. davidsoniana (Abrams) J.F. Macbr.                     Ventana Stickleaf (R)

Mentzelia dispersa S. Watson                                                                          Scattered Stickleaf (R)

Mentzelia gracilenta T. & G.                                                                            Slender Stickleaf (R)

Mentzelia micrantha (Hook. & Arnott) T. & G.                                             Tiny-flowered Stickleaf (U)

Mentzelia pectinata Kellogg                                                                             Stickleaf (R)

Mentzelia veatchiana Kellogg                                                                          Veatch Stickleaf (R)

Micropus californicus Fischer & C. Meyer var. californicus                      Slender Cottonweed (U)

Microseris douglasii (DC.) Schultz-Bip. ssp. douglasii                               Douglas Microseris (R)

Microseris douglasii ssp. tenella (A. Gray) Chambers                                                Slender Douglas Microseris (R)

Microseris elegans A. Gray                                                                               Elegant Microseris (R)

Mimulus androsaceus Greene                                                                           Naked Sepal Monkeyflower (R)

Mimulus aurantiacus var. parviflorus (Greene) D.M. Thompson              Bush Monkeyflower (R)

Mimulus bigelovii (Gray) Gray var. bigelovii                                                 Bigelow Monkeyflower (R)

Mimulus bolanderi Gray                                                                                    Bolander Monkeyflower (R)

Mimulus breweri (E. Greene) Cov.                                                                    Brewer Monkeyflower (R)

Mimulus congdonii Robinson                                                                          Congdon Monkeyflower (R)

Mimulus constrictus (A.L. Grant) Pennell                                                       Narrow-throated Monkeyflower (U)

Mimulus flemingii Munz                                                                                    Island Bush Monkeyflower (R)

Mimulus floribundus Lindley                                                                            Floriferous Monkeyflower (U)

Mimulus fremontii (Benth.) Gray var. fremontii                                             Fremont Monkeyflower (U)

Mimulus johnstonii A.L. Grant                                                                          Johnston Monkeyflower (R)

Mimulus longiflorus var. rutilus A. Grant                                                       Red Sticky Bush Monkeyflower (R)

Mimulus moschatus var. longiflorus A. Gray                                                 Musk Monkeyflower (R)

Mimulus parishii E. Greene                                                                               Parish’s Monkeyflower (R)

Mimulus primuloides Benth. var. primuloides                                               Primrose Monkeyflower (R)

Mimulus  puniceus Nuttall                                                                                 Red Bush Monkeyflower (R)

Mimulus rattanii Gray                                                                                        Rattan’s Monkeyflower (R)

Mimulus rubellus Gray                                                                                       Little Redstem Monkeyflower (R)

Mimulus suksdorfii Gray                                                                                    Suksdorf Monkeyflower (R)

Mimulus tilingii Regel                                                                                        Creeping Monkeyflower (R)

Minuartia douglasii (Fenzl ex T. & G.) Mattf.                                                Douglas Sandwort (R)

Minuartia pusilla (S. Watson) Mattf.                                                             Sandwort (R)

Mirabilis multiflora var. pubescens S. Watson                                             Froebel Four O’Clock (R)

Monanthochloe littoralis Engelm.                                                                   Shoregrass (R)

Monardella breweri Gray                                                                                  Brewer Coyote Mint (U)

Monardella hypoleuca Gray ssp. hypoleuca                                                 White-veined Coyote Mint (R)

Monardella linioides ssp. oblonga (Greene) Abrams                                  Flax-leaved Horsemint (R) CNPS List 1B

Monardella undulata Benth.                                                                            Curly-leaved Horsemint (R)

Monolepis nuttalliana (Schultes) E. Greene                                                  Nuttall Monolepis, Poverty Weed (R)

Monolopia lanceolata Nuttall                                                                          Lanceleaf Hilltop Daisy (R)

Monolopia major DC.                                                                                         Cupped Daisy (R)

Scientific Name                                                                                                   Common Name

Montia chamissoi (Ledeb. Ex Spreng.) Greene                                               Toad-Lily (R)

Mucronea californica Benth. var. californica                                               California Spineflower (R)

Mucronea perfoliata (Gray) A.A. Heller var. perfoliata                               Perfoliate Spineflower (R)

Muhlenbergia andina (Nuttall) A. Hitchc.                                                     Foxtail Muhly (R)

Muhlenbergia asperifolia (Nees & Meyen) Parodi                                      Scratchgrass (U)

Muhlenbergia richardsonis (Trin.) Rydberg                                                  Mat Muhly (R)

Muhlenbergia utilis (Torrey) A. Hitchc.                                                         Aparejo Grass (R)

Muilla maritima (Torrey) S. Watson                                                               Common Muilla (U)

Myosurus minimus L.                                                                                          Common Mousetails (R)

Myrica californica Chamisso                                                                            California Wax-Myrtle, Pacific Bayberry (R)

Myriophyllum hippuroides Torrey & A. Gray                                               Western Milfoil (R)

Najas guadalupensis (Sprengel) Magnus                                                       Common Water-nymph, Southern Naiad (R)

Nama californicum (Gray) J.D. Bacon                                                             Lemmon California Waterleaf (U)

Navarretia atractyloides (Benth.) Hook. & Arn.                                           Hollyleaf Skunkweed (R)

Navarretia hamata E. Greene ssp. hamata                                                     Navarretia (R)

Navarretia ojaiensis Elvin, J.M. Porter & L.A. Johnson                              Ojai Navarretia (U) CNPS List 1B.1

Navarretia mellita E. Greene                                                                             Sticky Navarretia (R)

Navarretia peninsularis Greene                                                                       Southern California Navarretia (R)

Navarretia squarrosa (Eschsch.) Hook. & Arn.                                            Downy Navarretia (R)

Nemacladus capillaris Greene                                                                          Common Nemacladus (R)

Nemacladus glandulerus var. occidentalis McVaugh                                 Western Sticky Nemacladus (R)

Nemacladus gracilis Eastw.                                                                              Slender Nemacladus (R)

Nemacladus ramosissimus Nuttall                                                                    Nuttall’s Nemacladus (R)

Nemacladus secundiflorus G.T. Robbins                                                        Secund Nemacladus (R)

Nemacladus sigmoideus G.T. Robbins                                                            Thread Stem (R)

Nemophila menziesii var. integrifolia Parish                                                 Baby Blue-eyes (R)

Nemophila parviflora Douglas ex Bentham var. parviflora                        Smallflower Nemophila (R)

Nemophila pulchella var. fremontii (A.D.E. Elmer) Constance                   Fremont Baby Blue-eyes (R)

Nicotiana attenuata Torrey                                                                              Coyote Tobacco (U)

Nicotiana clevelandii A. Gray                                                                          Cleveland Indian Tobacco (R)

Nicotiana quadrivalis Pursh var. quadrivalis                                                               Indian Tobacco (R)

Nicotiana quadrivalis Pursh var. wallacei (Gray) Mansf.                          Wallace’s Indian Tobacco (R)

Nolina cismontana Dice                                                                                    Chaparral Bear-grass (R) CNPS List 1B

Notholeana californica D.C. Eaton                                                                                 California Cloak Fern (R)

Oenothera deltoides ssp. cognata (Jepson) Klein                                        Birdcage Evening-primrose, Devil’s Lantern (R)

Oenothera elata ssp. hookeri (Torrey & A. Gray) W. Dietr.                       Hooker Coast Evening Primrose (R)

Oenothera longissima ssp. clutei (Nelson) Munz                                         Evening Primrose (R)

Oligomeris linifolia (M. Vahl) J.F. Macbr.                                                      Narrowleaf Oligomeris (U)

Opuntia basilaris Engelm. & J. Bigelow var. basilaris                                 Beavertail Cactus (R)

Opuntia littoralis (Engelm.) Cockerell XO. oricola Philbr.                           Coastal-Round-pad Prickly Pear Hybrid (R)

Opuntia oricola Philbr.                                                                                      Round-pad Prickly Pear (U)

Opuntia parryi Engelm.                                                                                      Cane or Snake Cholla (R)

Opuntia prolifera Engelm.                                                                                 Coastal Cholla (R)

Opuntia Xvaseyi (J. Coulter) Britton & Rose (O. littoralis X phaeacantha)     Mesa Prickly Pear (R)

Orcuttia californica Vasey                                                                                                California Orcutt Grass (R)

Orobanche bulbosa (Gray) G. Beck                                                                  Chamise Broom-rape (U)

Orobanche californica ssp. feudgei (Munz) Heckard                                  California Sagebrush Broom-rape (R)

Orobanche fasciculata Nuttall                                                                          Clustered Broom-rape (U)

Orobanche parishii ssp. brachyloba Heckard                                              Short-lobed Broom-rape (R)

Orobanche parishii (Jeps.) Heckard ssp. parishii                                        Parish Broom-rape (R)

Orobanche uniflora L.                                                                                        Naked Broomrape (R)

Orobanche vallicola (Jepson) Heckard                                                          Hillside Broomrape (R)

Orobanche valida Jeps. ssp. valida                                                                                Rock Creek Broom-rape (R)

Osmorhiza chilensis H.& A.                                                                              Mountain Sweetroot (R)

Oxalis albicans ssp. californica (Abrams) G. Eiten                                      California White Wood Sorrel (R)

Oxalis albicans ssp. pilosa (Nuttall) G. Eiten                                                 Hairy White Wood Sorrel (R)

Scientific Name                                                                                                   Common Name

Oxytheca caryphylloides Parry                                                                         Chickweed Oxytheca (R) CNPS List 4

Oxytheca parishii var. abramsii (McGregor) Munz                                      Abrams Oxytheca (R, Type) CNPS List 1B

Oxytheca perfoliata T. & G.                                                                              Perfoliate Oxytheca (R)

Oxytheca trilobata A. Gray                                                                               Three-lobed Spineflower (R)

Packera breweri (Burtt Davy) W.A. Weber & Löve                                    Brewer Butterweed or Groundsel (U)

Panicum capillare ssp. hillmanii (Chase) Freckmann & Lelong                Hillman Witchgrass (U)

Papaver californicum Gray                                                                               Wind or Fire Poppy (R)

Parietaria hespera var. californica B.D. Hinton                                           California Pellitory (R)

Parietaria hespera B.D. Hinton var. hespera                                                 Southwest Pellitory (U)

Parietaria pensylvanica Muhlenberg ex Wildenow                                     Pennsylvania Pellitory (R)

Parishella californica A. Gray                                                                         Parishella (R)

Parthenocissus vitaea (Knerr) Hitchc.                                                             Woodbine (R)

Paspalum distichum L.                                                                                       Joint Dallis Grass or Knotgrass (R)

Pectocarya heterocarpa I.M. Johnston                                                          Two-faced Pectocarya (R)

Pectocarya linearis ssp. ferocula (I.M. Johnston) Thorne                         Linear Pectocarya (U)

Pectocarya penicillata (Hook. & Arn.) A. DC.                                              Winged Pectocarya (R)

Pectocarya setosa Gray                                                                                      Setose Pectocarya (U)

Pedicularis densiflora Hook.                                                                            Indian Warrior (R)

Pedicularis semibarbata Gray                                                                          Pine-woods Lousewort (U)

Pediomelum castoreum (S. Watson) Rydb.                                                    Desert Indian Breadroot (R)

Pellaea mucronata var. californica (Lemmon) Munz & I.M. Johnston    California Birdsfoot Cliffbrake or Fern (R)

Penstemon grinnellii Eastwood var. grinnellii                                             Grinnell Beardtongue (U)

Penstemon heterophyllus var. australis Munz & I.M. Johnston                                Southern Mountain Penstemon (R)

Penstemon laetus Gray var. laetus                                                                   Gay Penstemon (R)

Penstemon speciosus Lindley                                                                            Showy Beardtongue (R)

Pentachaeta fragilis Brandegee                                                                       Fragile Pentachaeta (R)

Pentachaeta lyonii Gray                                                                                    Lyon’s Pentachaeta (R) Listed Endangered

Perideridia gairdneri (Hook. & Arn.) Mathias ssp. gairdneri                   Gairdner Yampah (R)

Perideridia parishii ssp. latifolia (Gray) Chuang & Constance                                Parish Yampah (R)

Perideridia pringlei (J.M. Coulter & Rose) A. Nelson & J.F. Macbr.        Adobe or Pringle Yampah (U) CNPS List 4

Perityle emoryi Torrey                                                                                       Rock Daisy (U)

Phacelia affinis Gray var. affinis                                                                       Phacelia (R)

Phacelia austromontana J.T. Howell                                                              Low Phacelia (R)

Phacelia bicolor Torrey ex S. Watsion                                                           Bicolored Phacelia (R)

Phacelia cicutaria E. Greene var. cicutaria                                                   Caterpillar Phacelia (U)

Phacelia cicutaria var. hubbyi (J.F. Macbr.) J.T. Howell                             Hubby Caterpillar Phacelia (U)

Phacelia ciliata Benth. var. ciliata                                                                 Ciliate Phacelia (U)

Phacelia cinerea Eastw.                                                                                    Ashy Phacelia (R, Type) CNPS 1A

Phacelia exilis (Gray) G.J. Lee                                                                          Transverse Range Phacelia (R) CNPS 4.3

Phacelia grisea Gray                                                                                          White-flowered Phacelia (R)

Phacelia humilis var. dudleyi J. Howell                                                          Dudley Phacelia (R)

Phacelia imbricata ssp. patula (Brand) Heckard                                          Mountain Phacelia (R)

Phacelia minor (Harvey) Thellung                                                                  Wild Canterberry Bell (R)

Phacelia mohavensis A. Gray                                                                           Mojave Phacelia (R) CNPS 4.3

Phacelia mutabilis Greene                                                                                                Changeable Phacelia (R)

Phacelia oreopola Heckard ssp. oreopela                                                     Mountain Phacelia (R)

Phacelia ramosissima var. austrolittoralis Munz                                         South Coast Branching Phacelia (R) CNPS 4.3

Phacelia ramosissima var. latifolia (Torrey) Cronq.                                    Branching Phacelia (U)

Phacelia rattanii A. Gray                                                                                  Brand Phacelia (R)

Phacelia viscida var. albiflora (Nuttall) A. Gray                                           White-flowered Viscid Phacelia (R)

Phalaris lemmonii Vasey                                                                                   Lemmon Canarygrass (R)

Phlox austromontana Coville                                                                           Spreading Phlox (R)

Phlox caespitosa Nuttall                                                                                    Rigid Mat Phlox (R)

Phlox diffusa Benth.                                                                                            Mat Phlox (R)

Phlox hoodii ssp. canescens (T. & G.) Wherry                                              Fuzzy Hood Phlox (R)

Pholistoma membranaceum (Benth.) Constance                                           White Fiesta Flower (R)

Scientific Name                                                                                                   Common Name

Phoradendron pauciflorum Torrey                                                                 Few-flowered Mistletoe (R)

Phragmites australis (Cav.) Steudel                                                                                Common Reed (R)

Phyla nodiflora (L.) E. Greene var. nodiflora                                 Common Frog-fruit (R)

Phyllospadix scouleri Hook.                                                                             Scouler Surf-grass (R)

Phyllospadix torreyi S. Watson                                                                       Torrey Surf-grass (R)

Pickeringia montana Nutt. var. montana                                                       Chaparral Pea (R)

Pilularia americana A. Braun                                                                          American Pillwort (R)

Pinus coulteri D. Don                                                                                         Coulter Pine (R)

Pinus flexilis E. James                                                                                         Limber Pine (R)

Pinus sabiniana Douglas                                                                                  Foothill or Gray Pine (R)

Piperia elongata Rydb.                                                                                     Dense-flowered Rein Orchid (R)

Piperia michaelii (Greene) Rydb.                                                                     Michael Piperia (R) CNPS 4.2

Piperia unalascensis (Spreng.) Rydb                                                              Slender-spire Orchid (R)

Plagiobothrys acanthocarpus (Piper) I.M. Johnston                                   Adobe Popcornflower (R)

Plagiobothrys arizonicus (Gray) Gray                                                             Arizona Popcornflower (R)

Plagiobothrys canescens Benth.                                                                      Valley or Bracted Popcornflower (R)

Plagiobothrys collinus var. fulvescens (I.M. Johnston) Higgins                                Popcornflower (R)

Plagiobothrys collinus var. gracilis (A. Gray) Higgins                               Slender California Popcornflower (R)

Plagiobothrys hispidulus (E. Greene) I.M. Johnston                                    Hispid Popcornflower (R)

Plagiobothrys tenellus (Nuttall) A. Gray                                                        Slender Popcornflower (R)

Plagiobothrys undulatus (Piper) I.M. Johnston                                            Undulate Popcornflower (R)

Plantago elongata Pursh                                                                                  Coastal Plantain (R)

Plantago patagonica Jacq.                                                                                               Patagonia Plantain (R)

Plantago pusilla Nuttall                                                                                    Plantain (R)

Platanthera leucostachys Lindley                                                                   White-flowered Bog-Orchid (R)

Platanthera sparsiflora (S. Watson) Schltr.                                                   Few-flowered Rein Orchid (R)

Platystemon californicus Benth. var. californicus                                        Cream Cups (U)

Plectritis ciliosa ssp. insignis (Suksd.) D. Morey                                         Petite Long-spurred Plectritis (R)

Plectritis macrocera Torrey & A. Gray                                                           White Plectritis (R)

Pluchea odorata (L.) Cass.                                                                                Saltmarsh Fleabane (U)

Pluchea sericea (Nutt.) Coville                                                                         Arrow Weed (R)

Poa secunda ssp. juncifolia (Scribner) R. Soreng                                         Rush Bluegrass (R)

Polemonium micranthum Benth.                                                                      Phlox (U)

Polycarpon depressum Nutt.                                                                             California Allseed (R)

Polygala cornuta var. fishiae (C. Parry) Jeps.                                                Fish Milkwort (U) CNPS List 4

Polygonum amphibium var. emersum Michx.                                                 Kelp, Water-Smartweed (R)

Polygonum douglasii ssp. johnstonii (Munz) J. Hickman                           Sawatch Knotweed (R)

Polygonum hydropiperoides Michaux                                                            Mild Water Pepper, Water Smartweed (R)

Polygonum lapathifolium L.                                                                             Willow Weed (U)

Polygonum polygaloides ssp. kelloggii (Greene) J. Hickman                     Kellogg Knotweed (R)

Polygonum punctatum Elliott                                                                            Dotted Smartweed (U)

Polygonum sawatchense Small ssp. sawatchense                                         Sawatch Smartweed (R)

Polypodium hesperium Maxon                                                                         Western Polypody (R)

Polystichum imbricans ssp. curtum (Ewan) D.H. Wagner                           Imbricate Sword Fern (R)

Polystichum imbricans (D.C. Eaton) D.H. Wagner ssp. imbricans            Imbricate Sword Fern (R)

Populus balsamifera ssp. trichocarpa (T. & G.) Brayshaw                         Black Cottonwood (Type)

Populus fremontii Wats. XP. balsamifera ssp. trichocarpa (T. & G.) Brayshaw     Hybrid Fremont Cottonwood (R)

Potamogeton foliosus Raf. var. foliosus                                                          Leafy Pondweed (R)

Potamogeton nodosus Poiret                                                                            Long-leaved Pondweed (R)

Potamogeton pectinatus L.                                                                               Fennel-leaf Pondweed (R)

Potentilla anserina ssp. pacifica (Howell) Rousi                                         Pacific Coast Cinquifoil or Silverweed (R)

Potentilla biennis Greene                                                                                  Biennial Cinquifoil (R)

Potentilla glandulosa Lindley ssp. glandulosa                                            Sticky Cinquifoil (U)

Potentilla glandulosa ssp. nevadensis (S. Watson) Keck                          Sierra Nevada Sticky Cinquifoil (R)

Potentilla glandulosa ssp. reflexa (Greene) Keck                                        Greene Cinquifoil (R)

Potentilla gracilis var. elmeri (Rydb.) Jeps.                                                  Elmer Slender Cinquifoil (R, Type)

Scientific Name                                                                                                   Common Name

Prunus emarginata (Hooker) Walp.                                                                 Bitter Cherry (R)

Prunus ilicifolia ssp. lyonii (Eastw.) P. Raven                                              Catalina Cherry (R)

Pseudognaphalium beneolens (A. Gray) Anderberg                                    Coastal Everlasting (U)

Pseudognaphalium leucocephalum (A. Davidson) Anderberg                 Whiteleaf or Sonora Everlasting (R) CNPS 2.2

Pseudognaphalium ramosissimum (Nutt.) Anderberg                                 Pink Everlasting (R)

Pseudostellaria jamesiana (Torrey) W.A. Weber & R.I. Hartman             False Chickweed (R)

Psilocarphus brevissimus Nutt. var. brevissimus                                          Woolly Marbles (R)

Psilocarphus tenellus var. globiferus (DC.) Morefield                                 Round Woolly Marbles (R)

Pteridium aquilinum var. pubescens L. Underw.                                           Western Bracken [Fern] (U)

Purshia tridentata var. glandulosa (Curran) M.E. Jones                             Antelope Bush (U)

Pyrola picta Smith                                                                                              White-veined Wintergreen (R)

Pyrrocoma racemosa var. paniculata (Nutt.) J. Kartesz & K. Gandhi       Pyrrocoma (R)

Quercus douglasii H. & A.                                                                                Blue Oak (R)

Quercus dumosa Nutt.                                                                                        Nuttall or Coastal Sage Scrub Oak (R) CNPS 1B

Quercus palmeri Engelm.                                                                                   Palmer Oak (R)

Quercus tomentella Engelm.                                                                              Channel Island Oak (R)

Quercus turbinella  Greene ssp. turbinella                                                    Sonoran Scrub Oak (R)

Quercus wislizenii ssp. frutescens (Engelm.) E. Murray                               Shrubby Interior Live Oak (U)

Quercus Xalvordiana Eastwood (Q. douglasii XQ. john-tuckeri)                    Alvord Oak (R)

Quercus Xmacdonaldii Greene                                                                         MacDonald Oak (R)

Ranunculus californicus Bentham var. californicus                                     California Buttercup (U)

Ranunculus cymbalaria Pursh                                                                         Desert Buttercup (U)

Ranunculus hebecarpus Hooker & Arnott                                                     Hebe-fruited Buttercup (R)

Rhamnus tomentella ssp. cuspidata (Greene) Sawyer                                  Cuspid Hoary Coffeeberry (R)

Rhus integrifolia (Nutt.) Brewer & S. Watson XR. ovata S. Watson         Lemonade Berry-Sugar Bush Hybrid (R)

Rhus trilobata var. malacophylla (E. Greene) Jepson                                  Woolly Skunkbrush (U)

Ribes amarum McClatchie var. amarum                                                          Bitter Gooseberry (R)

Ribes amarum var. hoffmannii Munz                                                               Hoffmann’s Bitter Gooseberry (R, CNPS 3)

Ribes aureum var. gracillimum (Cov. & Britton) Jeps.                                 Slender Golden Currant (R)

Ribes californicum Hooker & Arnott var. californicum                               Hillside Gooseberry (R)

Ribes californicum var. hesperium (McClatchie) Jeps.                                 Southern Calif. Gooseberry (U)

Ribes cereum Douglas var. cereum                                                                  Wax Currant (U)

Ribes indecorum Eastw.                                                                                     White-flowered Currant (R)

Ribes montigenum McClatchie                                                                         Mountain Gooseberry (R)

Ribes nevadense Kellogg                                                                                   Mountain Pink Currant (R)

Ribes quercetorum Greene                                                                                 Oak Gooseberry (R)

Ribes roezlii Regel var. roezlii                                                                          Sierra Gooseberry (U)

Ribes velutinum Greene                                                                                      Plateau Gooseberry (R)

Rigiopappus leptocladus Gray                                                                         Rigiopappus (U)

Romneya coulteri Harvey                                                                                  Coulter Matilija Poppy (R) CNPS List 4

Rorippa palustris var. occidentalis (S. Watson) Rollins                             Western Riparian Yellow-cress (R)

Rosa woodsii var. ultramontana (S. Watson) Jeps.                                      Interior Wild Rose (R)

Rumex hymenosepalus Torrey                                                                          Wild Rhubarb, Canaigre (R)

Rumex maritimus L.                                                                                             Golden Dock (R)

Rumex salicifolius var. crassus (Rech. f.) J. Howell                                       Willow Dock (R)

Rupertia physodes (Hook.) Grimes                                                                   Scurf-pea (R)

Ruppia cirrhosa (Petagna) Grande                                                                   Spiral Wigeon-grass or Ditch-grass (R)

Ruppia maritima L.                                                                                             Wigeon-grass, Ditch-grass (R)

Sagina apetala L. ssp. apetala                                                                        Dwarf Pearlwort (R)

Sagina decumbens ssp. occidentalis (S. Wats.) G. Crow                             Western Pearlwort (R)

Sagina saginoides (L.) H. Karst.                                                                       Sagina, Arctic Pearlwort (R)

Sagittaria sanfordii Greene                                                                               Sanford Arrow-head (R) CNPS List 1B

Salicornia bigelovii Torrey                                                                              Bigelow Pickleweed (R)

Salicornia depressa Standley                                                                           Pickleweed (R)

Salix gooddingii C. Ball                                                                                     Goodding Black Willow (R)

Salix macrostachya var. leucodendroides Rowlee                                       Sandbar Willow (U)

Scientific Name                                                                                                   Common Name

Salix hindsiana var. parishiana (Rowlee) C. Ball                                          Sandbar Willow (R, Type)

Salix lasiolepis var. bigelovii (Torrey) Bebb.                                                                Bigelow Arroyo Willow (R)

Salvia carduacea Benth.                                                                                   Thistle Sage (R)

Salvia dorrii var. pilosa (Gray) Strachan & Reveal                                       Pilose Desert Sage (R)

Samolus parviflorus Raf.                                                                                    Water-pimpernel (R)

Sanicula bipinnata Hooker & Arnott                                                             Poison Sanicle (U)

Sanicula bipinnatafida Hooker                                                                        Purple Sanicle (R)

Sanicula graveolens Peopp. ex DC.                                                                 Sanicle (R)

Sanicula tuberosa Torrey                                                                                  Tuberose Sanicle (R)

Sarcocornia pacifica (Standley) A.J. Scott [Salicornia virginica L.]       Pacific Pickleweed or Swampfire (R)

Sarcodes sanguinea Torrey                                                                              Snow Plant (U)

Satureja douglasii (Benth.) Briq.                                                                      Yerba Buena (R)

Satureja mimuloides (Bentham) Briq.                                                              Monkeyflower Yerba Buena (R)

Saussurea americana D. Eaton                                                                         American Sawwort (R)

Saxifraga californica Greene                                                                            California Saxifrage (R)

Schoenoplectus acutus var. occidentalis (S. Watson) S.G. Smith              Viscid Tule (R)

Schoenoplectus californicus (C. Meyer) Soják, Čas. Nár.                            California Bulrush (R)

Schoenoplectus pungens (Vahl) Palla                                                              Common Threesquare (U)

Schoenoplectus saximontanus (Fern.) J. Raynal                                            Rocky Mountain Bulrush (R)

Schoenoplectus tabernaemontani (C. Gmelin) Palla                                     Soft-stem Bulrush (R)

Scirpus microcarpus J. Presl & C. Presl                                                           Small-fruited Bulrush (U)

Scrophularia californica ssp. floribunda (E. Greene) Shaw                       Many-flowered Figwort (R)

Scutellaria siphocampyloides Vatke                                                               Skullcap (U)

Scutellaria tuberosa Benth.                                                                              Danny Skullcap (U)

Senecio aphanactis Greene                                                                               Rayless Ragwort (R)

Senecio flaccidus var. monoensis (Greene) B.L.Turner & T.M.Barkley     Mono Butterweed (R)

Setaria gracilis Kunth                                                                                       Knotroot Bristlegrass (R)

Shepheria argentea Nutt.                                                                                  Buffalo Berry, Silver Buffaloberry (U)

Sidalcea malviflora ssp. californica (T. & G.) C.L. Hitchc.                         California Globemallow (U)

Sidalcea malviflora ssp. dolosa C.L. Hitchc.                                                 Dwarf Globemallow or Checkerbloom (R)

Sidalcea neomexicana Gray                                                                              Salt Spring Checkermallow (R) CNPS List 2

Sidalcea pedata Gray                                                                                         Bird-footed Checkerbloom (R)

Silene antirrhina L.                                                                                            Snapdragon Campion, Catchfly (U)

Silene bernardina S. Watson                                                                           Palmer Campion (R)

Silene californica Durand                                                                                 California Indian Pink (R)

Silene lemmonii S. Watson                                                                                               Lemmon Campion or Catchfly (R)

Silene multinerva S. Watson                                                                            Many-veined Campion (U)

Solanum parishii A.A. Heller                                                                            Parish Nightshade (R)

Solanum umbelliferum Eschsch.                                                                      Blue Witch (U)

Solidago confinis Gray                                                                                       Southern Goldenrod (U)

Solidago guiradonis Gray                                                                                 Guirado Goldenrod (R)

Spergularia macrotheca var. leucantha (E. Greene) Robinson                  White Large[-flowered] Sandspurrey (R)

Spergularia macrotheca (Hornem.) Heynh. var. macrotheca                     Large[-flowered] Sandspurrey (R)

Spergularia marina (L.) Griseb.                                                                        Saltmarsh Sandspurrey (R)

Sphenosciadium capitellatum Gray                                                                 Ranger Buttons, Swamp White Heads (R)

Sporobolis airoides (Torey) Torrey                                                                 Alkali Sacaton (R)

Stachys ajugoides var. rigida Jeps. & Hoover                                               Rigid Hedge Nettle (R)

Stebbinsoseris heterocarpa (Nuttall) Chambers                                            Chicory Microseris (U)

Stellaria nitens Nuttall                                                                                       Shining Chickweed (R)

Stephanomeria exigua ssp. carotifera (Hoover) Gottlieb                            Carot Stephanomeria (U)

Stephanomeria exigua ssp. coronaria (Greene) Gottlieb                            Small Stephanomeria (U)

Stephanomeria exigua Nuttall ssp. exigua                                                    Small Stephanomeria (R)

Stephanomeria pauciflora (Nutt.) Nelson var. pauciflora                          Wire-lettuce (U)

Stephanomeria virgata ssp. pleurocarpa (Greene) Gottlieb                       Two-fruited Wreath Plant (R)

Stillingia linearifolia S. Watson                                                                     Narrowleaf Stillingia (R-extirpated?)

Stillingia spinulosa Torrey                                                                                               Annual Toothleaf (R-extirpated?)

Scientific Name                                                                                                   Common Name

Streptanthus campestris S. Watson                                                                 Southern Jewelflower (R)

Stylocline gnaphaloides Nuttall                                                                       Everlasting Nest Straw (U)

Stylomecon heterophylla (Benth.) G. Taylor                                                  Wind Poppy (R)

Suaeda calceoliformis (Hook.) Moq.                                                               Seablite (R)

Suaeda esteroa Ferren & Whitmore                                                                 Estuary Seablite (R) CNPS List 1B

Suaeda moquinii (Torrey) Greene                                                                    Bush Seepweed (R)

Suaeda taxifolia (Standl.) Standl.                                                                     Woolly Seablite (R) CNPS List 4

Swertia neglecta (H.M. Hall) Jeps.                                                                   Pine Green Gentian (U) CNPS List 4

Symphoricarpos albus var. laevigatus (Fern.) S.F. Blake                             Snowberry (R)

Syntrichopappus lemmonii (A. Gray) A. Gray                                               Lemmon’s Xerasid (R) CNPS List 4

Tauschia hartwegii (A.Gray) J.F. Macbr.                                                        Hartweg Tauschia (R)

Tetradymia canescens DC.                                                                                Cottonthorn, Horsebush (R)

Tetradymia comosa Gray                                                                                   Cottonthorn, Horsebush (R)

Thalictrum fendleri Engelmann ex Gray                                                          Fendler Meadow-rue (R)

Thalictrum polycarpum (Torrey) S. Watson                                                  Tall Western Meadow-rue (R)

Thermopsis californica var. argentata (Greene) Chen & Turner                Silvery False-Lupine (U) CNPS List 4

Thermopsis macrophylla var. venosa (Eastwood) Isely                               Slender Santa Ynez False-Lupine

Trichostema micranthum Gray                                                                          Bluecurls (R)

Trichostema ovatum Curran                                                                              Ovate Bluecurls (R)

Trifolium albopurpureum var. dictotomum (H. & A.) Isely                         Island Rancheria Clover (R)

Trifolium ciliolatum Benth.                                                                               Ciliate or Tree Clover (U)

Trifolium cyathiferum Lindley                                                                           Ciliate or Tree Clover (R)

Trifolium depauperatum var. amplectens (T. & G.) L.F. McDermott          Dwarf Sack Clover (R)

Trifolium depauperatum var. truncatum (Greene ) Islay                              Truncate Dwarf Sack Clover (U)

Trifolium fucatum Lindley                                                                                  Bull Clover (R)

Trifolium gracilentum var. palmeri (Watson) McDermott                          Palmer Pinpoint Clover (R)

Trifolium longipes ssp. atrorubens (Greene) J.M. Gillett                             Purple Clover (R)

Trifolium microcephalum Pursh                                                                       Tiny-head Clover (U)

Trifolium microdon Hook. & Arn.                                                                    Tiny-head Clover (R)

Trifolium monanthum Gray var. monanthum                                                  Carpet Clover (R)

Trifolium monanthum var. grantianum (A.A. Heller) Parish                       Carpet Clover (R)

Trifolium obtusiflorum Hooker & Arnott                                                        Creek Clover (R)

Trifolium variegatum Nutt.                                                                                Whitetip Clover (R)

Trifolium wormskioldii Lehm.                                                                           Cows Clover (R)

Triglochin concinna Davy var. concinna                                                      Utah Arrow-grass (R)

Triglochin maritima L.                                                                                       Seaside Arrow-grass (R)

Triglochin striata R. & P.                                                                                  Three-ribbed Arrow-grass (R)

Triteleia ixioides (Aif. F.) Greene ssp. ixioides                                             Golden Brodiaea (R)

Tropidocarpum gracile Hook. [var. dubium]                                                 Slender Tropidocarpum (R)

Typha angustifolia L.                                                                                         Slender Cattail (R)

Typha latifolia L.                                                                                                 Broad-leaved Cattail, Soft Flag (U)

Typha Xdomingensis Pers.                                                                                 Southern Cattail Hybrid (R)

Veratrum californicum Durand var. californicum                                         California False Hellebore (R)

Verbena bracteata Lagasca & J.D. Rodriguez                                               Prostrate Verbena (R)

Verbena lasiostachys var. scabrida Mold.                                                     Western Verbena (R)

Veronica peregrina ssp. xalapensis (Kunth) Pennell                                   Purslane Speedwell (U)

Veronica serpyllifolia ssp. humifusa (Dickson) Syme                                  Tyme-leaved Speedwell (R)

Vicia americana Willd. var. americana                                                          American Vetch (U)

Vicia hassei S. Watson                                                                                      Hasse Vetch (R)

Vicia ludoviciana Nutt. var. ludoviciana                                                       Vetch (R)

Viguiera laciniata Gray                                                                                     San Diego County Viguiera (R)

Viola aurea Kellogg                                                                                           Golden Violet (R)

Viola macloskeyi F.E. Lloyd ssp. macloskeyi                                                                Small White Violet (R)

Viola pedunculata ssp. tenuifolia M.S. Baker & J.C. Clausen                    Johnny-Jump-Up (U)

Viola pinetorum ssp. grisea (Jeps.) R.J. Little                                                Gray-leaved Violet (R) CNPS 1B

Viola pinetorum Greene ssp. pinetorum                                                         Mountain Violet (U)

Scientific Name                                                                                                   Common Name

Viola purpurea Kellogg ssp. purpurea                                                           Purple or Mountain Violet (U)

Viola purpurea ssp. mohavensis (M. Baker & J. Clausen) J. Clausen        Mojave Yellow Violet (U)

Viola purpurea ssp. quercetorum (M. Baker & J. Clausen) R.J. Little       Oak Violet (U)

Vitis californica Benth.                                                                                      California Wild Grape (R)

Vitis girdiana Munson                                                                                      Desert Wild Grape (R)

Vulpia microstachys var. confusa (Piper) Lonard & Gould                          Ciliate Fescue (R)

Yabea microcarpa (Hooker & Arnott) Koso-Pol.                                          Yabea (R)

Zannichellia palustris L.                                                                                   Horned-Pondweed (R)

Zostera marina L.                                                                                                Eel-grass (R)

 

 

Plants Expected to Occur in Ventura County But Lacking Physical Evidence[9]

Scientific Name                                                                                                   Common Name

Abronia latifolia Eschsch.                                                                                                Coastal or Yellow Sand-verbena Ф

Achnatherum latiglumis (Swallen) Barkworth                                                Needlegrass Ф

Actaea rubra (Aiton) Wildenow                                                                       Red Banberry Ф

Adiantum aleuticum (Rupr.) C.A. Paris                                                           Western Five-finger Fern or Maidenhair Ф

Agastache urticifolia (Bentham) Kuntze var. urticifolia                              Nettleleaf Horsemint, Giant Hyssop Ф

Agrostis microphylla Steudel                                                                            Small-leaved Bentgrass Ф

Agrostis scabra Willd.                                                                                        Rough Bentgrass Ф

Allenrolfea occidentalis (S. Watson) Kuntze                                                                Iodine Bush Ф

Allophyllum integrifolium (Brand) A.D. Grant & V. Grant                           Sticky Allophyllum Ф

Alopecurus aequalis Sobol. var. aequalis                                                      Short-awn Foxtail Ф

Alopecurus geniculatus L.                                                                                 Water Foxtail Ф

Ambrosia dumosa (A. Gray) Payne                                                                  White Bur-sage, Burro Bush, Burro-Weed Ф

Amsinckia eastwoodae J.F. Macbr.                                                                  Elegant Fiddleneck Ф

Anaphalis margaritaceae (L.) Benth. & Hooker F. ex C.B. Clarke              Pearly Everlasting Ф

Arabis platysperma Gray var. platysperma                                                    Pioneer Rock Cress Ф

Aristida purpurea var. nealleyi (Vasey) K.W. Allred                                   Nealley Three-awn Grass Ф

Aristida purpurea Nuttall var. purpurea                                                         Purple Three-awn Grass Ф

Aristida purpurea var. wrightii (A. Hitchc.) K.W. Allred                            Parish Three-awn Grass Ф

Arnica discoidea Benth. var. discoidea                                                          Rayless or Discoid Arnica Ф

Artemisia ludoviciana ssp. incompta (Nuttall) Keck                                   White Sagebrush Ф

Aster occidentalis (Nuttall) Torrey & A. Gray var. occidentalis Western Mountain Aster Ф

Athyrium filix-femina var. californicum Butters                                            Southwestern Lady Fern Ф

Athyrium filix-femina var. cyclosorum Ruprecht                                           Northwestern Lady Fern Ф

Atriplex parishii S. Watson                                                                              Parish Brittlescale Ф

Azolla mexicana C. Presl                                                                                    Mexican Duckweed Fern Ф

Berberis pinnata Lagasca ssp. pinnata                                                          Pinnate-leaved Barberry Ф

Brodiaea elegans Hoover ssp. elegans                                                          Elegant Brodiaea Ф

Brodiaea jolonensis Eastwood                                                                         Dwarf Brodiaea Ф

Calystegia longipes (S. Watson) Brummitt                                                    Morning-glory Ф

Calystegia sepium ssp. limnophila (E. Greene) Brummitt                            Riparian Morning-glory Ф

Carex schottii Dewey                                                                                         Schott Sedge Ф

Carex serratodens W. Boott                                                                             Sawtooth Sedge Ф

Castilleja campestris (Bentham) Chuang & Heckard ssp. campestris       Field Owl’s Clover Ф

Castilleja densiflora ssp. gracilis (Benth.) Chuang & Heckard                 Slender Dense-flowered Owl’s Clover Ф

Castilleja plagiotoma A. Gray                                                                          Mojave Indian Paintbrush Ф

Castilleja tenuis (A.A. Heller) Chuang & Heckard                                        Bristle Owl’s Clover Ф

Scientific Name                                                                                                   Common Name

Caulanthus crassicaulis (Torrey) S. Watson var. crassicaulis                  Thick-stem Wild Cabbage Ф

Centaurium muhlenbergii (Griseb.) W. Wright ex Piper                              Monterey Centaury Ф

Centromadia fitchii (A. Gray) E. Greene                                                         Fitch Spikeweed Ф

Cephalanthera austiniae (A. Gray) Heller                                                      Phantom Orchid Ф

Chamaesyce serpyllifolia ssp. hirtula (S. Watson) Koutnik                       Hairy Thyme-leaved Spurge Ф

Chorizanthe fimbriata Nuttall var. fimbriata                                                 Fringed Spineflower (R) – Newhall Ranch

Chorizanthe obovata Goodman                                                                       Obovate Spineflower Ф

Chorizanthe wheeleri S. Watson                                                                     Wheeler Spineflower Ф

Circaea alpina ssp. pacifica (Aschers. & Magnus) Raven                        Enchanter’s Nightshade Ф

Cladium californicum (S. Watson) O’Neill                                                     Saw-grass Ф

Clarkia heterandra (Torrey) H. Lewis & Raven                                            California Gaura Ф

Clarkia similis Harlan Lewis & Ernst                                                              Copy-cat Clarkia Ф

Clematis pauciflora Nuttall                                                                               Ropevine Ф

Collomia linearis Nuttall                                                                                   Narrow-leaved Collomia Ф

Comarostaphylis diversifolia ssp. planifolia (Jeps.) G.D. Wallace           Simpleleaf Summer Holly Ф

Corallorhiza maculata (Raf.) Raf.                                                                    Spotted Coral Root Ф

Coreopsis californica (Nuttall) H.K. Sharsmith var. californica California Coreopsis Ф

Cornus nuttallii Audubon                                                                                                Mountain Dogwood Ф

Cornus sericea ssp. occidentalis (Torrey & A. Gray) Fosberg                   Western American Dogwood Ф

Crassula solieri (C. Gay) F. Meigen                                                 Solier Vernal Pool Water Pigmy-weed Ф

Cucurbita palmata S. Watson                                                                          Coyote Melon Ф

Cuscuta californica var. papillosa Yuncker                                                  California Dodder Ф

Cyperus niger Ruiz Lopez & Pavon                                                                 Black Flatsedge Ф

Damasonium californicum Bentham                                                                Fringed Water-Plantain Ф

Deschampsia elongata (Hooker) Bentham                                                     Slender Hairgrass Ф

Descurainia incisa (A. Gray) Britton ssp. incisa                                           Richardson Tansy Mustard Ф

Dodecatheon clevelandii E. Greene ssp. clevelandii                                   Cleveland Shooting Star Ф

Elatine rubella Rydb.                                                                                         Waterwort Ф

Eleocharis parvula (Roemer & Schultes) Link                                               Colorado Spike-rush Ф

Epilobium halleanum Hausskn.                                                                       Gland Willow-herb Ф

Eremalche exilis (A. Gray) E. Greene                                                               White-flowered Mallow Ф

Eremalche parryi ssp. kernensis (C. Wolf) D. Bates                                    Kern Mallow Ф

Erigeron philadelphicus L.                                                                               Philadelphia Fleabane Ф

Eriogonum pusillum T. & G.                                                                             Puny Buckwheat Ф

Eriophyllum ambiguum (A. Gray) A. Gray var. ambiguum                          Ambiguous Woolly Daisy Ф

Eriophyllum lanatum var. hallii Constance                                                   Fort Tejon Yarrow Ф

Eschscholzia lemmonii ssp. kernensis (Munz) C. Clark                               Tejon Poppy Ф

Eustoma exaltatum (L.) Don                                                                              Catchfly Gentian Ф

Euphorbia crenulata Engelmann                                                                     Chinese Caps Ф

Fraxinus latifolia Bentham                                                                               Oregon Ash Ф

Galium californicum ssp. flaccidum (E. Greene) Dempster & Stebb.         California Bedstraw Ф

Garrya elliptica Lindley                                                                                    Silk-tassel Bush Ф

Gayophytum humile A.L. Juss.                                                                         Low Gayophytum Ф

Gayophytum oligospermum H. Lewis & J. Szweykowski                             Southern California Mountain Gayophytum Ф

Geranium carolinianum L.                                                                                Cransebill, Carolina Geranium Ф

Geranium richardsonii Fischer & Trautv.                                                      Mountain Geranium Ф

Gilia tricolor Bentham ssp. tricolor                                                                                Birds-eye or Tricolor Gilia Ф

Glyptopleura marginata D. Eaton                                                                   Sculpted-fruit Ф

Grayia polygaloides Hooker & Arnott                                            Hop-Sage Ф

Helianthus californicus DC.                                                                              California Sunflower Ф

Hesperolinon micranthum (A. Gray) Small                                                     Dwarf Flax Ф

Hesperomecon linearis (Bentham) E. Greene                                 Western Poppy Ф

Heterocodon rariflorum Nuttall                                                                        Western Pearl-flower Ф

Hordeum jubatum L.                                                                                           Foxtail Barley Ф

Hydrocotyle ranunculoidies L.f.                                                                      False-crowfoot Pennywort Ф

Hydrocotyle umbellata L.                                                                                  Marsh Pennywort Ф

Scientific Name                                                                                                   Common Name

Hymenoclea monogyra Torrey & Gray                                                            Leafy Burrobrush Ф

Hymenoclea salsola var. pentalepis (Rydb.) L. Benson                               Southern Burrobrush Ф

Iris douglasiana Herbert in W.J. Hooker and G.A.W. Arnott                     Mountain Iris Ф

Isoëtes orcuttii A.A. Eaton                                                                                                Orcutt Quillwort Ф

Juncus bryoides F.J. Hermann                                                                           Moss Rush Ф

Juncus falcatus E. Meyer var. falcatus                                                            Sickleleaf Rush Ф

Juncus orthophyllus Cov.                                                                                  Straight-leaf Rush Ф

Lasthenia fremontii (A. Gray) E. Greene                                                          Fremont Goldfields Ф

Lasthenia glaberrima A. DC.                                                                            Rayless or Smooth Goldfields Ф

Lasthenia microglossa (A. DC.) E. Greene                                                      Small-rayed Goldfields Ф

Layia hieracioides (DC.) Hooker & Arnott                                                    Tall Layia Ф

Lepidium latipes Hooker var. latipes                                                               Dwarf Peppergrass Ф

Lilaea scilloides (Poir.) Haum.                                                                          Flowering Quillwort Ф

Lonicera hispidula var. vacillans A. Gray                                                     California Honeysuckle Ф

Lonicera interrupta Benth. X Lonicera hispidula var. vacillans Gray      Chaparral Honeysuckle hybrid Ф

Luzula comosa E. Meyer                                                                                    Wood Rush Ф

Luzula subsessilis (S. Watson) Buchenau                                                      Wood Rush Ф

Madia elegans ssp. densifolia (E. Greene) Keck                                           Dense-flowered Tarplant or Madia Ф

Malacothrix coulteri Gray                                                                                 Snake-head Ф

Mimulus palmeri A. Gray                                                                                   Palmer Monkeyflower Ф

Minuartia californica (A. Gray) Mattf.                                                           California Sandwort Ф

Monardella australis Abrams                                                                          Southern Coyote Mint Ф

Monardella villosa ssp. obispoensis (Hoover) Jokerst                                                San Luis Obispo Coyote Mint Ф

Najas marina L.                                                                                                   Spiny Naiad Ф

Nemophila parviflora var. quercifolia (Eastw.) Chandler                            Oak-leaved Nemophila (R)

Opuntia phaeacantha Engelm.                                                                         Engelmann Prickly Pear Ф

Orthocarpus linearilobus Bentham                                                                 Pallid Owl’s Clover Ф

Osmorhiza chilensis Hooker & Arnott                                                            Mountain Sweetroot or Sweet Cicely Ф

Panicum acuminatum Sw. var. acuminatum                                                  Panicgrass Ф

Parnassia californica (A. Gray) E. Greene                                                      Grass-of-Parnassus Ф

Penstemon spectabilis Thurber var. [ssp.] spectabilis                                 Royal Penstemon Ф

Penstemon spectabilis var. [ssp.] subviscosis (Keck) McMinn                  Sticky Royal Penstemon Ф

Phacelia congdonii Greene                                                                               Congdon Phacelia Ф

Phoradendron libocedri (Engelm.) Howell                                                     Incense-cedar Mistletoe Ф

Physalis acutifolia (Miers) Sandw.                                                                  Ground-cherry Ф

Plagiobothrys collinus var. californicus (A. Gray) Higgins                        California Popcornflower Ф

Plectritis brachystemon Fischer & C. Meyer                                                 Small-flowered Pink Plectritis Ф

Pogogyne zizyphoroides Bentham                                                                   Sacramento Mesamint Ф

Polygonum amphibium var. stipulaceum Coleman                                       Stipuled Water-Smartweed Ф

Polygonum douglasii E. Greene ssp. douglasii                                             Douglas Knotweed Ф

Quercus garryana var. breweri (Engelm.) Jeps.                                             Brewer Oregon Oak Ф

Ranunculus aquatilis var. capillaceus (Thuill.) DC.                                     Slender White Water Crowfoot Ф

Rubus leucodermis var. bernardinus (E. Greene) Jepson                             Sticky Blackcap Raspberry Ф

Rubus parviflorus Nuttall                                                                                   Thimbleberry Ф

Sagittaria calycina Englemann                                                                        Hooded Arrowhead Ф

Sagittaria latifolia Willd.                                                                                  Broadleaf Arrowhead Ф

Salix sitchensis Bong.                                                                                        Sitka Willow Ф

Sanicula hoffmannii (Munz) Stan & Constance                                            Hoffmann’s Sanicle Ф

Scutellaria bolanderi ssp. austromontana Epling                                       Southern Skullcap Ф

Senecio californicus DC.                                                                                   California Ragwort

Spirodela polyrrhiza (L.) Schlied.                                                                    Duckmeat Ф

Spirodela punctata C. Thompson                                                                    Duckmeat Ф

Sporobolus airoides Torrey                                                                              Alkali Sacaton Ф

Streptanthella longirostris Rydb.                                                                    Dwarf Jewelflower Ф

Thelypteris puberula var. sonorensis A.R. Smith                                          Sonoran Maiden Fern Ф

Thermopsis macrophylla Hook. & Arn. var. macrophylla                           False-Lupine Ф

Scientific Name                                                                                                   Common Name

Trichostema austromontanum Harlan Lewis ssp. austromontanum          San Jacinto Bluecurls Ф

Trichostema parishii Vasey                                                                              Parish Bluecurls Ф

Triteleia dudleyi Hoover                                                                                   Dudley Triteleia Ф

Triteleia hyacinthina (Lindley) E. Greene                                                       White Triteleia Ф

Triteleia ixioides ssp. scabra (E. Greene) L. Lenz                                         Golden Brodiaea Ф

Triteleia laxa Bentham                                                                                       Ithuriel Spear Ф

Utricularia vulgaris L.                                                                                       Bladderwort Ф

Vaccinium ovatum Pursh                                                                                   California Huckleberry Ф

Viola sheltonii Torrey                                                                                        Shelton Violet Ф

Wolffia borealis Landolt & O. Wildi                                                 Water-meal Ф

Wolffia columbiana Karsten                                                                              Coastal Water-meal Ф

Wolffia globosa Hartog & Plas                                                                          Globe Water-meal Ф

Wolffiella lingulata Hegelm.                                                                             Mud-midget Ф

Wolffiella oblonga (Phil.) Hegelm.                                                                    Oblong Water-meal Ф

Wyethia ovata T. & G.                                                                                        Mule-ears Ф

Yucca brevifolia var. herbertii (J.M. Webber) Munz                                    Herbert Joshua Tree Ф

 

Plants Recently Removed from List

Below is a list of taxa that were previously included on this list, but removed after the eleventh (presumed) extant population was found (through either direct field surveys or searches of herbaria records).  Only those taxa removed from the current edition are listed below.  Consult earlier editions of this checklist for taxa previously removed.  A total of 93 taxa were removed since the publication of this checklist in early 2007, of which 25 taxa were removed since the 3 August 2007 edition.

Scientific Name                                                                                                   Common Name

Achillea millefolium L. var. arenicola (Heller) Nobs in Ferris                     Common Island White Yarrow (R)

Achillea millefolium L. var. californica (Pollard) Jepson                             California White Yarrow (R)

Achillea millefolium L. var. occidentale DC.                                                 Woolly White Yarrow (U)

Achillea millefolium L. var. millefolium                                                          White Yarrow (U)

Achillea millefolium L. var. pacifica (Rydb.) G.N. Jones                             Pacific White Yarrow (R)

Agoseris grandiflora (Nutt.) Greene                                                                Bigflower [Mountain] Dandelion (U)

Arctostaphylos glandulosa ssp. glaucomollis P. Wells                                              Transverse Ranges Manzanita (U)

Arctostaphylos glandulosa ssp. zacaensis (Eastw.) P. Wells                     Zaca Lake Manzanita (U)

Carex feta L. Bailey                                                                                             Green-sheathed Sedge Ф

Carex spissa L. Bailey                                                                                         San Diego Sedge Ф

Chamaesyce albomarginata (Torrey & A. Gray) Small                                Rattlesnake Spurge (U)

Clarkia epilobioides (Nutt.) A. Nels. & J.F. Macbr.                                     Willow-herb Godetia (U)

Cryptantha clevelandii E. Greene                                                                    Cleveland Forget-Me-Not (U)

Delphinium cardinale Hooker                                                                          Scarlet or Cardinal Larkspur (U)

Eleocharis geniculata (L.) Roemer & Schultes                                              Geniculate Spike-rush Ф

Eleocharis radicans (Poir.) Kunth                                                                   Rooted Spike-rush Ф

Eriastrum filifolium (Nutt.) Woot. & Standl.                                                  Narrowleaf Woolly Star (R)

Galium nuttallii A. Gray ssp. nuttallii                                                            San Diego or Climbing Bedstraw (U)

Lithophragma affine Gray                                                                                  Woodland Star (U)

Malacothamnus orbiculatus (Greene) Greene                                               Roundleaf Bushmallow (R)

Mentzelia pinetorum A.A. Heller                                                                     Stickleaf (R)

Quercus Xeplingii C.H. Muller                                                                          White Oak hybrid Ф

Sagittaria longiloba Engelmann                                                                      Gregg Arrow-head Ф

Salix bonplandiana Kunth.                                                                              Willow (R)

Viola pedunculata T.& G. ssp. pedunculata                                                 Johnny-Jump-Up (U)

Viola sheltonii Torrey                                                                                        Shelton Violet (R)

 



[1] This document should be cited as:  Magney, D.L.  2008.  Checklist of Ventura County Rare Plants.  21 May 2008.  California Native Plant Society, Channel Islands Chapter, Ojai, California.  (Previous published update dated 3 August 2007.)

[2] California Native Plant Society.  2001.  Inventory of Rare and Endangered Plants of California.  Sixth edition.  (Special Publication No. 1.)  Rare Plant Scientific Advisory Committee, David Tibor, Convening Editor, Sacramento, California.  September.

[3] Ferren, W.R., Jr., D.L. Magney, and T.A. Sholars.  1995.  The Future of California Floristics and Systematics:  Collecting Guidelines and Documentation Techniques.  Madroño 42(2):197-210.

[4] California Native Plant Society.  2001.  Inventory of Rare and Endangered Plants of California.  Sixth Edition.  Sacramento, California.  September.

[5] Ibid.

[6] Buse, John, Esq., Environmental Defense Center, memorandum to David Magney of CNPS dated 14 September 2002.

[7] Scientific name:  The complete scientific name is provided for each taxon and consists of the genus, species, and author (person who formally described and named the plant).  Underlined entries indicate taxa found only on the Channel Islands (Anacapa or San Nicolas Islands).

[8] Common names are given for all taxa, many of which are invented by the author as no common name has been identified otherwise.  “R”, “U”, “Limits”, or “Type” in parentheses indicated the category of rarity:  R = rare (formally listed by USFWS, CDFG, CNPS, or with 5 or fewer occurrences in Ventura County); U = uncommon (with 6 to 10 occurrences in Ventura County); Limits = indicate taxon reaches its distribution limits in Ventura County; Type = type locality is within Ventura County.

[9] Taxa that are expected to occur within Ventura County but for which no vouchers have been collected or observed.  If any of these taxa are found within Ventura County, they should be considered locally rare species.  Plants with a “Ф” following the common name lack vouchers from Ventura County at the following herbaria (CHSC, DAV, IRVC, JEPS, POM, RSA, SBBG, SD, SJSU, UC, UCI, UCR, UCSB, USSC).