Rare Plants of the Liebre Mountains, Los Angeles County

Based on the research and flora published by Steve Boyd of the Liebre Mountains, David Magney compiled a preliminary list of rare plants of the Liebre Mountains region in northwestern Los Angeles County (Boyd, S. 1999. Vascular Flora of the Liebre Mountains, Western Transverse Ranges, California. (Occasional Publications, No. 5.) Rancho Santa Ana Botanic Garden, Claremont, California, reprinted from Aliso 18(2):93:139, 1999). Similar rules used for the Ventura County rare plants list were applied to the Liebre Mountains flora. This checklist should be considered preliminary and is currently under critical review by Mr. Boyd at the Rancho Santa Ana Botanic Garden Herbarium.

A total of 282 vascular plant taxa are currently on this list, including some unusual hybrids. Two categories are used: rare and uncommon, following the same criteria used for the Ventura County checklist of rare plants (“rare” for taxa with 5 or fewer populations or otherwise listed, “uncommon” for taxa with 6-10 populations). Some of the “rare” species are also otherwise listed by the USFWS, CDFG, and/or CNPS.

Map of Liebre Mountains Region

Map clipped from TOPO!

Preliminary Checklist of Liebre Mountain Region Locally Rare Plants

Scientific Name	Rarity
Acanthomintha obovata	Rare
Achyrachaena mollis	Rare
Adiantum capillus-veneris	Uncommon
Allium burlewii	Rare (only 1 herbarium record)
Allium campanulatum	Rare
Allium haematochiton	Rare
Allium lacunosum var. davisiae	Rare
Allium lacunosum var. lacunosum	Uncommon
Allium praecox	Rare
Allophyllum divaricatum	Rare
Allophyllum gilioides ssp. gilioides	Rare
Allophyllum gilioides ssp. violaceum	Uncommon
Allophyllum glutinosum	Rare
Amelanchier utahensis	Uncommon
Apocynum cannabinum	Rare
Arabis glabra var. glabra	Uncommon
Arabis pulchra var. gracilis	Rare
Arabis sparsiflora var. arcuata	Uncommon
Arabis sparsiflora var. californica	Rare
Arctostaphylos parryana	Rare
Argemone corymbosa	Uncommon
Aristida adscensionis	Rare
Aristida purpurea var. parishii	Rare
Asclepias erosa	Rare
Asclepias vestita	Rare
Aster frondosus	Rare
Aster greatae	Rare
Aster subulatus var. ligulatus	Rare
Astragalus pachypus var. pachypus	Rare
Atriplex serenana var. serenana	Rare
Azolla filiculoides	Uncommon
Baccharis emoryi	Uncommon
Barbarea orthoceras var. dolichocarpa	Uncommon
Berberis nevinii	Rare (evidence that the population in San Francisquito Canyon was originally planted by Theodore Payne after 1928 flood)
Bowlesia incana	Rare
Brickellia nevinii	Uncommon
Bromus orcuttianus var. hallii	Rare
Callitriche marginata	Rare
Calochortus plummerae	Rare
Calochortus splendens	Rare
Calystegia macrostegia ssp. intermedia	Uncommon
Calystegia malacophylla ssp. pedicellata	Uncommon
Camissonia confusa	Rare
Camissonia micrantha	Rare
Cardamine californica var. californica	Uncommon
Cardamine californica var. integrifolia	Uncommon
Carex diandra	Rare
Carex lanuginose	Rare
Carex multicaulis	Rare
Carex praegracilis	Uncommon
Carex schottii	Rare
Carex senta	Rare
Castilleja affinis X Castilleja foliolosa	Rare
Castilleja chromosa	Rare
Castilleja linariifolia	Rare
Castilleja plagiotoma	Rare
Caulanthus amplexicaulis var. amplexicaulis	Uncommon
Caulanthus cooperi	Rare
Caulanthus lasiophyllus var. lasiophyllus	Uncommon
Caulanthus lasiophyllus var. utahense	Uncommon
Ceanothus crassifolius X Ceanothus cuneatus var. cuneatus	Rare
Centaurium venustum	Uncommon
Chamaescyce serpyllifolia var. serpyllifolia	Rare
Chenopodium dessicatum	Uncommon
Chorizanthe brevicornu var. brevicornu	Rare
Chorizanthe breweri	Rare
Chorizanthe parryi var. fernandina	Rare
Chorizanthe parryi var. parryi	Rare
Chrysothamnus nauseosus ssp. bernardinus	Rare
Chrysothamnus teretifolius	Uncommon
Clarkia bottae	Uncommon
Clarkia epilobioides	Uncommon
Claytonia parviflora ssp. utahensis	Rare
Collinsia parviflora	Rare
Conyza coulteri	Uncommon
Corethrogyne filaginifolia var. pinetorum	Uncommon
Cornus glabrata	Rare
Cornus sericea ssp. sericea	Rare
Cryptantha micrantha	Uncommon
Cryptantha oxygona	Uncommon
Cryptantha simulans	Uncommon
Cyperus eragrostis	Uncommon
Deschampsia danthodioides	Uncommon
Dodecahema leptoceras	Rare
Dodecatheon clevelandii ssp. sanctarum	Rare
Draba cuneifolia	Rare
Draba verna	Rare
Eclipta prostrata	Rare
Elatine chilensis	Rare
Eleocharis macrostachya	Uncommon
Elymus stebbinsii	Rare
Epilobium pygmaeum	Rare
Equisetum hyemale ssp. affine	Uncommon
Equisetum telmateia ssp. braunii	Uncommon
Eragrostis mexicana ssp. virescens	Rare
Eragrostis pectinacea var. pectinacea	Uncommon
Eriastrum filifolium	Uncommon
Eriastrum sparsiflorum	Uncommon
Ericameria cooperi ssp. cooperi X Ericameria linearifolia	Rare
Ericameria cuneata	Rare
Ericameria palmeri var. pachylepis	Uncommon
Eriodictyon trichocalyx var. trichocalyx	Rare
Eriogonum brachynathum	Rare
Eriogonum inerme var. hispidulum	Rare
Eriogonum maculatum	Uncommon
Eriogonum mohavense	Rare
Eriogonum ordii	Rare
Eriogonum nudum var. westonii	Uncommon
Eriogonum parishii	Rare
Eriogonum pusillum	Rare
Eriogonum trichopes	Rare
Eriogonum wrightii var. trachygonum	Uncommon
Eriophyllum pringlei	Uncommon
Eriophyllum wallacei	Uncommon
Erodium macrophyllum	Rare
Eschscholzia minutiflora	Uncommon
Filago depressa	Rare
Forestiera pubescens	Uncommon
Frankenia salina	Rare
Fraxinus dipetala	Uncommon
Fraxinus velutina	Uncommon
Fritillaria biflora	Rare
Gilia aliquanta ssp. aliquanta	Rare
Gilia diegensis	Rare
Gilia latiflora ssp. cuyamensis	Rare
Gilia malior	Rare
Gilia minor	Rare
Githopsis diffusa	Rare (only one herbarium record)
Gnaphalium bicolor	Rare
Gnaphalium microcephalum	Rare
Gnaphalium stramineum	Uncommon
Gnaphalium thermale	Uncommon
Grindelia camporum var. bracteosa	Uncommon
Harpagonella palmeri	Uncommon
Hazardia squarrosa var. obtusa	Uncommon
Helianthus californicus	Uncommon
Hemizonia kelloggii	Uncommon
Heracleum lanatum	Rare
Hesperocnide tenella	Rare
Hesperolinon micranthum	Rare
Heterotheca sessiliflora ssp. echioides	Rare
Hoita orbicularis	Rare
Hordeum brachyantherum ssp. californicum	Rare
Hordeum intercedens	Uncommon
Hypericum formosum var. scouleri	Rare
Isopyrum occidentale	Uncommon
Juglans californica var. californica	Rare
Juncus balticus	Uncommon
Juncus torreyi	Rare
Lastarriaea coriacea	Rare
Layia platyglossa	Uncommon
Lemmonia californica	Rare
Lemna minor	Uncommon
Lemna minuscule	Uncommon
Lepidium fremontii	Uncommon
Lepidium nitidum var. nitidum	Uncommon
Lepidium virginicum var. pubescens	Uncommon
Leptochloa fascicularis	Rare
Linanthus aureus ssp. aureus	Uncommon
Linanthus brevicaulus	Rare
Linanthus parryae