Welcome to the Inventory of Rare, Threatened, and Endangered Plants of California

The CNPS Inventory of Rare and Endangered Plants has served as a resource for information about California's rare plants for over 35 years. The Inventory is a widely-recognized resource that promotes scientific research, conservation planning, and the enforcement of environmental laws. To search for information regarding California's rare and endangered plants, please click on the "Simple Search" or "Advanced Search" buttons below, or enter a word or phrase directly into the search bar to begin.

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Carrizo Plain

Additions / Changes / Deletions

Usnea longissima added to 4 on 2014-03-02
Thamnolia vermicularis added to 2B.1 on 2014-03-01
Texosporium sacti-jacobi added to 3 on 2014-03-01
Sulcaria isidiifera added to 1B.1 on 2014-03-01
Solorina spongiosa added to 2B.2 on 2014-03-01
Ramalina thrausta added to 2B.1 on 2014-03-01
Peltigera gowardii added to 4.2 on 2014-03-01
Mobergia calculiformis added to 3 on 2014-03-01
Hypogymnia schizidiata added to 1B.3 on 2014-03-01
Graphis saxorum added to 3 on 2014-03-01
Cladonia firma added to 2B.1 on 2014-03-01
Calicium adspersum added to 2B.2 on 2014-03-01
Bryoria spiralifera added to 1B.1 on 2014-02-28
Polemonium eddyense added to 1B.2 on 2014-02-21
Bryoria pseudocapillaris added to 3.2 on 2014-02-18
Racomitrium aquaticum added to CBR on 2014-02-12
Ptychostomum pacificum added to CBR on 2014-02-12
Porotrichum bigelovii added to CBR on 2014-02-12
Orthodontium gracile added to CBR on 2014-02-12
Imbribryum mildeanum added to CBR on 2014-02-12
Grimmia serrana added to CBR on 2014-02-12
Didymodon eckeliae added to CBR on 2014-02-12
Archidium alternifolium added to CBR on 2014-02-12
Ceanothus roderickii changed from 1B.2 to 1B.1 on 2014-01-30
Draba longisquamosa added to CBR on 2014-01-23
Solidago guiradonis changed from 4.2 to 4.3 on 2014-01-22
Lagophylla diabolensis added to 1B.2 on 2014-01-22
Lupinus guadalupensis changed from 1B.2 to 4.2 on 2014-01-22
Monardella sinuata ssp. nigrescens added to 1B.2 on 2014-01-03
Monardella sinuata ssp. sinuata added to 1B.2 on 2014-01-03
Monardella undulata changed from 4.2 to CBR on 2014-01-03
Eriastrum ertterae added to 1B.1 on 2013-12-20
Frasera albomarginata var. induta added to 1B.2 on 2013-12-20
Frasera albomarginata var. albomarginata changed from 4.3 to 2B.2 on 2013-12-20
Plagiobothrys collinus var. gracilis added to CBR on 2013-12-11
Eriastrum rosamondense added to 1B.1 on 2013-12-09
Astragalus austiniae changed from CBR to 1B.3 on 2013-12-05
Carex nardina added to 2B.2 on 2013-10-29
Erythranthe taylori added to 1B.1 on 2013-10-29
Heteranthera dubia added to 2B.2 on 2013-10-29
Tiquilia canescens var. pulchella added to 3.2 on 2013-10-11
Lewisia kelloggii ssp. hutchisonii changed from 3.3 to 3.2 on 2013-10-03
Lewisia kelloggii ssp. kelloggii added to 3.2 on 2013-10-03
Erythranthe sierrae added to 4.2 on 2013-10-03
Eremogone congesta var. subcongesta added to CBR on 2013-10-03
Eremogone congesta var. simulans added to CBR on 2013-10-03
Eremogone congesta var. crassula added to CBR on 2013-10-03
Brodiaea santarosae changed from 3 to 1B.2 on 2013-09-17
Linanthus bernardinus added to 1B.2 on 2013-09-16

All Major Changes Since 6th Edition, 2001

Currently in Review

Rare Plant Status Review Forum | Forum Membership Information | Status Reviewer Form

Major Contributors
Additional Funding Provided by: Beatrice Harris \| LSA Associates \| Sapphos Environmental