CNPS Inventory Plant Detail

Calochortus pulchellus

Common Name:	Mt. Diablo fairy-lantern
Family:	Liliaceae
Synonyms:
Element Code:	PMLIL0D160
Full Name:	Calochortus pulchellus Benth.
USDA PLANTS Symbol:	CAPU2

Biology
Lifeform: perennial bulbiferous herb Blooming Period: April - June Habitat: • Chaparral • Cismontane woodland • Riparian woodland • Valley and foothill grassland

Rarity Status
Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 40
Element Occurrence Ranks:

A B C D X U

3 12 5 1 0 19

Population Status:

Historic >20 yrs	Recent <=20 yrs
16	24

Presence:

Present Extant	Possibly Extirpated	Extirpated
40	0	0

Notes

Threatened by grazing, urbanization, horticultural collection, and feral pigs. Potentially threatened by road maintenance. See Proceedings of the California Academy of Sciences III 2:118 (1901) for taxonomic treatment, and Journal of Ecology 75:977-995 (1987) for population biology.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2012-06-15

Location

Elevation: 30 - 840 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Alameda (ALA), Contra Costa (CCA), Solano (SOL)

Quads: name (DWR code) USGS code
Byron Hot Springs (463C) 37121G6, Antioch South (464A) 37121H7, Clayton (464B) 37121H8, Diablo (464C) 37121G8, Tassajara (464D) 37121G7, Walnut Creek (465A) 37122H1, Briones Valley (465B) 37122H2, Las Trampas Ridge (465D) 37122G1, Benicia (482C) 38122A2, Mt. Vaca (499A)? 38122D1, Mt. George (499C) 38122C2

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora Consortium of California Herbaria CalPhotos California Department of Fish and Wildlife: CNDDB Quick Viewer

Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website http://www.rareplants.cnps.org [accessed ].

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