Taxon Details

Calochortus umbellatus

Oakland star-tulip

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Taxon Summary:

Calochortus umbellatus, commonly known as Oakland star-tulip, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, Lower montane coniferous forest, and Valley and foothill grassland, growing at elevations from 100 to 700 meters. Calochortus umbellatus is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification

Scientific Name: Calochortus umbellatus A.W. Wood
Common Name: Oakland star-tulip
Family:	Liliaceae
Element Code:	PMLIL0D1E0
USDA Plants Symbol:	CAUM
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.2
Fed List:	None
State List:	None
Global Rank:	G3?
State Rank:	S3?
Other Status:	SB_UCBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-09-27

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Mar-May

Elevation:
100 - 700 meters
330 - 2295 feet

General Habitats:

Broadleafed upland forest
Chaparral
Cismontane woodland
Lower montane coniferous forest
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Serpentine (often)

Notes

Notes: Possibly threatened by recreational activities. See Proceedings of the Academy of Natural Sciences of Philadelphia 20(6):168 (1868) for original description, and Proceedings of the California Academy of Sciences III 2:123-124 (1901) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					0
A	B	C	D	X	U
0	0	0	0	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Marin (MRN), San Mateo (SMT), Santa Clara (SCL)

Quads: Name (Quad Code)
Bolinas (3712286), Briones Valley (3712282), Diablo (3712178), Hayward (3712261), Las Trampas Ridge (3712271), Lick Observatory (3712136), Mt. Day (3712146), Novato (3812215), Oakland East (3712272), Point Reyes NE (3812227), Richmond (3712283), San Geronimo (3812216), San Mateo (3712253), San Quentin (3712284), San Rafael (3712285), Walnut Creek (3712281), Woodside (3712243)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory