Species Details

Calochortus excavatus

Inyo County star-tulip

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Classification

Scientific Name: Calochortus excavatus Greene
Common Name: Inyo County star-tulip
Family:	Liliaceae
Element Code:	PMLIL0D0F0
USDA Plants Symbol:	CAEX2
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_SBBG; USFS_S
CRPR Changes: changed from 1B.1 to 1B.1 on 2011-01-26
Add Date:	1974-01-01
Date Edited:	2023-06-06

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Apr-Jul

Elevation:
1150 - 2000 meters
3775 - 6560 feet

General Habitats:

Chenopod scrub
Meadows and seeps

Microhabitat Details:

Microhabitat:

Alkaline
Mesic

Notes

Notes: Most occurrences are small remnants of former populations. Threatened by groundwater pumping, development, non-native plants, road maintenance, and grazing. See Pittonia 2:71 (1890) for original description, and Proceedings of the California Academy of Sciences III 2:146 (1901) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	45	64 %
Grazing	40	57%
Recreational use (non-ORV)	4	5%
Road/trail construction/maint.	3	4%
Other	3	4%
Groundwater pumping	3	4%
Non-native plant impacts	2	2%
Vandalism/dumping/litter	2	2%
ORV activity	1	1%
Improper burning regime	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					70
A	B	C	D	X	U
1	21	25	5	0	18

Occurrence Status:
Historical >20 Years	38
Recent <=20 Years	32

Presence:
Presumed Extant	70
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)

Quads: Name (Quad Code)
Benton Hot Springs (3711875), Big Alkali (3811922), Big Pine (3711823), Bishop (3711834), Blackrock (3611882), Chalfant Valley (3711853), Chidago Canyon (3711854), Convict Lake (3711857), Deep Springs Lake (3711831), Fish Slough (3711844), Fish Springs (3711813), Independence (3611872), Kearsarge Peak (3611873), Laws (3711843), Lone Pine (3611851), Manzanar (3611862), Poleta Canyon (3711833), Rovana (3711845), Tinemaha Reservoir (3711812), Toms Place (3711856), Union Wash (3611861), Westgard Pass (3711832)

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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Selected References

CNPS Status Review:

Proposed Change from CRPR 1B.1, G2G3 to 1B.2, G2 / S2 (2011)