Species Details

Allium tuolumnense

Rawhide Hill onion

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Classification

Scientific Name: Allium tuolumnense (Traub) Denison & D. McNeal
Common Name: Rawhide Hill onion
Family:	Alliaceae
Element Code:	PMLIL022W0
USDA Plants Symbol:	ALTU
Synonyms/Other Names: Allium sanbornii Wood var. tuolumnense Ownbey & Aase

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Mar-May

Elevation:
300 - 600 meters
985 - 1970 feet

General Habitats:

Cismontane woodland (serpentinite)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from approximately twenty occurrences. Threatened by grazing, foot traffic, urbanization, road maintenance, and vehicles. See Plant Life 28:63 (1972) for original description, and Madroño 36(2):122-130 (1989) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	12
	Total EOs	% of EOs
EOs with Threat Listed:	16	64 %
Grazing	6	24%
Mining	5	20%
Foot traffic/trampling	5	20%
Improper burning regime	4	16%
Altered flood/tidal/hydrologic regime	3	12%
Other	3	12%
Recreational use (non-ORV)	3	12%
Road/trail construction/maint.	3	12%
Development	2	8%
Erosion/runoff	2	8%
ORV activity	2	8%
Vandalism/dumping/litter	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					25
A	B	C	D	X	U
3	7	1	0	0	14

Occurrence Status:
Historical >20 Years	15
Recent <=20 Years	10

Presence:
Presumed Extant	25
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Mariposa (MPA), Tuolumne (TUO)

Quads: Name (Quad Code)
Chinese Camp (3712074), Coulterville (3712062), Hornitos (3712052), Keystone (3712075), Moccasin (3712073), New Melones Dam (3712085), Sonora (3712084)

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