Species Details

Allium tuolumnense

Rawhide Hill onion

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Photo of Allium tuolumnense
© 2010 Steven Perry
Photo of Allium tuolumnense
© 2005 Dean Wm. Taylor
Photo of Allium tuolumnense
© 1999 John Game
Lifeform: perennial bulbiferous herb
Blooming Period: Mar-May
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Elevation:
300 - 600 meters
985 - 1970 feet
General Habitats:
  • Cismontane woodland (serpentinite)
Microhabitat Details:
Microhabitat:
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 MadroƱo 36(2):122-130 (1989) for revised nomenclature.
Threats:
Taxonomy:
Threat List Total: 12
Total EOs % of EOs
EOs with Threat Listed: 16 64 %
THREAT LIST:
Grazing 6 24%
Mining 5 20%
Foot traffic/trampling 5 20%
Improper burning regime 4 16%
Altered flood/tidal/hydrologic regime 3 12%
Total Occurrences: 25
Element Occurrence Ranks:
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
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.
Presumed Extant
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