Species Details

Allium tribracteatum

three-bracted onion

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Photo of Allium tribracteatum
© 2018 Sierra Pacific Industries
Photo of Allium tribracteatum
© 2011 Barry Breckling
Photo of Allium tribracteatum
© 2004 Dean Wm. Taylor
Scientific Name:
Allium tribracteatum Torr.
Common Name:
three-bracted onion
Family: Alliaceae
Element Code: PMLIL022D0
USDA Plants Symbol: ALTR2
Synonyms/Other Names:
Lifeform: perennial bulbiferous herb
Blooming Period: Apr-Aug
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Elevation:
1100 - 3000 meters
3610 - 9845 feet
General Habitats:
  • Chaparral
  • Lower montane coniferous forest
  • Upper montane coniferous forest
Microhabitat Details:
Microhabitat:
  • Volcanic
Notes:
Threatened by vehicles. See Report of the Pacific Railroad Expedition 4:148 (1857) for original description, and Aliso 11(1):27-35 (1985) for revised treatment.
Threats:
Taxonomy:
Threat List Total: 11
Total EOs % of EOs
EOs with Threat Listed: 23 61 %
THREAT LIST:
ORV activity 12 31%
Logging 11 28%
Other 7 18%
Road/trail construction/maint. 6 15%
Recreational use (non-ORV) 5 13%
Total Occurrences: 38
Element Occurrence Ranks:
A B C D X U
5 9 2 2 0 20
Occurrence Status:
Historical >20 Years 21
Recent <=20 Years 17
Presence:
Presumed Extant 38
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alpine (ALP), Calaveras (CAL), El Dorado (ELD), Tuolumne (TUO)
Quads: Name (Quad Code)
Boards Crossing (3812032), Crandall Peak (3812022), Dardanelle (3811937), Devils Nose (3812044), Garnet Hill (3812043), Hull Creek (3812011), Kibbie Lake (3811917), Lake Eleanor (3711987), Liberty Hill (3812031), Mokelumne Peak (3812051), Pyramid Peak (3812072), Strawberry (3812021), Tamarack (3812041), Tiltill Mtn. (3811916), Tragedy Spring (3812062), Twain Harte (3812012)
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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