CNPS Inventory Plant Detail

Allium tribracteatum

Common Name:	three-bracted onion
Family:	Alliaceae
Synonyms:
Element Code:	PMLIL022D0
Full Name:	Allium tribracteatum Torr.
USDA PLANTS Symbol:	ALTR2

Biology
Lifeform: perennial bulbiferous herb Blooming Period: April - August Habitat: volcanic. • Chaparral • Lower montane coniferous forest • Upper montane coniferous forest

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 36
Element Occurrence Ranks:

A B C D X U

3 7 3 0 0 23

Population Status:

Historic >20 yrs	Recent <=20 yrs
5	31

Presence:

Present Extant	Possibly Extirpated	Extirpated
36	0	0

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. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1988-01-01 Last Update: 2011-02-08

Location

Elevation: 1100 - 3000 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Calaveras (CAL), Tuolumne (TUO)

Quads: name (DWR code) USGS code
Tiltill Mtn. (472C) 38119A6, Pinecrest (473B) 38119B8, Kibbie Lake (473D) 38119A7, Strawberry (474A) 38120B1, Crandall Peak (474B) 38120B2, Twain Harte (474C) 38120A2, Hull Creek (474D) 38120A1, Stanislaus (475A) 38120B3, Columbia Se (475D) 38120A3, Tamarack (491A) 38120D1, Boards Crossing (491C) 38120C2, Liberty Hill (491D) 38120C1, Devils Nose (492B) 38120D4

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-120.0,38.125