Allium unifolium

Rarity

CNPS-EB: B-PV

20 current natural populations

Criteria:

W Limit
Small Populations

Observations

Key

Ecology

Flowers May - June

Habitats:

Chaparral
Forest

All Allium

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Berkeley Hills	1	2023-05-27
Black Diamond - Markley Canyon	2	2021-04-22
EBMUD land on San Pablo Ridge	31	2021-05-16
Las Trampas Rgnl Wilderness	20	2023-05-20
Morgan Territory Rgnl Park	22	2022-05-01
Mt. Diablo State Park - North side	5	2002-05-06
Mt. Diablo State Park - North side	6	2007-05-17
Mt. Diablo State Park - North side	8	2021-04-26
Mt. Diablo State Park - South side	14	2018-05-26
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	11	2021-05-07
Mt. Diablo State Park - West of Mt. Zion	10	2003-05-08
Ohlone Rgnl Wilderness	23	2023-06-09
Ohlone Rgnl Wilderness	24	2023-06-09
Ohlone Rgnl Wilderness	25	2020-05-23
Round Valley Rgnl Park	27	2021-04-21
San Francisco Water District land, Sunol	28	2009-12-31
Siesta Valley, Upper - EBMUD land	32	2024-05-29
Sunol Rgnl Wilderness	29	2022-04-18
Vollmer Peak Area	34	2022-05-04
Wildcat Rgnl Park	36	2022-05-04
Chabot Rgnl Park	3	1982-05-31	Historic
Del Valle Regional Park	17	1999-12-31	Historic
Gateway area, EBMUD land	18	1999-05-31	Historic
Lily Spring, San Pablo Ridge - EBMUD land	19	1999-12-31	Historic
Los Vaqueros Watershed	21	1991-05-19	Historic
Mt. Diablo State Park - East side	4	1999-12-31	Historic
Mt. Diablo State Park - North side	7	1997-04-20	Historic
Mt. Diablo State Park - North side	9	1995-05-08	Historic
Mt. Diablo State Park - South side	15	1933-05-22	Historic
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	12	1991-04-28	Historic
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	13	1935-05-18	Historic
Mt. Diablo State Park - West side	16	1994-12-31	Historic
Redwood Rgnl Park	26	1999-12-31	Historic
San Ramon, East of 680	30	1996-12-31	Historic
Strawberry Canyon	33	1943-05-29	Historic
Tilden Rgnl Park - Jewel Lake/Nature area	35	1980-05-16	Historic

The list of populations shows the distinct populations identified by the CNPS-EB Rare and Unusual Plants Committee. The locations in this list are very general. More specific location details can be obtained from the links in the Observations section (for some of these links, a login is required).

Font

Populations in bold type have precise coordinates available for field volunteers and researchers.

Populations in normal type are only known from a description of the location; no precise coordinates are available.

Background

Populations with a white background have been observed in the last 25 years.

Populations with a blue background have not been observed for at least 25 years.

Populations with an orange background have an uncertain location or identification, or are planted.

Columns

Pop ID is a label that identifies the population. Many locations have more than one population of a species, and the population ID is used to distinguish them.