Leptosiphon ambiguus

serpentine leptosiphon, serpentine linanthus

Family:Polemoniaceae

Rarity

CNPS-EB: *A2
State CNPS: 4.2
Global Rank: G4
CNDDB Rank: S4

22 current natural populations

Criteria:

Limited/Threatened Habitat
N Limit

Observations

Key

Ecology

Flowers April - May

Habitats:

Grassland (Annual or Perennial)
Serpentine or Serpentine-derived soils

All Leptosiphon

References

Synonyms

Linanthus ambiguus

Populations

Key

Location	Pop ID	Last Recorded	Notes
Calaveras Reservoir, SFWD	5	2013-12-31
Cedar Mountain	1	2012-05-19
Los Mochos Boy Scout Camp, Mines Rd	2	2023-04-30
Los Mochos Boy Scout Camp, Mines Rd	30	2023-04-29
Mines Road/Arryo Mocho	3	2024-05-06
Mt. Diablo State Park - East side	22	2005-05-06
Mt. Diablo State Park - North side	19	2005-04-26
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	21	2014-05-11
Ohlone Rgnl Wilderness	9	2024-04-19
Ohlone Rgnl Wilderness	10	2002-04-27
Ohlone Rgnl Wilderness	11	2020-05-23
Ohlone Rgnl Wilderness	12	2021-04-22
Ohlone Rgnl Wilderness	14	2023-06-09
Ohlone Rgnl Wilderness	17	2013-12-31
Ohlone Rgnl Wilderness	24	2021-04-30
Ohlone Rgnl Wilderness	27	2022-05-16
Ohlone Rgnl Wilderness	28	2022-05-17
Sunol Rgnl Wilderness	7	2024-04-24
Sunol Rgnl Wilderness	23	2021-05-01
Sunol Rgnl Wilderness	25	2021-04-12
Sunol Rgnl Wilderness	26	2021-04-12
Tarraville Creek, Mines Rd	4	2016-06-02
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	20	1991-04-28	Historic
Ohlone Rgnl Wilderness	13	1995-06-02	Historic
Ohlone Rgnl Wilderness	15	1992-05-24	Historic
Ohlone Rgnl Wilderness	16	1998-04-27	Historic
Ohlone Rgnl Wilderness	18	1996-05-06	Historic
San Francisco Water District land, Sunol	6	1997-04-13	Historic
Sunol Rgnl Wilderness	8	1993-05-22	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.