Delphinium hesperium subsp. hesperium

western larkspur

Family:Ranunculaceae

Rarity

CNPS-EB: B

12 current natural populations

Observations

Key

Ecology

Flowers March - June

Habitats:

Woodland

All Delphinium

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Black Diamond - Sommersville	2	2015-04-09
Los Vaqueros Watershed	15	2004-04-06
Morgan Territory Rgnl Park	13	2024-06-05
Mt. Diablo State Park - North side	6	2022-04-17
Mt. Diablo State Park - North side	7	2011-06-20
Mt. Diablo State Park - South side	9	2000-05-16
Mt. Diablo State Park - South side	11	2006-06-13
Mt. Diablo State Park - West of Mt. Zion	8	2003-05-08
Mt. Wanda, Martinez	18	2002-05-24
Round Valley Rgnl Park	14	2021-04-28
Tilden Rgnl Park - San Pablo Ridge	20	2021-05-17
Vasco Hills	17	2010-05-19
Black Diamond Rgnl Preserve	1	1998-05-13	Historic
Horse Valley - W of Brentwood, S of Antioch	16	1998-12-31	Historic
Lawrence Livermore Lab, Site 300, Corral Hollow	3	1986-12-31	Historic
Mt. Diablo State Park - East side	4	1996-04-14	Historic
Mt. Diablo State Park - East side	5	1993-05-08	Historic
Mt. Diablo State Park - South side	10	1995-05-29	Historic
Mt. Diablo State Park - West side	12	1938-05-25	Historic
Sand Creek	21	2002-12-31	ID Uncertain
Siesta Valley, Upper - EBMUD land	19	1995-12-31	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.