Helianthus gracilentus

slender sunflower

Family:Asteraceae

Rarity

CNPS-EB: B

11 current natural populations

Criteria:

Narrow Range in ALA & CCA
N Limit
E Limit
Fire Follower

Observations

Key

Ecology

Flowers April - October

Habitats:

Burns
Open Dry Slope

All Helianthus

H. californicus (B)
H. gracilentus

References

Populations

Key

Location	Pop ID	Last Recorded	Notes
Lime Ridge area	3	2021-04-30
Los Vaqueros Watershed	11	2023-09-27
Los Vaqueros Watershed	13	2022-04-10
Los Vaqueros Watershed	15	2022-05-04
Morgan Territory Rgnl Park	12	2022-03-12
Mt. Diablo State Park - North side	9	2020-06-04
Mt. Diablo State Park - North side	10	2020-05-12
Mt. Diablo State Park - South side	4	2005-04-23
Mt. Diablo State Park - South side	7	2024-06-01
Mt. Diablo State Park - West side	8	2001-05-08
Shell Ridge	14	2022-05-08
Mt. Diablo State Park - North side	1	1932-12-31	Historic
Mt. Diablo State Park - North side	2	1935-12-31	Historic
Mt. Diablo State Park - South side	5	1933-05-11	Historic
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo	6	1994-12-31	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.