Senecio flaccidus var. douglasii

Douglas' threadleaf ragwort, shrubby butterweed

Family:Asteraceae

Rarity

CNPS-EB: A2

14 current natural populations

Criteria:

Small Populations

Observations

Key

Ecology

Habitats:

Dry Wash
Rock, Tallus, Scree
Sand, Sandstone

All Senecio

S. aphanactis (*A1x)
S. aronicoides (B-PV)
S. flaccidus var. douglasii
S. hydrophilus (A2)

References

Synonyms

Senecio douglasii var. tularensis
Senecio douglasii

Populations

Key

Location	Pop ID	Last Recorded	Notes
Antioch Dunes	2	2023-03-30
Antioch Dunes	18	2023-11-08
Calaveras Reservoir, SFWD	11	2009-06-17
Corral Hollow Area	3	2002-07-07
Lawrence Livermore Lab, Site 300, Corral Hollow	19	2021-12-31
Ohlone Rgnl Wilderness	10	2003-08-25
Ohlone Rgnl Wilderness	12	2021-10-18
Ohlone Rgnl Wilderness	14	2022-03-25
Patterson Pass	5	2000-10-14
San Francisco Water District land, Sunol	7	2003-06-02
Sunol Rgnl Wilderness	13	2021-11-29
Sunol Rgnl Wilderness	15	2022-06-03
Sunol Rgnl Wilderness	16	2022-06-03
Sunol Rgnl Wilderness	17	2023-10-01
Antioch - other or unknown sites	1	1923-12-31	Historic
Mines Road/Arryo Mocho	4	1933-12-31	Historic
Sunol Rgnl Wilderness	6	1966-09-20	Historic
Sunol Valley	8	1916-12-31	Historic
Sycamore Grove Rgnl Park - LAPRD	9	1991-02-24	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.