Caulanthus flavescens

yellow-flowered thelypodium

Family:Brassicaceae

Rarity

CNPS-EB: A2

4 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

Key

Ecology

Flowers March - May

Habitats:

Serpentine or Serpentine-derived soils

All Caulanthus

C. flavescens

C. lemmonii (*A1x)

References

Synonyms

Guillenia flavescens
Streptanthus flavescens
Thelypodium flavescens

Populations

Key

Location	Pop ID	Last Recorded	Notes
Black Diamond Rgnl Preserve	1	2022-03-19
Lawrence Livermore Lab, Site 300, Corral Hollow	5	2021-12-31
Mt. Diablo State Park - West side	6	2022-03-10
Tesla, Corral Hollow	4	2023-05-06
Byron Hot Springs area	2	1914-12-31	Historic
Clayton area	3	1889-12-31	Historic
Los Vaqueros Watershed	9	1989-03-31	Historic
Marsh Creek - other or unknown sites	10	1907-12-31	Historic
Mt. Diablo State Park - West side	7	1992-04-05	Historic
Patterson Pass	11	1938-12-31	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.