Taxon Report

Streptanthus anomalus D. L. Smith, A. Arthur, & R. E. Preston

Mount Burdell jewelflower

Print Report

Taxon Summary

Streptanthus anomalus, commonly known as Mount Burdell jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Cismontane woodland, growing at elevations from 50 to 150 meters. Streptanthus anomalus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Streptanthus anomalus D. L. Smith, A. Arthur, & R. E. Preston
Common Name:	Mount Burdell jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G520
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jun	May-Jun
Elevation:	50-150 (165-490)
General Habitats:	Cismontane woodland
Microhabitat:	Openings, Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	added to 1B.1 on 2019-08-21

Occurrence Data from the CNDDB


Total Occurrences:	2
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	2

Location


California Endemic: True
California Counties and Islands: Name (Code)
Marin (MRN)
Quads: Name (Quad Code)
Petaluma (3812226), Petaluma River (3812225)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	2	100 %
Grazing	2	100%
Foot traffic/trampling	1	50%

Notes




Threats:
Threatened by grazing and trampling. Potentially threatened by recreational activities.
Taxonomy:
Similar to S. glandulosus and S. tortuosus; distinguished by conspicuous ovate, deeply clasping distal leaves that bract the inflorescence below or above the proximal flower. See Madroño 66(1):24-29 (2019) for original description.

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 26 October 2025].