Taxon Report

Streptanthus brachiatus F.W. Hoffm. ssp. hoffmanii Dolan & LaPre

Freed's jewelflower

Print Report

Taxon Summary

Streptanthus brachiatus ssp. hoffmanii, commonly known as Freed's jewelflower, is a perennial herb in the Brassicaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 490 to 1220 meters. Streptanthus brachiatus ssp. hoffmanii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Streptanthus brachiatus F.W. Hoffm. ssp. hoffmanii Dolan & LaPre
Common Name:	Freed's jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G071
USDA Plants Symbol:	STBRH2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	490-1220 (1610-4005)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	13
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	6
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	2

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lake (LAK), Sonoma (SON)
Quads: Name (Quad Code)
Jericho Valley (3812274), Jimtown (3812267), Mount St. Helena (3812266), Whispering Pines (3812276), Wilson Valley (3812284)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	11	85 %
Mining	7	53%
Road/trail construction/maint.	6	46%
Other	2	15%
Recreational use (non-ORV)	1	7%
Erosion/runoff	1	7%

Notes



Known from approximately ten occurrences. See Madroño 36(1):36 (1989) for original description.
Threats:

Taxonomy:

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 5 February 2025].