Taxon Report

Streptanthus hesperidis Jeps.

green jewelflower

Print Report

Taxon Summary

Streptanthus hesperidis, commonly known as green jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Chaparral (openings), and Cismontane woodland, growing at elevations from 130 to 760 meters. Streptanthus hesperidis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Streptanthus hesperidis Jeps.
Common Name:	green jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G510
USDA Plants Symbol:	STHE6
Synonyms/Other Names:	Streptanthus breweri var. hesperidis

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jul	May-Jul
Elevation:	130-760 (425-2495)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Rocky, Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2G3
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	35
Element Occurrence Ranks:
Excellent (A)	3
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	31

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lake (LAK), Napa (NAP), Yolo (YOL)
Quads: Name (Quad Code)
Aetna Springs (3812264), Chiles Valley (3812253), Detert Reservoir (3812265), Jericho Valley (3812274), Knoxville (3812273), Middletown (3812275), Rutherford (3812244), St. Helena (3812254), Walter Springs (3812263), Whispering Pines (3812276), Yountville (3812243)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes



Threatened by mining. See Erythea 1:14 (1893) for original description, and Flora of California 2:33 (1936) by W.L. Jepson for revised nomenclature.
Threats:

Taxonomy:

Selected References

Streptanthus hesperidis profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 7 November 2025].