Taxon Details

Streptanthus batrachopus

Tamalpais jewelflower

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Taxon Summary:

Streptanthus batrachopus, commonly known as Tamalpais jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Chaparral, and Closed-cone coniferous forest, growing at elevations from 305 to 650 meters. Streptanthus batrachopus is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Streptanthus batrachopus Morrison
Common Name: Tamalpais jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G050
USDA Plants Symbol:	STBA4
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	SB_UCSC
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jul

Elevation:
305 - 650 meters
1000 - 2135 feet

General Habitats:

Closed-cone coniferous forest
Chaparral

Microhabitat Details:

Microhabitat:

Serpentine

Notes

Notes: Known from fewer than ten occurrences in the Mt. Tamalpais area. Similar plants from the southern North Coast Ranges may be an undescribed new taxon. Intergrades with S. barbiger.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	3	38 %
Foot traffic/trampling	3	37%
Other	1	12%
Recreational use (non-ORV)	1	12%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					8
A	B	C	D	X	U
1	2	2	0	0	3

Occurrence Status:
Historical >20 Years	5
Recent <=20 Years	3

Presence:
Presumed Extant	8
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Marin (MRN)

Quads: Name (Quad Code)
Bolinas (3712286), San Geronimo (3812216), San Rafael (3712285)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory