Streptanthus glandulosus ssp. niger

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Scientific Name: Streptanthus glandulosus Hook. ssp. niger (Greene) Al-Shehbaz et al.
Common Name: Tiburon jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G0T0
USDA Plants Symbol:
Synonyms/Other Names: Streptanthus niger

Lifeform: annual herb

Blooming Period: May-Jun

Elevation:
30 - 150 meters
100 - 490 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Known from only two occurrences on the Tiburon Peninsula. Threatened by road construction, trampling, foot traffic, non-native plants, and development. See Bulletin of the Torrey Botanical Club 13:141 (1886) for original description, Madroño 14(7):217-227 (1958) for taxonomic treatment, and Systematic Botany 19(4):557-574 (1994) for discussion of S. glandulosus complex.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	2	100 %
Development	2	100%
Erosion/runoff	2	100%
Foot traffic/trampling	2	100%
Non-native plant impacts	2	100%
Other	2	100%
Road/trail construction/maint.	2	100%
Recreational use (non-ORV)	1	50%

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	2

California Endemic:

California Island:

States: Name (Code)
California (CA)

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

Quads: Name (Quad Code)
San Quentin (3712284)

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

Presumed Extant

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CNPS Rare Plant Inventory