Taxon Details

Astragalus breweri

Brewer's milk-vetch

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Taxon Summary:

Astragalus breweri, commonly known as Brewer's milk-vetch, is a annual herb in the Fabaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Meadows and seeps, Valley and foothill grassland (openings, and often gravelly), growing at elevations from 90 to 730 meters. Astragalus breweri is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification

Scientific Name: Astragalus breweri Gray
Common Name: Brewer's milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F1J0
USDA Plants Symbol:	ASBR8
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.2
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jun

Elevation:
90 - 730 meters
295 - 2395 feet

General Habitats:

Chaparral
Cismontane woodland
Meadows and seeps
Valley and foothill grassland (openings, often gravelly)

Microhabitat Details:

Microhabitat:

Serpentine (often)
Volcanic

Notes

Notes: Populations have been lost to development and road construction. Threatened by development and non-native plants. See Systematic Botany 17(3):367-379 (1992) for distributional information.
Threats:
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					0
A	B	C	D	X	U
0	0	0	0	0	0

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

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Colusa (COL), Lake (LAK), Marin (MRN), Mendocino (MEN), Napa (NAP), Sonoma (SON)

Quads: Name (Quad Code)
Aetna Springs (3812264), Bolinas (3712286), Calistoga (3812255), Chiles Valley (3812253), Highland Springs (3812288), Jericho Valley (3812274), Jimtown (3812267), Kelseyville (3812287), Lakeport (3912218), Leesville (3912224), Middletown (3812275), Potter Valley (3912331), San Rafael (3712285), St. Helena (3812254), The Geysers (3812277), Upper Lake (3912228), Walter Springs (3812263), Whispering Pines (3812276), Wilbur Springs (3912214), Yorkville (3812382)

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