Species Details

Astragalus ertterae

Walker Pass milk-vetch

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Species Description:

Astragalus ertterae, commonly known as Walker Pass milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Pinyon and juniper woodland (granitic, and sandy), growing at elevations from 1705 to 1900 meters. Astragalus ertterae is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Astragalus ertterae Barneby & Shevock
Common Name: Walker Pass milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0FB30
USDA Plants Symbol:	ASER6
Synonyms/Other Names:
Name Status:	JEP, 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:	BLM_S; SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Apr-May

Elevation:
1705 - 1900 meters
5595 - 6235 feet

General Habitats:

Pinyon and juniper woodland (granitic, sandy)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known in CA from only the Walker Pass area. See Aliso 11(4):585-588 (1987) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	4
	Total EOs	% of EOs
EOs with Threat Listed:	3	75 %
Grazing	3	75%
Road/trail construction/maint.	2	50%
Foot traffic/trampling	1	25%
Recreational use (non-ORV)	1	25%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					4
A	B	C	D	X	U
2	2	0	0	0	0

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	1

Presence:
Presumed Extant	4
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Kern (KRN)

Quads: Name (Quad Code)
Walker Pass (3511861)

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