Taxon Details

Astragalus nyensis

Nye milk-vetch

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Taxon Summary:

Astragalus nyensis, commonly known as Nye milk-vetch, is a annual herb in the Fabaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, growing at elevations from 790 to 815 meters. Astragalus nyensis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Astragalus nyensis Barneby
Common Name: Nye milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F660
USDA Plants Symbol:	ASNY2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G3?
State Rank:	S1
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:
Add Date:	2011-12-27
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-May

Elevation:
790 - 815 meters
2590 - 2675 feet

General Habitats:

Mojavean desert scrub

Microhabitat Details:

Microhabitat:

Alkaline (sometimes)
Gravelly
Sandy

Notes

Notes: Discovered in CA in 2011; known in CA only from Pahrump Valley. Seriously threatened by solar energy development. Possibly threatened by non-native plants. Similar to A. acutirostris and A. nuttallianus var. imperfectus. Not in The Jepson Manual (1993) and TJM 2. See Leaflets of Western Botany 3(5):97-114 (1942) for original description, and Leaflets of Western Botany 7(8):192-196 (1954) and Brittonia 42(2):100-104 (1990) for taxonomic treatments.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	19	100 %
Non-native plant impacts	19	100%
ORV activity	18	94%
Development	1	5%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					19
A	B	C	D	X	U
0	8	9	2	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	19

Presence:
Presumed Extant	19
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Nevada (NV), Utah (UT)

California Counties and Islands: Name (Code)
Inyo (INY)

Quads: Name (Quad Code)
Calvada Springs (3511588), Mound Spring (3611518), Stump Spring, Nev. (3511587)

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