Species Details

Astragalus pseudiodanthus

Tonopah milk-vetch

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Species Description:

Astragalus pseudiodanthus, commonly known as Tonopah milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Great Basin scrub, growing at elevations from 2025 to 2075 meters. Astragalus pseudiodanthus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Astragalus pseudiodanthus Barneby
Common Name: Tonopah milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F750
USDA Plants Symbol:	ASPS
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2Q
State Rank:	S2
Other Status:	BLM_S; SB_CalBG/RSABG; SB_SBBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Jun

Elevation:
2025 - 2075 meters
6645 - 6810 feet

General Habitats:

Great Basin scrub (stabilized dunes)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known in CA from fewer than ten occurrences. Threatened by grazing. See Leaflets of Western Botany 3:99 (1942) for original description, and Systematic Botany 8:422 (1983) for alternate taxonomic treatment as A. iodanthus var. pseudiodanthus.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	7	88 %
Grazing	7	87%
Road/trail construction/maint.	1	12%

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	7
Recent <=20 Years	1

Presence:
Presumed Extant	8
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
Mono (MNO)

Quads: Name (Quad Code)
Alameda Well (3811817), Cedar Hill (3811827), Kirkwood Spring (3811828)

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