Taxon Report

Astragalus kentrophyta Gray var. danaus (Barneby) Barneby

Sweetwater Mountains milk-vetch

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Taxon Summary

Astragalus kentrophyta var. danaus, commonly known as Sweetwater Mountains milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Subalpine coniferous forest (rocky, and talus), growing at elevations from 3000 to 3660 meters. Astragalus kentrophyta var. danaus is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Astragalus kentrophyta Gray var. danaus (Barneby) Barneby
Common Name:	Sweetwater Mountains milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F4J2
USDA Plants Symbol:	ASKED
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	3000-3660 (9845-12010)
General Habitats:	Alpine boulder and rock field, Subalpine coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G5T4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: False
California Counties and Islands: Name (Code)
Alpine (ALP), Fresno (FRE), Inyo (INY), Madera (MAD), Mariposa (MPA), Mono (MNO), Tuolumne (TUO)
Quads: Name (Quad Code)
Aberdeen (3611883), Benton (3711874), Bloody Mtn. (3711858), Buckeye Ridge (3811924), Dunderberg Peak (3811913), Kearsarge Peak (3611873), Koip Peak (3711972), Mount Dana (3711982), Mount Tom (3711836), Mt. Barcroft (3711852), Mt. Clarence King (3611874), Mt. Patterson (3811943), Mt. Pinchot (3611884), Sonora Pass (3811936), Sweetwater Creek (3811942), Tioga Pass (3711983), Twin Lakes (3811923), Vogelsang Peak (3711973)

Threat List Data from the CNDDB


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

Notes



See Leaflets of Western Botany 6 (5):154 (1951) for revised nomenclature, and Memoirs of the New York Botanical Garden 6(2):95 (1964) for original description.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 26 August 2025].