Taxon Report

Astragalus platytropis Gray

broad-keeled milk-vetch

Print Report

Taxon Summary

Astragalus platytropis, commonly known as broad-keeled milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Pinyon and juniper woodland, and Subalpine coniferous forest, growing at elevations from 2345 to 3550 meters. Astragalus platytropis is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Astragalus platytropis Gray
Common Name:	broad-keeled milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F6X0
USDA Plants Symbol:	ASPL3
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	2345-3550 (7695-11650)
General Habitats:	Alpine boulder and rock field, Pinyon and juniper woodland, Subalpine coniferous forest
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	18
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	17

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Blanco Mtn. (3711842), Fales Hot Springs (3811934), Last Chance Mtn. (3711736), Mazourka Peak (3611881), Mt. Patterson (3811943), Pickel Meadow (3811935), Tin Mountain (3611784)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	2	11 %
Foot traffic/trampling	2	11%
Grazing	2	11%
ORV activity	2	11%
Recreational use (non-ORV)	1	5%
Mining	1	5%

Notes



Threatened by grazing, trampling, and vehicles. On review list in OR. See Proceedings of the American Academy of Arts and Sciences 6:526 (1865) for original description, and Memoirs of the New York Botanical Garden 13:979-981 (1964) for taxonomic treatment.
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 October 2025].