Taxon Report

Astragalus kentrophyta A. Gray var. ungulatus M.E. Jones

spiny milk-vetch

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Taxon Summary

Astragalus kentrophyta var. ungulatus, commonly known as spiny milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland, growing at elevations from 2149 to 2149 meters. Astragalus kentrophyta var. ungulatus is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Astragalus kentrophyta A. Gray var. ungulatus M.E. Jones
Common Name:	spiny milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F4JB
USDA Plants Symbol:	ASKEU
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun	Jun
Elevation:	2149-2149 (7050-7050)
General Habitats:	Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G5T3T4
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12 added to 2.2 on 2008-02-05

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Mono (MNO)
Quads: Name (Quad Code)
Cedar Hill (3811827)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	1	100 %
Grazing	1	100%
Logging	1	100%

Notes



Possibly threatened by grazing and logging. Not in The Jepson Manual (1993). See Madrono 54(2): 204 for first record in CA.
Threats:

Taxonomy:

Selected References

Proposed Addition to CRPR 2.2, G5T3T4 / S1.2 (2008)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 24 November 2025].