Taxon Report

Astragalus hornii A. Gray var. hornii

Horn's milk-vetch

Print Report

Classification


Scientific Name:	Astragalus hornii A. Gray var. hornii
Common Name:	Horn's milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F421
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Oct	May-Oct
Elevation:	60-850 (195-2790)
General Habitats:	Meadows and seeps, Playas
Microhabitat:	Alkaline, Lake Margins
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	GUT1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	BLM_S
CRPR Changes:	added to 1B.1 on 2006-11-28 added to 1B.1 on 2006-11-27

Occurrence Data from the CNDDB


Total Occurrences:	28
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	3
Fair (C)	2
Poor (D)	0
None (X)	5
Unknown (U)	18

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Kern (KRN), Kings (KNG), Los Angeles (LAX), Orange (ORA), Riverside (RIV), San Bernardino (SBD)*
Quads: Name (Quad Code)
Anaheim (3311778), Arvin (3511827), Beaumont (3311688), Buttonwillow (3511944), Cathedral City (3311674), Conner (3511921), Fellows (3511925), Frazier Mtn. (3411878), Gosford (3511931), Grapevine (3411888), Lamont (3511838), Little Buttes (3411873), Lokern (3511945), Lone Pine (3611851), Lone Tree Well (3511976), Long Beach (3311872), Los Alamitos (3311871), Lost Hills NE (3511965), Newport Beach (3311768), Oildale (3511941), Palm Springs (3311675), Palm View Peak (3311665), Palmdale (3411851), Rancho Mirage (3311664), Ritter Ridge (3411852), San Bernardino South (3411713), Seal Beach (3311861), Semitropic (3511955), Stevens (3511932), Tupman (3511933), Union Wash (3611861), Wasco SW (3511954), Weed Patch (3511828), Willow Springs (3411883)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	6	21 %
Agriculture	3	10%
Development	2	7%
Other	1	3%

Notes



Subject to eradication efforts in early 1900's because it was poisonous to sheep. Threatened by habitat alteration. See Proceedings of the California Academy of Arts 7: 398 (1868) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2006-11-27

CRPR List Addition on 2006-11-28

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].