Species Details

Astragalus hornii var. hornii

Horn's milk-vetch

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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:

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	GUT1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes: added to 1B.1 on 2006-11-28 added to 1B.1 on 2006-11-27
Add Date:	2006-12-01
Date Edited:	2021-08-25

Ecology and Life History

Lifeform: annual herb

Blooming Period: May-Oct

Elevation:
60 - 850 meters
195 - 2790 feet

General Habitats:

Meadows and seeps
Playas

Microhabitat Details:

Microhabitat:

Alkaline
Lake Margins

Notes

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:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					28
A	B	C	D	X	U
0	3	2	0	5	18

Occurrence Status:
Historical >20 Years	23
Recent <=20 Years	5

Presence:
Presumed Extant	23
Possibly Extirpated	0
Presumed Extirpated	5

Location

California Endemic:

California Island:

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

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)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

Selected References

CNPS Status Review:	CRPR List Addition on 2006-11-27
CNPS Status Review:	CRPR List Addition on 2006-11-28