Species Details

Astragalus tidestromii

Tidestrom's milk-vetch

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Species Description:

Astragalus tidestromii, commonly known as Tidestrom's milk-vetch, is a perennial herb in the Fabaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, growing at elevations from 600 to 1785 meters. Astragalus tidestromii is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Astragalus tidestromii (Rydb.) Clokey
Common Name: Tidestrom's milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F8X0
USDA Plants Symbol:	ASTI
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.2
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S2
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes: added to 2.2 on 2009-01-05
Add Date:	2009-01-06
Date Edited:	2023-05-02

Ecology and Life History

Lifeform: perennial herb

Blooming Period: (Jan)Apr-Jul

Elevation:
600 - 1785 meters
1970 - 5855 feet

General Habitats:

Mojavean desert scrub

Microhabitat Details:

Microhabitat:

Carbonate
Gravelly (sometimes)
Sandy (sometimes)

Notes

Notes: Threatened by mining and solar energy development. Possibly threatened by vehicles, road maintenance, and non-native plants. Similar to A. layneae.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	10
	Total EOs	% of EOs
EOs with Threat Listed:	42	58 %
Non-native plant impacts	21	29%
ORV activity	10	13%
Road/trail construction/maint.	10	13%
Non-native animal impacts	6	8%
Other	5	6%
Mining	3	4%
Development	2	2%
Erosion/runoff	2	2%
Grazing	2	2%
Biocides	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					72
A	B	C	D	X	U
2	23	15	4	0	28

Occurrence Status:
Historical >20 Years	11
Recent <=20 Years	61

Presence:
Presumed Extant	72
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

California Counties and Islands: Name (Code)
Inyo (INY), San Bernardino (SBD)

Quads: Name (Quad Code)
Big Bear City (3411637), Blackwater Mine (3511577), Calvada Springs (3511588), Clark Mtn. (3511555), Darwin (3611735), East of Kingston Peak (3511567), East of Kingston Spring (3511557), Ivanpah Lake (3511554), Kingston Peak (3511568), Kingston Spring (3511558), Mescal Range (3511545), Mesquite Lake (3511565), Mesquite Mountains (3511566), Mound Spring (3611518), Nopah Peak (3611611), North of Tecopa Pass (3511681), Pachalka Spring (3511556), Santa Rosa Flat (3611746), Solomons Knob (3511547), State Line Pass (3511564), Stump Spring, Nev. (3511587), Turquoise Mtn. (3511548), Valley Wells (3511546)

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

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CNPS Rare Plant Inventory