Flora of North America species comparison

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Astragalus hallii var. hallii
Photo is of parent taxon

Hall's milkvetch
Herbage

usually green, rarely subcinereous, villosulous or loosely strigulose, hairs to 0.5–0.8(–1) mm.
Stems

decumbent or prostrate with ascending tips.
Leaflets

(13–)19–27(–31).
Peduncles

usually ascending, spreading, or declined, rarely prostrate (in fruit).
Corollas

purple or reddish violet.
Legumes

humistrate, narrowly oblong-ellipsoid, oblanceoloid-ellipsoid, or subclavately ellipsoid, not distinctly inflated, (12–)13–24(–27) × (3–)4–7(–8.5) mm, glabrous or sparsely strigulose;

stipe 1–2 mm.
Seeds

20–30.
2n

= 22.

Astragalus hallii var. hallii
Phenology Flowering Jun–Sep.
Habitat Hillsides, meadows, sagebrush communities, mixed conifer-aspen communities.
Elevation 2300–3100 m. (7500–10200 ft.)
Distribution
from FNA
AZ; CO; NM; OK
[BONAP county map]
Discussion

Variety hallii occurs in central, south-central, and southwestern Colorado, north-central and northwestern New Mexico, and just into Arizona (Apache County), and is disjunct in Oklahoma (Cimarron County).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus hallii
Sibling taxa
A. hallii var. fallax
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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