Flora of North America species comparison

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Astragalus oophorus var. wilkenii
Photo is of parent taxon

Wilken's milkvetch
Leaflets

9–21.
Flowers

16–20 mm;

calyx broadly campanulate, often sparsely black-strigulose, sometimes glabrous, tube 5.8–7.8 × 5 mm, lobes 3.6–5 mm;

corolla ochroleucous (concolorous).
Legumes

asymmetric, semi-ovoid or semi-ellipsoid, (25–)30–40 mm, sutures gently concave ventrally, straight or strongly convex in profile;

gynophore 6–10.5 mm.

Astragalus oophorus var. wilkenii
Phenology Flowering May–Jun.
Habitat Sagebrush, oak, pinyon-juniper, and mountain brush communities.
Elevation 1800–2500 m. (5900–8200 ft.)
Distribution
from FNA
CO
Discussion

Variety wilkenii occurs in western Colorado and is supported by a more or less convincing subset of specimens placed historically within var. caulescens. That variety is distantly disjunct by more than 200 km, with its entire range in western and southwestern Utah, north-central and northwestern Arizona, and east-central Nevada.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Megacarpi > Astragalus oophorus
Sibling taxa
A. oophorus var. caulescens, A. oophorus var. clokeyanus, A. oophorus var. lavinii, A. oophorus var. lonchocalyx, A. oophorus var. oophorus
Name authority S. L. Welsh: N. Amer. Sp. Astragalus, 257. (2007)
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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