Flora of North America species comparison

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Astragalus praelongus var. avonensis
Photo is of parent taxon

avon milkvetch
Flowers

11–14(–16) mm;

calyx lobes triangular-subulate, (0.8–)1–1.9(–2.8) mm;

corolla pale lemon yellow, keel immaculate.
Legumes

ellipsoid, 18–33 × 9–11 mm, puberulent;

stipe thick, to 1.5 mm.
Stipules

connate at proximal nodes (or completely amplexicaul) or distinct throughout.

Astragalus praelongus var. avonensis
Phenology Flowering May.
Habitat Stabilized dunes and silty-sandy wind-blown hummocks in playa and saline lake bottoms, greasewood, sagebrush-rabbitbrush, mixed desert shrub communities.
Elevation 1400–1600 m. (4600–5200 ft.)
Distribution
from FNA
UT
Discussion

Variety avonensis is apparently a smaller version of var. praelongus, more or less isolated along the floor of the Escalante Valley in Beaver, Iron, and Millard counties, which was submerged until a few thousand years ago by a shallow arm of Pleistocene Lake Bonneville.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Preussiani > Astragalus praelongus
Sibling taxa
A. praelongus var. ellisiae, A. praelongus var. lonchopus, A. praelongus var. praelongus
Synonyms A. avonensis
Name authority (S. L. Welsh & N. D. Atwood) S. L. Welsh: N. Amer. Sp. Astragalus, 190. (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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