Astragalus praelongus var. avonensis
Astragalus praelongus var. lonchopus
avon milkvetch
longstipe stinking milkvetch, stinking milkvetch
11–14(–16) mm;
calyx lobes triangular-subulate, (0.8–)1–1.9(–2.8) mm;
corolla pale lemon yellow, keel immaculate.
15–24 mm;
calyx lobes subulate or lanceolate-attenuate, 3–6.5 mm;
corolla ochroleucous, keel often faintly to definitely maculate.
ellipsoid, 18–33 × 9–11 mm, puberulent;
stipe thick, to 1.5 mm.
ellipsoid, oblong-ellipsoid, ellipsoid-cylindroid, or narrowly clavate-ellipsoid, 20–30 × 6–9 mm, strigulose;
stipe 4.5–8 mm.
connate at proximal nodes (or completely amplexicaul) or distinct throughout.
distinct throughout.
Astragalus praelongus var. avonensis
Astragalus praelongus var. lonchopus
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.)
Variety lonchopus ranges from the Four Corners region to approximately 160 km to the west.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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