Astragalus bisulcatus var. major
Johnson Canyon milkvetch, twogrooved milkvetch
15–19, (5–)10–25 mm.
20–34-flowered;
axis 3–9 cm in fruit;
bracts 2.5–4 mm.
11–15 mm;
calyx usually white, tube 3.5–5.5(–7) mm, lobes narrowly subulate, (1.5–)1.8–3.8 mm;
corolla white or whitish and keel tip maculate, banner sometimes with purple center and purple lines, or suffused with pale purple throughout;
banner longer than keel.
linear- or narrowly oblong-ellipsoid, 8–13.5 × 2.2–3.7 mm, smooth, glabrous or strigulose;
stipe 4–5.2 mm.
4–10.
= 24.
Astragalus bisulcatus var. major
The concept of var. major is here expanded to include the so-called basin variants of R. C. Barneby (1964), which occur from southern Wyoming through western Colorado and eastern and southern Utah. These are a diverse lot of pale-flowered populations, each of which varies toward smaller flowers and fruits than are present in var. bisulcatus.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
