Astragalus tephrodes var. brachylobus
ashen milk vetch, prescott milkvetch
0–8 cm.
4–16 cm;
leaflets 11–27(–31), blades mostly flat, usually obovate-cuneate, oblanceolate, or rhombic-elliptic, rarely suborbiculate, (3–)4–17 mm, apex obtuse, acute, or emarginate.
10–25(–35)-flowered;
axis (1.5–)2–8(–11) cm in fruit.
(4–)5–15(–21) cm.
(14–)18–24 mm;
calyx 8.8–12.7(–14) mm, pilosulous to loosely strigulose, sometimes villous, tube 7.1–10 mm, lobes 1.7–2.8 mm;
corolla banner (14–)18–24 mm;
keel 14.7–20.1 mm.
oblong-ellipsoid to lanceoloid-ellipsoid or, sometimes, ovoid-acuminate, 17–30 × 6–10 mm, somewhat fleshy becoming stiffly leathery or subligneous, usually strigulose or pilosulous, sometimes glabrous.
24–35.
2.5–11 mm, surfaces villosulous, sparsely strigulose, or glabrate abaxially.
Astragalus tephrodes var. brachylobus
The range of var. brachylobus extends from the crest of the Mogollon Escarpment northward to the slopes of the Kaibab Plateau, westward to the Colorado River near Needles, California, and southeastward around the edge of the Gila Basin to west-central New Mexico.
The pubescent phases of var. brachylobus were aggregated into four groups, three somewhat geographically restricted (R. C. Barneby 1964). Variety brachylobus is difficult to distinguish from var. tephrodes in west-central New Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
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