Astragalus miser var. hylophilus
woodlands weedy milkvetch, woody milkvetch
strigulose-pilosulous, hairs basifixed.
1–15 cm.
(3–)4.5–19 cm;
leaflets (9 or)11–21, blades narrowly to broadly elliptic, lanceolate, or lanceolate-oblong, (3–)5–26 mm, apex acute, obtuse, obtuse and apiculate, or, rarely, retuse, surfaces glabrous or sparsely pubescent.
(3–)6–16-flowered;
axis (1–)1.5–7(–7.5) cm in fruit.
calyx (3.8–)4–5.6 mm, tube 2.6–3.5 mm, lobes (0.9–)1–2.3 mm;
corolla whitish, sometimes purple-veined;
banner (5.2–)6.5–13 mm;
keel (7.1–)8–10(–11.4) mm.
linear, linear-ellipsoid, or -oblanceoloid, (15–)18–25 × 2.5–4 mm, usually glabrous, rarely with few, scattered hairs.
(6 or)7–11.
Astragalus miser var. hylophilus
Variety hylophilus occurs in the Rocky Mountains of western Wyoming and western Montana (and immediately adjoining Idaho), and the Black Hills of South Dakota.
Variety hylophilus is sympatric, in part, with vars. crispatus, miser, and tenuifolius. Its distinction may be preserved by ecological isolation; of the four varieties it is the most mesic, whereas the others are more xerophytic (D. Isely 1998).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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