Plants dwarf, tuft- or humifusely mat-forming, shortly caulescent, 3–11 cm, densely gray-villous, hairs basifixed; from superficial caudex; taproot slender. Stems decumbent-spreading, gray-villous. Leaves 1–4 cm; stipules 1.5–3.5 mm, membranous; leaf­lets 5–15, blades obovate, 3.2–6.5 mm, apex obtuse, surfaces villous. Peduncles ascending, decumbent in fruit, (0.7–)1.1–2.4 cm. Racemes (2 or)3–7-flowered, flowers ascending; axis 0.1–0.5 cm in fruit; bracts 2 mm; bracteoles 0. Pedicels 0.6–1.2 mm. Flowers 9–11.2 mm; calyx campanulate, 5.5–6.5 mm, white-villosulous, tube 3.6–4.8 mm, lobes linear-subulate, 1.1–1.8 mm; corolla pink-purple; banner recurved through 40°; keel 8.5 mm. Legumes deciduous from within calyx, initially ascending (humi­strate), stramineous, falcately incurved, obliquely ellip­soid, dorsiventrally compressed, conspicuously 3-sided beaked, 9–12(–15) × 5–7 mm, unilocular, stiffly papery, sparsely villous. Seeds (12–)16–20.

Phenology: Flowering May–Jun.
Habitat: Sagebrush, rabbitbrush, and juniper communities, on white, tuffaceous outcrops.
Elevation: 1500–1700(–1800) m.

Distribution

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Idaho, Nev., Utah.

Discussion

Astragalus anserinus is restricted to near the junction of Idaho, Nevada, and Utah.

Selected References

None.

Lower Taxa

None.