Astragalus vallaris
Plants coarse, 8–30 cm, glabrous or sparsely strigose; from superficial caudex. Stems many, decumbent, glabrous or sparsely strigose. Leaves 3–7 cm; stipules 2.5–5 mm, membranous or membranous-margined; leaflets 13–25(–29), blades oblanceolate or obovate-cuneate, 6–16 mm, apex retuse or apiculate, surfaces glabrous (except midrib sparsely strigose) abaxially, glabrous adaxially. Peduncles reclined in fruit, 2–6 cm. Racemes 5–7-flowered, flowers ascending; axis 1.5–2 cm in fruit; bracts 2–4 mm; bracteoles 2. Pedicels 1.5–5 mm. Flowers 16–23 mm; calyx short-cylindric, 9.5–11 mm, strigulose, tube 5.5–6.5 mm, lobes linear-subulate, 3.5–4.5 mm; corolla whitish; keel 12–13 mm. Legumes ascending (humistrate), stramineous, slightly incurved, obliquely oblong-ovoid, obcompressed, 20–40 × (9–)11–19 mm, bilocular, fleshy becoming woody, glabrous; septum 3–4 mm wide; stipe 5–20 mm. Seeds 26–28.
Phenology: Flowering late Apr–Jun.
Habitat: Sagebrush and bunchgrass communities.
Elevation: 700–1000 m.
Distribution
Idaho, Oreg.
Discussion
Astragalus vallaris occurs in the Snake River Canyon and its tributaries in northeastern Oregon and adjacent Idaho.
Selected References
None.