Herbage loosely strigulose or villosulous, hairs subappressed, spreading-incurved, or incurved-ascending, often sinuous, 0.3–0.7 mm. Stems low, prostrate to weakly ascending, slender, 2–12(–17) cm. Leaves 1–4 cm; leaflets (5–)11–17, blades 2–10(–12) mm. Racemes 4–9(–11)-flowered; axis 0.5–2(–2.5) cm in fruit. Flowers: calyx 4.8–6 mm, tube 3.5–4.3 mm, lobes 1–1.7 mm; corolla whitish or cream, sometimes lilac-tinged; banner 9–12.8 mm. Legumes (15–)20–40(–55) × (8–)10–22(–26) mm, loosely and sparsely strigulose; stipe 2.5–5.5(–6) mm. Seeds 21–27.

Phenology: Flowering Jun–Aug.
Habitat: Ridges near timberline and lower into timberbelt, on igneous and metamorphic bedrock, especially abundant on serpentine bedrock.
Elevation: 1300–2800 m.

Distribution

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• Legacy Map

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Idaho, Oreg., Wash.

Discussion

Variety sonneanus is found in the Blue and Cascade mountains of Washington, southward through north­eastern and east-central Oregon to Steens Mountain in Harney County, and eastward to Valley County in west-central Idaho.

Selected References

None.

Lower Taxa

None.