Plants glabrous or herbage with a few scattered hairs. Stems 10–40 cm. Leaflets: adaxial blade surface glabrous, sparsely ciliate. Flowers 13.5–19.5 mm; calyx (8–)9–13.6 mm, tube (7.5–)8–11.9 mm, lobes 0.5–2.3 mm. Legumes gently incurved or, sometimes, hamate, 16–23 × 3–4 mm, glabrous; stipe 10–15 mm. Seeds 14–20.

Phenology: Flowering late Apr–early Jul.
Habitat: Dry rocky hillsides, rough prairies, gravelly sagebrush slopes and flats on basalt.
Elevation: 500–1200 m.

Distribution

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Oreg.

Discussion

Variety subglaber is known from the lower Deschutes and John Day valleys in Gilliam, Grant, Sherman, Wasco, and Wheeler counties.

Attention was drawn by R. C. Barneby (1964) to the succulent nature of the banner and the auricles of the wings and keel.

Selected References

None.

Lower Taxa

None.