Plants stout, erect or diffuse and spreading, herbage usually pubescent. Leaflets (13–)21–35, 5–27 mm. Racemes 35–80-flowered; axis (4–)5.5–25 cm in fruit; bracts (2.5–)3–5 mm. Flowers 8–11 mm; calyx usually pallid, tube 3.1–4 mm, lobes 1–2.7 mm; corolla white or whitish to ochroleucous; banner longer than keel. Legumes ellipsoid or oblong-ellipsoid, (5–)6.5–9.5 × 2–4 mm, transversely rugose-reticulate, strig­ulose; stipe 1.4–3 mm. Seeds 5–8. 2n = 24.

Phenology: Flowering May–Jul.
Habitat: Sagebrush-mountain brush, pinyon-juniper, ponderosa pine, and spruce-fir com­munities, on fine-textured, often saline, seleniferous substrates.
Elevation: 1900–3300 m.

Distribution

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Ariz., Colo., N.Mex., Utah, Wyo.

Discussion

Variety haydenianus from the Wasatch Plateau in Utah has been confused by some workers with the similarly pale-flowered var. major, but the flowers are consistently smaller, much more numerous, and the fruits smaller than in var. major.

Selected References

None.

Lower Taxa

None.