Herbs or subshrubs. Stems erect, 30–100 cm, strigose. Leaves: petiole 7–20 mm; leaflets 11–23, blades oblong to elliptic-oblanceolate, (15–)20–40 × 5–7(–9) mm, length 3–6.5 times width, apex obtuse, rounded to truncate, or retuse, abaxial surface strigulose, adaxial glabrate. Racemes loose, 4–8(–10)-flowered, 5–8(–15) cm; floral bracts caducous, setaceous. Flowers: corolla white, darkening reddish, 13–16 mm; stamens weakly diadelphous; style bearded. Legumes 40–65 × 5–6 mm, glabrous.

Phenology: Flowering Jun–Aug(–Sep).
Habitat: Pine, pine-oak, oak, oak-Agave-Dasylirion communities, open slopes, canyons.
Elevation: 1300–1600 m.

Distribution

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Ariz., Mexico (Chihuahua, Durango, Sonora).

Discussion

Variety leiocarpa is restricted to Pima and Santa Cruz counties in southeastern Arizona.

Selected References

None.

Lower Taxa

None.