Stems diffuse, weakly ascending, or prostrate, (1.5–)4–27 cm. Leaves 1–3.5 cm; leaflets (7 or)9–15, blades 2–8 mm. Racemes 7–20-flowered; axis 0.3–1.2 cm. Flowers (3.4–)4.3–5.4 mm; calyx tube 1.7–2.3 mm, lobes subulate or subulate-setaceous, (1.3–)1.6–2.4 mm, hairs mostly white, some­times also black; corolla keel abruptly incurved, (3.4–)3.8–4.5 mm, apex usually bluntly deltate, sometimes obscurely beaklike. Legumes 2.3–4 × 1.6–2.5 mm, deeply sulcate, strongly wrinkled transversely or diag­onally, strigulose-hirsutulous. 2n = 26.

Phenology: Flowering Feb–May.
Habitat: Foothills of desert mountains, on arid sandy soils, with Larrea.
Elevation: 30–1100(–1300) m.

Distribution

• Generated Map
• Legacy Map

Loading map...

Ariz., Calif., Nev., Mexico (Baja California).

Discussion

Variety dispermus occurs from the western edge of the California deserts across southern Nevada to central and southern Arizona.

Selected References

None.

Lower Taxa

None.