Herbs, annual, cespitose, greenish, 0.4–0.9 dm, not fleshy, villous; taprooted. Stems 1–5+, decumbent to ascending, branched basally, herbaceous, leafy. Leaves irregularly pin­nate or palmate; stipules glandlike, barely visible; subsessile; rachis 4–6 mm, flat­tened; leaflets 4, 2 on one side and 2 terminal, blades lanceolate, sometimes asymmetric apex acute, surfaces vil­lous. Peduncles ± sessile; bract absent. Inflorescences 1-flowered. Flowers 5–8 mm; calyx 1.5–5 mm, tube villous, lobes subulate, acuminate; corolla bright pink­ish red, claws shorter than calyx tube, banner implicate-ascending, wings ± equaling keel; style curved or genic­ulate, glabrous. Legumes persistent, mostly included, erect, stramineous, straight, compressed, slightly con­stricted, not septate, broadly oblong, 8–9 × 2.5 mm, papery, apex obtuse, dehiscent, smooth, margins smooth, keeled, villous. Seeds 2–4, olive green to brownish, ± mottled, ± lenticular, semilustrous, smooth to rugose.

Phenology: Flowering spring.
Habitat: Open, oak woodlands, grasslands.
Elevation: 100–500 m.

Distribution

• Generated Map
• Legacy Map

Calif.

Discussion

Acmispon rubriflorus is known only from Colusa, Stanislaus, and Tehama counties.

Selected References

None.

Lower Taxa

None.