Herbs, annual, 1–3 dm, spreading-pubescent. Cotyle­dons deciduous, petiolate. Stems ascending, tufted, or erect, branched or unbranched. Leaves cauline; petiole 2–7 cm, spreading-pubescent; leaflets 5–9, blades 10–30 × 1.5–8 mm, surfaces pubescent. Peduncles erect, 2–8 cm; bracts persistent, straight, 2.5–4 mm. Racemes 1–18 cm; flowers spirally arranged, solitary axillary flowers also sometimes present. Pedicels 0.7–2 mm. Flowers 5–12 mm; calyx 3–5 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft; corolla usually pink to purple, rarely white, banner spot white or yellowish, keel usually glabrous, rarely with few, minute cilia on lower margins. Legumes 1–1.5 cm, pubescent. Seeds 3–5. 2n = 48.

Phenology: Flowering spring.
Habitat: Open or disturbed areas, often following burns.
Elevation: 0–1600 m.

Distribution

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Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico (Baja California, Baja California Sur, Sonora).

Discussion

In Texas, Lupinus concinnus is known from the trans-Pecos region; in California it is more common in the central and southern areas.

Lupinus concinnus is a highly variable, predominantly self-pollinated complex and the named varieties cannot be consistently segregated. Desert plants with linear, coarsely hairy leaflets and few, minute cilia on lower keel margins (at times recognized as var. desertorum) may be confused with L. sparsiflorus.

Selected References

None.

Lower Taxa

None.