Acmispon grandiflorus

Herbs, perennial, cespitose, sometimes robust, grayish or green, 1–4(–15) dm, not fleshy, ± densely puberulent or strigillose; rhizomatous, woody based. Stems 1–5+, decumbent to erect, branched, herbaceous, often striate, leafy. Leaves irregularly pinnate; stipules glandlike, conic; petiolate or sessile; rachis 2–3.5(–5.5) mm, not flattened; leaflets 7–9(–12), blades usually elliptic to obovate, sometimes ovate, apex acute to obtuse, sur­faces sparsely to densely puberulent or villosulous to strigillose. Peduncles ascending or spreading, 10–80 mm, longer than leaves; bract 1(–3)-foliolate, dis­tal. Inflorescences 3–9(–11)-flowered. Flowers 12–25 mm; calyx (4.5–)5.5–10 mm, tube villosulous, lobes subulate; corolla greenish white, white or yellow, fading to rose or reddish, claws shorter than calyx tube, banner ascending 45–90°, wings longer than banner and keel; style nearly straight or basally curved, glabrous. Legumes persistent, exserted, brown, linear-oblong, straight, turgid, sometimes slightly constricted, incompletely septate, 25–42(–70) × 2–3 mm, leathery, apex short hook-beaked, dehiscent, smooth, margins smooth, thickened, glabrate. Seeds 5–9, olive to reddish brown, mottled, broadly ovoid, smooth.

Distribution

California, nw Mexico.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Lower Taxa

Acmispon grandiflorus var. grandiflorus, Acmispon grandiflorus var. macranthus

Key

1	Herbs densely puberulent or villosulous, usually grayish; ovules 22–30.	Acmispon grandiflorus var. grandiflorus
1	Herbs strigillose or puberulent, green; ovules ca. 45.	Acmispon grandiflorus var. macranthus