Flora of North America species comparison

decumbent or erect, branched.

palmate;

stipules ovate-lanceolate, 0.5–1.1 cm, margins toothed or lacerate, apex acute-acuminate;

petiole 1–10 cm;

petiolules to 0.5 mm;

leaflets 3, blades oblanceolate or obovate, 1.5–2.5 × 0.4–0.7 cm, base cuneate, veins fine, thickened distally, margins ± serrate or entire, apex rounded or retuse, surfaces pubescent or glabrous.

axillary or terminal, 5–20-flowered, subglobose or globose, 0.6–1.5 × 1–1.5 cm;

involucres bowl-shaped, 5–15 mm, lobes 6–10, sharply setaceous-toothed, sinuses shallow.

5–10 cm.

straight, 0.2 mm;

bracteoles absent.

4–6 mm;

calyx campanulate, 5–9 mm, usually pubescent, rarely glabrous, veins 5, tube 2–3 mm, lobes ± equal, setaceous, often exceeding banner, orifice open;

corolla usually lavender to purple, usually with white tips, rarely wholly white, 5–8 mm, banner broadly oblong, proximally inflated in fruit, distally narrowed into twisted tip, 6–8 × 6–8 mm, apex broadly acute.

ovoid-ellipsoid, 2–3 mm.

1 or 2, brown, ellipsoid to subglobose, 1–1.5 mm, slightly roughened.

= 16.