Flora of North America species comparison

erect, ascending, or prostrate, branched.

procumbent or erect, branched.

palmate;

stipules ovate to oblong, 0.6–1 cm, margins entire, apex acuminate to cuspidate;

petiole 0.5–6 cm;

petiolules to 0.5 mm;

leaflets 3, blades obovate, oblanceolate, or elliptic, 0.6–1.6 × 0.3–1.2 cm, base cuneate, veins obscure or slightly thickened, margins subentire to serrate, apex rounded, retuse, surfaces pubescent.

palmate;

stipules ovate, 0.3–0.5 cm, margins entire, apex acuminate-subulate;

petiole 1–6 cm;

petiolules to 0.5 mm;

leaflets 3, blades obovate or obcordate, 0.3–0.8 × 0.2–0.6 cm, base cuneate, veins prominent adaxially, margins finely toothed, apex truncate or retuse, surfaces glabrous or sparsely hairy.

terminal or subterminal, usually paired, sometimes one head slightly stalked, partially hidden by terminal leaves and stipules, 10–40-flowered, ovoid or subglobose, 0.8–2.5 × 0.5–2 cm;

involucres absent, involucrelike structure formed from terminal leaves and stipules.

axillary, 10–20-flowered, dense, globose, 0.5–0.8 × 0.5–0.8 cm;

involucres absent, stipules forming involucrelike structures, overtopping inflorescences.

0–0.2 cm.

essentially absent.

absent;

bracteoles broadly ovate to linear, 1–2 mm.

straight, 0.1 mm;

bracteoles triangular, membranous, 0.5–1.2 mm, apiculate.

5.5–7.5 mm;

calyx tubular, 4–5 mm, pubescent, veins 5–10, tube 1.5–2 mm, lobes subequal, subulate, orifice open;

corolla usually purple or pink, rarely white, 5–7 mm, banner obovate-oblong, 6–7 × 2–3 mm, apex rounded, slightly denticulate.

3–5 mm;

calyx tubular, 3–5 mm, slightly hairy or glabrous, veins 10, tube 2–3 mm, lobes subequal, lanceolate, curved in fruit, orifice open;

corolla white, 2.5–3.5 mm, banner obovate, 2.5–3.5 × 1 mm, apex acute.

oblong, 2.5–3 mm.

ovoid-ellipsoid, 3–5 mm.

1, yellow, mottled, ellipsoid, 1.6–2 mm, smooth.

2, yellow, lenticular or reniform, 0.8–1 mm, minutely papillate.

= 16.

= 16.