Flora of North America species comparison

erect, branched.

decumbent to ascending or erect, slightly branched.

palmate;

stipules lanceolate or ovate, 1–2 cm, margins dentate or lacerate, apex acuminate;

petiole 1–8 cm;

petiolules 0.5 mm;

leaflets 3, blades linear, lanceolate, or elliptic, 1–5 × 0.2–1.5 cm, base cuneate, veins fine, margins serrate, apex acute, blunt, or retuse, surfaces glabrous.

palmate;

stipules whitish with prominent green veins, ovate, 0.3–0.5 cm, margins lacerate, apex acute to acuminate;

petiole 1–2.4 cm;

petiolules to 0.5 mm;

leaflets 3, blades obovate to elliptic, 0.6–1.5 × 0.3–0.8 cm, base cuneate, veins ± thickened distally, margins denticulate, sometimes entire proximally, apex rounded, acute, or retuse, surfaces glabrous.

axillary or terminal, 10–50-flowered, globose or ovoid, 1–3.5 × 1–3 cm;

involucres flattened or bowl-shaped, 3–9 mm, when folded, not hiding flowers except proximally, incised 1/4–1/3 their length.

terminal or axillary, 15–20-flowered (early inflorescences hidden in stipules, subsessile, 2–5-flowered, flowers cleistogamous), subglobose, 0.5–0.8 × 0.6–0.8 cm;

involucres flattened or shallowly bowl-shaped, 6–8 mm, when folded, nearly hiding calyces, glabrous or sparsely hairy, lobes 4 or 5, ± parallel-sided, 3 or 4-toothed.

2–15 cm.

1–3.5 cm.

erect, 0.5 mm;

bracteoles absent.

straight, to 0.5 mm;

bracteoles absent.

12–20 mm;

calyx tubular-campanulate, slit between adaxial lobes, 6–9 mm, glabrous, veins 10–15, tube 3–7 mm, lobes unequal, triangular or subulate, usually 3-fid or shouldered below apex, orifice open;

corolla usually white with purple spot, sometimes lavender or pink or all white, 10–18 mm, banner narrowly oblong, 12–20 × 3–4 mm, apex obtuse or retuse.

7–8 mm;

calyx tubular, 4–5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes subequal, triangular, margins conspicuously 2 or 3-toothed, apex aristate, orifice open;

corolla pale pink or white, 6–7 mm, banner oblong, 5–7 × 1 mm, apex emarginate or erose.

ellipsoid, 3 mm.

ovoid, 2.5 mm.

1 or 2, yellow, mottled, globose-ellipsoid, 1.5–2.5 mm, smooth.

1, dark brown, slightly mottled, ovoid, 2 mm, smooth.

= 16.