Flora of North America species comparison

erect, fistulose, unbranched or branched distally.

usually erect or ascending, rarely prostrate, branched.

palmate;

stipules ovate, 1.5–4.5 cm, margins usually entire, sometimes lobed, apex acuminate;

petiole 0.5–20 cm;

petiolules 1–1.5 mm;

leaflets 3, blades ovate, elliptic, or rhombic, 3.5–9.5 × 2.3–5 cm, base cuneate, veins obscure, margins ± serrate, apex acute, rounded, or obtuse, surfaces glabrous.

palmate;

stipules triangular-lanceolate, 0.4–0.8 cm, margins entire, apex dark purple or reddish, sharply recurved, subulate;

petiole 0.5–10 cm;

petiolules 0.5 mm;

leaflets 3, blades obovate or obtriangular, 0.5–2.5 × 0.3–2.5 cm, base cuneate, veins fine, margins denticulate, apex rounded to emarginate, surfaces glabrous.

terminal or axillary, 20–70-flowered, globose or ellipsoid, 2.5–4 × 2–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally;

involucres absent.

axillary or terminal, 15–50-flowered, globose, 1–1.8 × 1–1.8 cm;

involucres a narrow rim, to 0.2 mm.

3–11 cm.

1.5–4 cm.

strongly reflexed in fruit, 1 mm;

bracteoles minute, blunt or acute, membranous.

reflexed in fruit, 3–6 mm;

bracteoles narrowly oblanceolate, 3–6.5 mm.

10–14 mm;

calyx campanulate, gibbous, 4–5.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes subequal, linear-lanceolate, orifice open;

corolla white, lemon yellow, or greenish yellow, 11–12 mm, banner elliptic-oblong, 11–12 × 4–5 mm, apex obtuse.

6.5–9 mm;

calyx oblong, 3–5 mm, glabrous or pubescent, veins 5–10, tube 1–2.5 mm, lobes ± equal or unequal, triangular-lanceolate, recurved in fruit, margins green or purple, apex acute to acuminate, orifice open;

corolla pink or white, 6–9 mm, banner obovate-oblong, 6–9 × 1–2 mm, apex acute to emarginate.

oblong or clavate, 4–5 mm.

linear-oblong, 3–4.5 mm.

1–3, reddish black or brown, angular, mitten-shaped, 2.5 mm, smooth or slightly roughened, dull.

1–5, yellow or pale or dark brown, oblong, 1 mm, smooth.

= 16.