Flora of North America species comparison

erect, fistulose, unbranched or branched distally.

prostrate to ascending, 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 lanceolate-ovate, 0.7–1.3 cm, margins entire, apex acuminate;

petiole 1–8.5 cm;

petiolules 1–1.5 mm;

leaflets 3, blades oblanceolate or obovate, 0.5–2.9 × 0.4–1.3 cm, base cuneate, veins prominent, margins denticulate to spinulose, apex usually rounded or truncate, sometimes retuse, 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, 10–20-flowered, obconic, globose, or subglobose, 1.7–2.5 × 1.–1.5 cm;

involucres broadly campanulate, 6–8 mm, incised ± 3/4 their length, lobes 15–20, linear-lanceolate, entire, acuminate.

3–11 cm.

4–6 cm.

strongly reflexed in fruit, 1 mm;

bracteoles minute, blunt or acute, membranous.

erect to slightly reflexed, 1–2 mm;

bracteoles ovate, 0.5 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.

10–16 mm;

calyx campanulate, 6–10 mm, glabrous, veins 10, tube 2–2.3 mm, lobes ± equal, subulate, 3–5 mm, orifice open;

corolla white to pale purple, keel petals with dark purple-red tips, 11–13 mm, banner oblong, 11–13 × 4–5 mm, apex retuse.

oblong or clavate, 4–5 mm.

short-stipitate, oblong, 3.5–5 mm.

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

1 or 2, olive-brown, mottled purple, oblong, 1.5 mm, smooth, semiglossy.

= 16.