Flora of North America species comparison

erect or decumbent, branched.

prostrate to ascending, branched.

palmate;

stipules lanceolate or ovate, 1–5 cm, margins entire or denticulate, apex acuminate or acute;

petiole 1–15 cm;

petiolules 1 mm;

leaflets 3, blades linear, linear-elliptic, elliptic, lanceolate, lanceolate-oblong, or obovate, 1–5 × 0.4–1.2 cm, base cuneate, veins fine or ± thickened, margins denticulate or serrulate, apex acuminate or acute, surfaces appressed-pubescent abaxially, glabrous, densely villous, or sparsely or densely pilose adaxially.

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, 25–70-flowered, inverted or horizontal, ellipsoid or globose to subglobose, 2–3 × 1–3 cm, rachis prolonged beyond flowers;

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.

bent distally, proximal to flowers, 3–18 cm.

4–6 cm.

reflexed, to 0.3 mm;

bracteoles absent.

erect to slightly reflexed, 1–2 mm;

bracteoles ovate, 0.5 mm.

9–18 mm;

calyx campanulate, curved in fruit, 4–11 mm, villous, veins 10, tube 1.5–2.5 mm, lobes unequal, 2–3 times tube, subulate, often strongly curved and twisted, plumose, orifice open;

corolla white, cream, or purple, 8–16 mm, banner oblanceolate, 8–16 × 3–5 mm, apex rounded or retuse, recurved;

ovaries pubescent distally.

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.

ovoid, 2–3.5 mm.

short-stipitate, oblong, 3.5–5 mm.

(1 or)2–4, yellow-brown to brown, mitten-shaped or subglobose, 1.2–2 mm, smooth.

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

= 16.