Flora of North America species comparison

erect or decumbent, branched.

decumbent, 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 broadly ovate, 1.3–1.7 cm, margins entire or faintly denticulate, apex acuminate;

petiole 7–17 cm (distalmost 6–8 cm);

petiolules 1–1.5 mm;

leaflets 3, blades ovate or orbiculate, 0.8–3.5 × 0.5–1.9 cm, base cuneate, veins fine, margins dentate to denticulate, apex rounded or obcordate, 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.

terminal, 20–50-flowered, globose becoming subglobose or hemispheric, 1.2–2.5 × 1.8–2.7 cm;

involucres a narrow rim.

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

2.2–2.5 cm.

reflexed, to 0.3 mm;

bracteoles absent.

reflexed in fruit, 5–7 mm;

bracteoles broadly ovate, membranous, to 0.5 mm, truncate.

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.

9–11 mm;

calyx campanulate, 3–5 mm, sparsely pubescent or glabrous, veins 10, tube 1–2 mm, lobes equal, narrowly triangular to subulate, 2–3.7 mm, orifice open;

corolla white, 9–10 mm, banner ovate-oblong, 9–10 × 6–8 mm, apex rounded or retuse.

ovoid, 2–3.5 mm.

oblong, 3–4 mm.

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

2–4, yellow to brown, purple-mottled, globose, 1.2–1.5 mm, slightly rugose.