Flora of North America species comparison

erect or 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.

blades of basal leaves obovate, of median leaves broadly lanceolate, apex rounded to retuse, surfaces sparsely hairy or glabrous adaxially.

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.

significantly overtopping distal leaves, 2.5 cm diam.

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

reflexed, to 0.3 mm;

bracteoles absent.

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.

calyx lobes usually purple, contorted, abaxial lobes longer, lateral lobes 1–1.5 times tube;

corolla white, cream, or purple;

ovules 3 or 4.

ovoid, 2–3.5 mm.

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

= 16.