Flora of North America species comparison

ascending, branched from slender, rhizomatous crown.

palmate;

stipules ovate or lanceolate, 0.5–2 cm, margins entire proximally, 1–3-toothed distally, apex acuminate or acute;

petiole 1.5–10 cm;

petiolules to 1 mm;

leaflets 3, blades obovate or elliptic, 0.5–4.2 × 0.3–2.5 cm, base cuneate, veins fine or slightly thickened, margins serrulate, apex acute, rounded, or retuse, apiculate, surfaces appressed-pubescent.

terminal, 6–30-flowered, globose, 2.3–3.1 × 2–3 cm, rachis prolonged beyond flowers;

involucres absent.

bent proximal to flowers, inflorescence appearing inverted, 2.5–12 cm.

reflexed in fruit, 1.5–2 mm;

bracteoles minute, scalelike, membranous, to 0.3 mm.

13–17 mm, sweetly fragrant;

calyx campanulate, 4.5–5 mm, appressed-pubescent, veins 5, tube 2 mm, lobes subequal, linear, orifice open;

corolla white, sometimes with purplish or buff-pink veins, 12–15 mm, banner elliptic, 12–15 × 4 mm, longer than wing and keel petals, apex tapered, sometimes retuse.

oblong to subglobose, 5 mm.

1 or 2, dark brown, ± globose, 1.2 mm, smooth.

= 16, 32.