Perennials; glabrous or sparsely pubescent. Rhizomes cylindrical, slender, to 2 mm diam. Stems erect, unbranched, (1.5–)2.5–8.5(–10) dm, sparsely to densely hirsute at base. Rhizomal leaves 3 (or 5)-foliolate, (4–)7–20(–22) cm, leaflets petiolulate or subsessile; petiole (2–)4–12(–14) cm; lateral leaflets subsessile, blade similar to terminal, larger or smaller in size; terminal leaflet petiolulate [(0.3–)0.5–1.5 cm], blade ovate to broadly lanceolate, 1.5–7(–9) cm, base usually cuneate, rarely subreniform or obtuse, margins 3–5(–7)-lobed or -toothed, surfaces puberulent. Cauline leaves (3 or) 4–8, 3 (or 5)-foliolate, petiolate, leaflets petiolulate or sessile; petiole 1–4 cm, base not auriculate; lateral leaflets sessile, blade similar to terminal, smaller, margins usually dentate, rarely entire; terminal leaflet sessile or petiolulate, blade broadly ovate to narrowly lanceolate, 2–7 cm × 6–40 mm, margins minutely pubescent. Racemes ebracteate. Fruiting pedicels ascending to divaricate, (9–)12–25 mm. Flowers: sepals oblong, 2.5–4 × 1.3–2 mm, lateral pair saccate basally; petals usually white, rarely pinkish, obovate, 8–15 × 4–8 mm (clawed, apex rounded or emarginate); filaments: median pairs 3.5–6 mm, lateral pair 2–3.5 mm; anthers oblong, 0.8–1.2 mm. Fruits linear, 1.5–3.2 cm × 1.4–2 mm; ovules 10–16 per ovary; style (0.5–)1–4 mm. Seeds dark brown, oblong, 1.8–2.3 × 1–1.2 mm. 2n = 40.