Plants 3–35(–100) cm. Stems erect or ascending. Leaves 3–7(–25 cm); leaflets 5–13, blade linear, ovate, or wide-ovate, margins usually toothed or lobed, sometimes entire. Flowers cup-, bell-, or funnel-shaped; sepals narrowly lanceolate-ovate, lanceolate, or linear-lanceolate, 4–10 mm (glabrous or ciliate); petals white, yellow, or yellow with white tips (sometimes greenish yellow basally), cuneate, obovate, spatulate, or obovate-spatulate, 7–18 mm, apex usually emarginate, sometimes truncate or obcordate; filaments 2–7 mm; anthers usually cream or yellow, sometimes dark pink, orange-red, or nearly black, 0.8–1.5 mm; style 3–8 mm. Nutlets dark brown, black, or gray, 2–5 mm, smooth, ridged, or tuberculate (at least apically), tubercles or ridges brown, pinkish, gray, or whitish, lamellar, planar, conical, rounded, or blunt.