Plants often multistemmed, from fibrous-thickened root crown, 1–2 m, herbage variously hispid or scabrid, hairs stellate or simple. Stems sparingly to freely branched. Leaves: stipules linear-subulate, 2.5–6 mm; petiole of lower leaves 1/4–2/3 times blade; blade narrowly ovate to transversely ovate, sometimes palmately, hastately, or sagittately 3(–5)-lobed, 3–8 × 1.5–6.5 cm, margins irregularly serrate to crenate, apex broadly acute to acuminate. Inflorescences solitary flowers in axils of distal leaves or leafy, open panicles. Pedicels exceeding petioles, sometimes blades; involucellar bractlets 6–7, linear to subulate, 2–3 mm. Flowers: calyx divided for 2/3–4/5+ its length, campanulate to rotate, 3.2–6 mm; corolla rotate, petals usually white, usually with yellow base, sometimes with pink blush, sometimes drying yellowish, asymmetrically ovate to orbiculate, 5–14 × 5–10 mm; staminal column straight or declinate, yellow, 4–10 mm, bearing filaments mostly in distal 1/2–2/3; filaments 1.5 mm; anthers subsessile, yellow; pollen yellow; styles white or pink, 1.5–2 mm; stigmas pink. Capsules olivaceous to brown, 8–11 mm diam., valve margins angulate or subangulate in outline, variously short-hairy, with prominent curved or hooked, simple hairs on sutures. Seeds brown, 2.5–2.8 mm, minutely hairy. 2n = 38 (Mexico, as K. pentasperma).
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