Herbs, perennial, to 3(–3.5) m, herbage glabrous throughout. Stems glaucous. Leaves: stipules caducous, linear-subulate, 1–3 mm; petiole 1/3 to equaling blade; blade orbiculate to transversely elliptic, deeply palmately 3–5-lobed, 10–19 × 13–25 cm, base cordate, segments linear-lanceolate, margins remotely, unevenly serrate, apices acuminate, surfaces glabrous, nectary absent. Inflorescences solitary flowers in axils of distal leaves. Pedicels jointed distally, 3–14 cm, 1/3–1 3/4 petioles; involucellar bractlets 9–15, linear-subulate, 2.5–4 cm, not ciliate. Flowers showy, horizontal or ascending; calyx divided 3/4 length, rotate, 3.5–6 cm, larger in and longer than fruit, lobes narrowly triangular, apices acute to acuminate, nectaries absent; corolla rotate, petals not overlapping, bright red, narrowly spatulate-obovate, (6–)7.5–10 × 2.5–5.5 cm, minutely hairy abaxially where exposed in bud; staminal column straight, exserted, red, pink to white basally, 6.5–7 cm, bearing filaments in distal 1/3, free portion of filaments not secund, 4–8 mm; pollen dull yellow to dull red; styles red, 5–9 mm; stigmas red. Capsules brown, ovoid to globose, 2.8–3.5 cm, apex acute, apiculate, glabrous. Seeds brown, reniform-globose, 2.5–3.8 mm, hairy, hairs often in lines, brownish to reddish. 2n = 38.
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