Stems 0.5–4 m, hirsute, hairs stipitate-glandular. Leaf blades reniform to orbiculate, angular or undulate to shallowly lobed, 5–8(–15) cm wide, base broadly cordate, margins entire or denticulate, surfaces hispid to hispidulous. Inflorescences: staminate flowers in simple or compound racemes 6–12 cm. Flowers: sepals narrowly triangular; petals triangular-ovate, 3–4 mm, apex acute to slightly obtuse, surfaces stipitate-glandular abaxially, punctate-glandular adaxially, corolla rotate, 6–8 mm diam.; anther thecae arcuate. Capsules <tapering to base>, 2.5–3 × 1.4–1.8 cm, surface and prickles hirsute, hairs stipitate-glandular, beak 10 mm, prickles 10–20 mm. Seeds without depression on surfaces. 2n = 24.
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