Stems robust, angular-striate, glabrous and punctate. Petiole 1.5-4(-6.5) cm; leaf blade ovate, narrowly ovate, or ovate-oblong, 7-12 × 4.5-9 cm, leathery, unlobed or shortly to deeply 2-or 3-lobed, both surfaces glabrous, base rounded or truncate, margin usually entire or rarely distantly denticulate, apex acuminate. Male raceme 8-20-flowered; peduncle 7-15 cm, striate, flowering at apex; bracts ovate, shortly stipitate, margin entire or more usually with a few teeth; calyx tube dilated at apex, 1.8-4 × ca. 1 cm, shortly tomentose; segments linear-lanceolate, 20-30 × 1-1.5 mm, entire. Female flowers solitary; ovary oblong, 1-2 × ca. 0.8 cm. Fruiting peduncle 4-5 cm; fruit oblong, 12-18 × 5-10 cm, glabrous. Seeds brown, oblong-obovate, 10-23 × 5-20 mm, base truncate, apex obtuse. Fl. Apr-May, fr. Jul-Aug. 2n = 22.
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