Erect annual herbs, 1-2.5 m tall. Stem rough stellate hairy, glabrescent. Leaves long petioled, large, round or ovate, at base cordate, at apex rounded, entire to 5-7 lobed, upper 3-lobed, crenate to dentate, scabrous and stellate pubescent on both sides. Flowers axillary, solitary or 2-3 in fascicles, spike like because of short pedicel in terminal branches, pedicel enlarged in fruit. Epicalyx segments 6-7, 1.5 cm long or more, fused below the middle, lanceolate to ovate. Calyx up to 1.5 times longer than epicalyx, both epicalyx and calyx stellate pubescent, scabrous. Corolla 5-7 cm across, of various colours; petals 4-7 cm long. Fruit depressed, globose; pubescent, enclosed by calyx, ± 2 cm across; mericarps 2C-40, channeled and winged dorsally, 5-7 mm across, back 1.5 mm broad.
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