Erect, up to 120 cm tall annual herbs. Stem hispid, usually strigose, simple or 2-rayed, retrorsely hairy. Leaves ovate-orbicular, cordate, serrate, 3-7-angled or lobed, sparsely pubescent; stipules lanceolate to ovate, 5-8 mm long, 4-6 mm broad; petiole 5-15 cm long. Flowers axillary solitary; pedicel usually longer than petiole, jointed near the top. Epicalyx segments slightly shorter than calyx. Calyx 1-1.5 cm long, fused to the middle, stellate pubescent; lobes c. 5 mm broad. Corolla 5-7 cm across, pink; petals 3-5 cm long, 3-4 cm broad, obovate, hairy at base. Staminal tube glabrous. Mericarps 10-18, glabrous, transversely ridged, covered by the expanded disc of carpophore. Seeds dark brown.