Shrubs or small trees, 2-5 m tall. All parts densely stellate pubescent and mixed with simple, glandular, yellowish or purplish hairs. Leaves with 3-10 cm long petiole; blade 5-15 cm long, usually broader than long, shallowly cordate-truncate at base, coarsely serrate obscurely-distinctly 3-7 lobed; lobes acute; stipules small, linear lanceolate. Flowers axillary, solitary, large, single or double; pedicel longer than petiole, articulate near the top; epicalyx segments 8-12, free, 0.7-2 cm long, c. 2 mm broad, linear to linear-lanceolate. Calyx free below or to the middle, 2.5-3 cm long, ± 1 cm broad, in fruit up to 4.5 cm; lobes ovate, acuminate. Corolla 5-8 cm across, white to pink, changing in colour to more or less red by late evening, but not so in single flowers; petals 4-6 cm long and broad, obovate, pubescent outside, claw with ciliate margin. Staminal column 2-2.5 cm long, subglobose, grooved or notched in the centre, lanate, inner margin of the valves villous, hairs c. 4 mm long. Seeds numerous, 2-2.5 mm long, reniform, dark brown, dorsal and lateral sides with spreading, simple to 6 branched, up to 2 mm long hairs.