Deciduous woody climber; stem terete, weakly ribbed. Lvs sparsely hairy, green, 3-foliolate, (3)-6-10-(12) × (2)-4-8 cm; leaflets thin, lanceolate, cuneate at base, acuminate; margin coarsely serrate; petiole (2)-4-8-(10) cm long, with sparse silky hairs. Fls erect, ☿, solitary or 2-3 clustered in lf axils. Bracts ovate to triangular, clustered at base of peduncle. Sepals 4, valvate, white to pink, glabrous above, hairy beneath, elliptic-oblong, obtuse, 29-32-(37) × 13-18-(22) mm. Anthers 2.5-3.5 mm long; filaments glabrous, linear. Achenes compressed, glabrous, 4-5 mm long. Styles 4-5 cm long at fruiting.