Deciduous woody climber; stem terete, weakly ribbed. Lvs glabrous or with a few scattered very fine hairs especially beneath, green, 1-pinnate, 15-25 × 7-20 cm; leaflets subcoriaceous, ovate to lanceolate, abruptly cuneate to shallowly cordate at base, acute to apiculate; margin entire; petiole glabrous, 4-7 cm long. Fls erect, ☿, 3-10-(15) in axillary compound dichasial cymes. Bracts paired, free; lower bracts ovate to elliptic to spathulate, apiculate; upper bracts subulate, inserted near base of pedicel. Sepals 4, valvate, white, glabrous or glabrescent above, with dense hairs near margins beneath, oblong, obtuse, 15-20-(24) × 3-4 mm. Anthers 2-4 mm long; filaments glabrous, linear. Achenes compressed, hairy, 5-6 mm long; style c. 3 cm long at fruiting.