Lianes with slender main stems up to 3 m. or more tall; branchlets finely grooved, pilose when young. Lvs 3-foliolate on slender pilose-pubescent petioles c. 3 cm. long. Lflts pubescent-pilose, becoming glab. on petiolules c. 1 cm. long; ovate, us. cordate at base, submembr., entire or crenately toothed or lobed, lobes often apiculate; 1·5-4 × 1-2 cm. Infl. in axillary rather few-fld panicles up to 8 cm. long; peduncles slender, pubescent-pilose, as are the very slender to filiform pedicels c. 2-3 cm. long. Bracts linear-oblong, ± connate at base, pilose. Fls slightly fragrant. ♂ 1-2-(2.5) cm. diam.; sepals 5-8, narrow-oblong to elliptic-oblong, yellowish, c. 1-1·5 cm. long, subacute, ± pubescent. Stamens ∞, with filaments up to 1 cm. long; anthers c. 1-1·5 mm. long, ovate-oblong to elliptic; connective produced into minute blunt apiculus. ♀ with smaller sepals; stamens us. abortive; achenes 1-2 mm. long, pilose, becoming glab.; styles c. 1-2 cm. long, white-plumose.

2n = 16

Evergreen woody climber. Lvs with fulvous hairs especially beneath, 3-foliolate, 3-8-(16) × 2-7-(16) cm; leaflets thin, ovate, acute to obtuse; margins entire to serrate, sometimes deeply lobed to dissected; petiole pilose, 2-5-(8) cm long. Fls unisexual, in axillary dichasial cymes. Bracts paired, united, inserted about middle of peduncle, with fulvous hairs. ♂ fls: sepals (5)-6-(8), imbricate, yellowish, glabrous above, hairy beneath, narrow-oblong to elliptic-oblong, 9-12-(22) × 2-5 mm; anthers 0.7-1 mm long; filaments glabrous. ♀ fls: sepals 5-8, imbricate, yellowish, glabrous above, hairy beneath, elliptic-ovate, 8-13-(15) × 2-3-(6) mm; staminodes few. Achenes hairy, (2)-3-4 mm long. Style 1.5-2.5-(3) cm long at fruiting.