Dioecious or monoecious climber, with extensive roots. Stems striate, up to 10 m long and clothed in rough deflexed hairs. Lvs broadly ovate, not lobed or deeply 3-5-lobed; lobes acute to acuminate, serrate, ± glabrous to sparsely hairy above, ± glabrous to moderately hairy with yellow glandular hairs below. Petiole usually ± = lf blade. Stipules 2 per node and 2-fid or 4 per node and entire. Bracts of ♀ fls triangular, hairy, green, elongating and becoming yellowish at fruiting to form a cylindric-ovoid infructescence (the hop) with yellow glandular hairs especially at base of bracts. Calyx of ♂ fls ovate-triangular, green, hairy. Achene ovate-ellipsoid, covered by glandular calyx.