Perennial, extensive, climbing shrub; stem and branches sulcate and tomentose; leaves opposite, exstipulate with twinning petioles, simple or 1-3 lobed, lobes ovate to cordate, 3-nerved, margins entire, cuneate or cordate at base, mucronate at apex, puberulous on both surfaces, densely tomentose when young; flowers 1-7 in axillary, corymbose panicles; bracts foliaceous; flowers 4-5 cm across, actinomorphic, white, fragrant; sepals usually 4 sometimes 6, valvate, membranous, oblong, spreading from the base, silky outside, deciduous, often petaloid; petals absent; stamens many, free, filaments glabrous, ligulate at base, anthers linear, narrow, connective not produced inner shorter with longer anthers; carpels many, apocarpous, each with one, pendulous ovule; styles persistent, very long, feathery; fruits compressed, villous, achenes about 2 cm across with long, persistent, feathery tails.