Lianas; stems deeply 3-6-sulcate or 3-sulcate with the costa weakly sulcate, conspicuously long-hispid, the trichomes reddish brown, to 6 cm long; texture of the surface smooth; wood simple. Leaves pinnately 7-foliolate, 22-45 cm long, sparsely but conspicuously hirsute on all surfaces and margins, viscidulous; peti-oles without wings, 3-16 cm long, prominently sulcate above; both lower and up-per rachis broadly winged, the wings 6-10 mm wide; leaflets oblong-lanceolate to oblong-elliptic or oblong-oblanceolate, usually narrowly acuminate, sometimes acute at the apex, attenuate at the base on the terminal leaflet, inequilateral and acute to narrowly rounded on lateral leaflets at the base, 5-18 cm long, 1.5-6.7 cm wide, crenate mostly above the middle, the reticulate venation prominulous on both surfaces; stipules lanceolate-oblong, 14-20 mm long, several-nerved, glabrous except for the hispid margins. Inflorescences axillary, apparently soli-tary, short; rachis sparsely hispid; bracteoles narrowly deltoid, glabrous, thickened greatly at the base, especially medially; pedicels to 2.5 mm long, glabrous, ar-ticulate about midway. Flowers white; sepals rounded, glabrous; petals obovate, glabrous, glandular within, the anterior scales with crests emarginate, the deflexed appendage ciliate; disc glands 2, semicircular, glabrous; stamens with the fila-ments glabrous; ovary glandular. Fruit not known.
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