Tendrilled lianas; stems 6-costate, usually rufous-villous; wood simple. Leaves biternate; petiole 2-5 cm long; petiole and rachis without wings; leaflets elliptic or elliptic-lanceolate to oblong or ovate-lanceolate, acuminate at the apex, ob-tuse or attenuate at the base, 1.5-11 cm long, 1-5 cm wide, entire or with small teeth above the middle, subcoriaceous, villous to rufous-tomentose beneath, glabrate to sparsely pubescent on the upper surface, densely pubescent on the major veins, the midrib and major lateral veins sharply raised above, the surface shiny, viscidulous; stipules ovate to triangular, minute. Thyrses solitary in the axils of the leaves, on tendrils, or in terminal panicles less than 12 cm long, rufous-tomentose; bracteoles acute; pedicels 2-3 mm long. Flowers white, 3-4 mm long; sepals ovate, densely rufous-tomentose, 2-5 mm long; petals oblong-obovate, gla-brous without, sparsely glandular within, 2.5-3.5(-4.5) mm long, the scale 2-3 mm long, marginally ciliate, the crest orange, emarginate to prominently bifid with the projections usually acute, the deflexed appendage densely villous throughout; stamens about as long as the scales of the petals, the filaments villous;. ovary 3-lobed, tomentose. Fruits ovate-cordate, 2-2.5 cm long, to 2 cm wide, the cells to ca. 4 mm wide, densely whitish-puberulent, viscidulous, the wings shiny, puberulent at least along the inner edge, constricted at the lower edge or below the seed-bearing part.
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