Liana, the branches appressed ferruginous-pubescent, becoming eventually glabrous. Leaves opposite, coriaceous, lanceolate to ovate-lanceolate or oblong-lanceolate, acute to acuminate at apex, obtuse to acute at base, 5-13 cm long, 2-5.5 cm wide, glabrous and shiny above, glabrous or sometimes minutely ap-pressed-pubescent below, minutely and obscurely glandular, usually also with 1 or 2 pairs of plate-shaped glands along the midrib near the base; primary lateral veins 6-9 pairs; petioles 5-10 mm long, eglandular, appressed-pubescent, gla-brous in age; stipules interpetiolar, deciduous. Inflorescence terminal, cymose-paniculate, equalling the uppermost leaves, the axis and branches angular, ap-pressed, ferruginous-pubescent. Flowers 1.8-2 cm diam., often 4-umbellate, bracts ovate, obtuse at apex, ca. 1.5 mm long; peduncle thickened, 3-5 mm long, densely appressed-pubescent; pedicels 2-4 mm long; bracteoles paired, opposite, clasping, ovate, subacute, ca. 1 mm long; sepals 2-2.5 mm long, rounded at the apex, glabrous or subglabrous, densely ciliate; calyx glands 8, oblong, ca. 3 mm long; petals yellow, glabrous, the limb suborbicular or ovate-orbicular, 5.5-8 mm long, emarginate at base, the margin denticulate, the claw thick, 1.5-2.5 mm long; stamens somewhat unequal, united at the base into a tube, villous outside at the base, 1.5-2 mm long; anthers oblong-ellipsoid, ca. 1.5 mm long, the connective glabrous, thickened dorsally; ovary hirsute; style glabrous, broadly flattened sub-apically, recurved at apex. Samara with vestigial wings, ovate, rugose, drying 6-11 mm long, sparsely to densely subappressed pubescent, the lateral wings reduced, 2-8 mm long, deltoid and rounded at apex, the dorsal wing about equal to lateral wings but forming a sharp crest on the fruit body; inferior wings lacking altogether, the body ca. 8 mm diam.
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