Scandent lianas; branchlets terete, striate, yellow-brown pubescent, glabrate. Petiole 2.5-7 cm, glabrous; leaf blade ovate or elliptic-ovate to subcordate, 11-25 × 8-15 cm, thinly leathery, abaxially green or ferruginous-red, adaxially olivaceous-green, surfaces glabrous, base rounded or subcordate, apex acute-acuminate; lateral veins 4 or 5 pairs, anastomosing near margin. Racemose panicles axillary, usually 2 inflorescences per axil, 15-25 cm, ferruginous pubescent; pedicels ca. 7 mm, articulate proximally, glabrous; bracteoles 2. Sepals oblong, ca. 1.5 mm, pubescent. Petals yellow-white, oblong, 4-6 mm, glabrous or very sparsely puberulent. Stamens ca. 1/2 as long as petal length; anthers oblong. Ovary glabrous, ca. 1 mm; style ca. 2.5 mm. Samara suborbicular, 3.5-4.5 × 3-3.8 cm, membranous, apex 2-lobed, abaxial wing 15-18 × ca. 3 mm; fruit stalk ca. 1.5 cm. Seed cylindric. Persistent disk 3-lobed, ca. 1 mm; carpel stalk triangular, ca. 4 mm. Fl. Feb-Apr, fr. Apr-May.
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