Woody climbers or suberect shrubs, deciduous. Branchlets yellowish green; branches brown, glabrous, striate. Petiole 0.5-1 cm; leaf blade abaxially pale green, adaxially green, oblong-lanceolate, oblong-elliptic, or ovate, 5-11 × 1.5-4 cm, papery, both surfaces glabrous, lateral veins 4 or 5 pairs, slender, ascending, curved, base cuneate or rounded, apex acuminate or acute. Cymes 2(or 3)-flowered, 1.5-1.8 cm. Sepals 5, slightly unequal, subobovate to oblong, (1-)1.5-3 × 0.5-1.5 mm, largest one distinctly emarginate at apex, others rounded. Petals 5, suborbicular or obovate, (3.5-)5-6 × ca. 3.5 mm. Stamens 5, equal; filaments ca. 2 mm, slender; anthers ca. 0.8 mm, introrse. Disk swollen, higher than broad, base broadest, with 2 or 3 obscure projecting veins, each vein with a tiny gland. Ovary ovoid, glabrous. Schizocarp suborbicular, 7-9 mm in diam., with persistent sepals at base. Fl. Apr, fr. Jun-Jul.
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