Branchlets terete, glabrous, glaucous; tendrils unbranched. Leaves simple; stipules caducous; petiole 4.5-10 cm, glabrous; leaf blade oval, 11-13 × 7-11 cm, glabrous, basal veins 6 or 7, lateral veins 5 or 6 pairs, veinlets slightly raised abaxially, base deeply cordate, notch narrow to acute, two sides close together, margin irregularly 31-39-toothed on each side, apex mucronulate. Panicle leaf-opposed, ca. 12 cm; peduncle subglabrate. Pedicel 2-2.5 mm, glabrous. Buds obovoid, 2-2.5 mm. Calyx glabrous, margin undulate. Petals oblong, 1.5-2 mm. Filaments filiform, slightly flat, 1-1.5 mm; anthers yellow, oblong, ca. 0.8 mm. Ovary conical; style short.
Home