Young branchlets brown, slightly glossy, compressed above, subterete and lenticellate below, glabrous, older ones yellowish-brown, longitudinally lenticellate; internodes 1–1 3/4 in. long. Leaves opposite, ovate-oblong or lanceolate, obtuse or shortly acuminate to an obtuse apex, rounded or subcordate at the base, 2 1/2–4 in. long, 1–1 1/2 in. broad, coriaceous, glabrous, slightly glossy; lateral nerves 4–5 on each side, patulous, arcuate-ascending, anastomosing well within the margin; petiole 4–7 lin. long. Umbels axillary, fascicled, about 20-flowered; peduncle 1/2– 3/4 in. long; pedicels 2–2 1/2 lin. long; bract obliquely cupular, 1–1 1/8 lin. long, ciliate, dorsal margin 7/8 lin. long, umbonate on the lower half, ventral margin 3/8 lin. long, more or less toothed. Receptacle and calyx together campanulate, 1–1 1/8 lin. long. Calyx irregularly lobed, ciliate, 1/2 lin. long. Corolla 1 1/2 in. long, split unilaterally to within 6 1/2 lin. above the base, apical swelling of the bud not winged, basal swelling obovoid, pentagonal, 2 lin. long; tube glandular within; lobes elongate-spathulate, 8 1/2 lin. long from the point of insertion of the filaments, remaining united nearly to the apex. Filaments 7 lin. long, broadened towards the apex; anthers oblong, emarginate, 7/8 lin. long. Disc 1/4 lin. high, fleshy. Style glabrous, neck 1 lin. long; stigma cushion-shaped, 1/2– 5/8 lin. in diam., grooved on the upper surface.