Branchlets slender, glabrous, drying blackish, internodes 3/4–1 1/4 in. long. Leaves opposite, lanceolate, obtuse or rounded at the apex, obtuse at the base, 2 1/2–4 in. long, 1–1 1/2 in. broad, coriaceous, glossy, very finely wrinkled and dark brown in a dried state; lateral nerves indistinct; petiole 4–5 lin. long, narrowly winged. Umbels axillary, ternate, about 6-flowered; peduncle 2 lin. long; pedicels 3–3 1/2 lin. long; bract ovate from a saucer-shaped base, acute or narrowly truncate, minutely ciliolate, dorsal margin 3/4 lin. long, strongly umbonate on the lower part, ventral margin patulous, 1/6 lin. long. Receptacle 3/4 lin. long. Calyx ascending, truncate, ciliolate, 1/2 lin. long. Corolla over 1 3/4 in. long, truncate in bud; tube about 11 1/2 lin. long, the lowermost 3 lin. slightly swollen; lobes 10 3/4 lin. long, subspathulate above, thickened and shoulder-shaped at the apex. Filaments inserted 1 1/4 lin. above the base of the corolla-lobes, 8 1/4 lin. long, flattened, slightly tapering upwards, glabrous, tooth subulate, 1/2 lin. long; anthers oblong, 1 lin. long, about 1/3 lin. broad, emarginate at the apex. Disc annular, hardly lobed, 1/6 lin. high.