Branchlets subtended at the base by several reduced leaves, 1 1/2–6 in. long, much compressed, nodose, glabrous, finely striate and dark in a dried state; internodes 3/4–2 1/2 in. long. Branches fairly stout, 2–3 lin. in diam., dark brown, longitudinally wrinkled in a dried state, rather densely and inconspicuously lenticellate, lenticels elongating to form small longitudinal cracks. Leaves opposite or subopposite, narrowly elliptic-oblong or lanceolate, rounded or obtuse at the apex, rounded at the base (more rarely obtuse), 1 1/3–3 1/4 in. long, 9–15 lin. broad, coriaceous, glabrous, faintly and finely reticulate, especially on the upper surface; lateral nerves about 3 on each side, very oblique, slightly raised on both surfaces; petiole 1–5 lin. long. Umbels axillary, solitary, about 8-flowered, glabrous; peduncle 3 1/2–4 lin. long; pedicels about 3 lin. long; bract unilaterally developed, broadly ovate or quadrangular from a disc-shaped or saucer-shaped base, truncate or subtruncate, umbonate, dorsal margin 5/8 lin. long, ventral margin spreading or patulous, 1/6 lin. long. Receptacle and calyx together suburceolate, about 1 1/4 lin. long. Calyx suberect, 1/4 lin. long, very shallowly lobed; intramarginal ring 1/8 lin. high. Corolla about 1 3/4 in. long, glabrous outside; tube split unilaterally 6–6 1/2 lin. down, basal swelling ellipsoid, 2 1/2 lin. long; lobes erect, subspathulate-linear, acute, 4 1/2 lin. long, upper part boat-shaped, linear-lanceolate seen from within, 2 3/8 lin. long, 1/2 lin. broad, strongly keeled outside, with a hard inner layer sharply demarcated at the base. Filaments inserted about the base of the corolla-lobes, deflexed, tapering upwards, 2 3/4 lin. long, tooth 1/6 lin. long; anthers linear, 1 3/8–1 1/2 lin. long, connective slightly exceeding the cells. Disc shortly lobed, 3/8 lin. high. Style slightly thickened into the base, skittle-shaped above, thickened part 2 1/2–3 lin. long, neck 1 1/4 lin. long; stigma depressed-globose, not distinctly lobed.
