Young branchlets puberulous, older ones stout, wrinkled, glabrous; internodes 6–10 lin. long. Leaves subopposite, ovate, ovate-elliptic or ovate-lanceolate, obtuse or subacute at the apex, obtuse or subcuneate at the base, 1 1/4–2 1/2 in. long, 6–13 lin. long, thinly coriaceous, glabrous; lateral nerves oblique, 2–3 on each side of the midrib; petiole 3–5 lin. long, channelled and pubescent above, puberulous below. Umbels axillary, solitary or fascicled, 3–4-flowered; peduncle, pedicels and bract puberulous; peduncle 3/4–1 1/4 lin. long; pedicels 3/4–1 lin. long, stout; bract ovate-saucer-shaped, umbonate above the middle, minutely ciliate, dorsal margin 5/8– 3/4 lin. long, ventral margin 1/8 lin. long. Receptacle and calyx together cupular or suburceolate, 1 1/2–1 3/4 lin. long. Calyx shortly 5-toothed, minutely ciliate, 1/4– 3/8 lin. long; intramarginal ring 1/8 lin. high. Corolla 1 1/4 in. long, minutely and sparingly pilose outside; tube split unilaterally 6 lin. down, basal swelling ellipsoid, 2 1/4 lin. long, 5-grooved; lobes sublanceolate-linear, 4 1/2 lin. long, coherent above, thickly keeled, the upper 2 1/2 lin. with a hard inner layer. Filaments deflexed, 3 lin. long including the tooth, tapering upwards, tooth 1/6– 1/5 lin. long; anthers linear, 1 3/8–1 1/2 lin. long. Disc pentagonal, 1/5 lin. high. Style skittle-shaped above, thickened part 2 3/4–3 lin. long, neck 1 3/8 lin. long; stigma ellipsoid or subglobose, over 3/8 lin. in diam.
