Young branchlets shortly tomentose; branches greyish, inconspicuously lenticellate; internodes 3/4–1 1/4 in. long. Leaves subopposite, broadly ovate, obtuse or rounded at the apex, rounded or subtruncate at the base, 1 3/4–3 in. long, 1 1/4–2 in. broad, coriaceous, rather thick, coarsely pubescent with branched hairs on both surfaces, penninerved; lateral nerves slightly raised on both surfaces; petiole 5–6 lin. long. Umbels axillary, solitary, about 16-flowered; peduncle, pedicels and bract densely rusty-pubescent; peduncle shortly clavate, 2–2 3/4 lin. long; pedicels 1 1/2–2 lin. long; bract ovate from a flat or slightly saucer-shaped base, dorsal margin 7/8 lin. long, ventral margin 1/5– 1/4 lin. long. Receptacle and calyx together shortly campanulate, 1 1/4 lin. long, rusty-tomentose. Calyx 3/8 lin. long, shortly toothed; intramarginal ring 1/6 lin. high. Corolla 1 3/4 in. long, villous-tomentose outside with shortly branched hairs; tube split unilaterally about 7 1/2 lin. down, basal swelling ellipsoid, 2 1/2 lin. long; lobes erect, subspathulate-linear, 4 1/2 lin. long, the upper part boat-shaped, 2 1/2 lin. long, 5/8 lin. broad, 7/16 lin. deep, oblong-lanceolate seen from within, hard inner layer sharply demarcated below. Filaments inserted about the base of the corolla-lobes, deflexed, 2 1/4 lin. long, slightly tapering upwards, thickened in the uppermost 1/3 lin., tooth 1/6 lin. long; anthers linear, 1 5/8–1 3/4 lin. long. Disc pentagonal, stout, 1/4 lin. high, hardly lobed. Style skittle-shaped above, thickened part about 2 3/4 lin. long, neck 1 5/8 lin. long; stigma subglobose, 1/3 lin. in diam.
