Young branchlets glabrous, adult ones conspicuously lenticellate. Leaves opposite, ovate, acuminate or lanceolate, obtuse or subacute at the apex, rounded or subcordate at the base, 1 3/4–4 in. long, 2/3–2 in. broad, thinly coriaceous, glabrous, margin crispate; lateral nerves oblique, 4–5 on each side; petiole 2–11 lin. long, narrowly winged, wing crispate. Umbels solitary, 12-flowered or more; peduncle 2–2 1/2 lin. long; pedicels 1 3/8–1 3/4 lin. long, glabrous; bract elliptic-cupular, dorsal margin 5/8 lin. long, umbonate, umbo horned at the apex or not, ventral margin 1/8– 1/6 lin. long. Receptacle 1/2 lin. long. Calyx ascending, 1/2– 5/8 lin. long, irregularly 2–4-lobed, incisions about 1/4 lin. deep. Corolla crimson, tetragonal in bud, clavate above, 9 lin. long; tube 3 1/2–3 3/4 lin. long, split unilaterally; lobes 5 1/2–6 lin. long, spathulate, broadened into the base. Filaments inserted 5/8– 3/4 lin. above the base of the corolla-lobes, 3 1/2–3 3/4 lin. long, tooth subulate, 1/2 lin. long; anthers oblong, 7/8 lin. long, 3/8 lin. broad. Disc more or less lobed, 1/5– 1/4 lin. high. Stigma 3/8 lin. in diam.
