Shrubs or trees, 2-10 m tall; branches flattened to subterete, with usually rather dense elliptic lenticels, hirtellous to glabrous. Petiole 1-3.5 cm, glabrous or hirtellous; leaf blade drying stiffly papery to thinly leathery and paler below, elliptic, elliptic-oblong, or oblanceolate, 5-22 × 2-8 cm, adaxially glabrous, abaxially glabrous or hirtellous to strigillose on principal veins to throughout, base cuneate, acuminate, or obtuse, apex acuminate; secondary veins 9-14 pairs, often with pilosulous domatia; stipules triangular to narrowly triangular, 5-19 mm, glabrous, long acuminate. Inflorescence corymbiform, many flowered, glabrous; peduncle 2-8 cm; branched portion 2-6 × 3-8 cm (not including corollas); bracts stipuliform, linear-lanceolate, 12-15 mm, glabrous, acute; pedicels 2-6 mm. Calyx glabrous or sparsely hirtellous; ovary portion cylindrical-obovoid, 4-5 mm; lobes lanceolate to narrowly oblanceolate, 8-18 × 2-6 mm, often ciliate, acute. Corolla red or rarely white, glabrous; tube slenderly cylindrical, 30-32 mm; lobes suborbicular, 15-22 × 11-15 mm, at base with a lamellate appendage on each side inside, apex rounded. Capsules obovoid to ellipsoid-obovate, 15-25 × 5-10 mm, weakly longitudinally ridged, glabrous or sparsely hirtellous; seeds ca. 4 mm. Fl. and fr. Mar-Dec.
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