Herbs to 1 m tall, perennial. Stems subterete, glabrous or subglabrous. Petiole 2-3.5 cm, sparsely puberulent or glabrescent; leaf blade lanceolate to oblong-lanceolate, 12-17 × 3-5(-7) cm, membranous, both surfaces glabrous or glabrescent, abaxially paler, adaxially dark green, secondary veins 8-12 on each side of midvein, base cuneate, margin entire to undulate, apex acuminate. Inflorescences axillary or terminal, racemes, 7-20 cm; peduncle sparsely pilose or glabrescent; bracts linear-lanceolate, 2-3 mm, pilose or glabrescent; bracteoles linear, ca. 1 mm. Pedicel 2-3 mm. Calyx 6-8 mm; lobes linear-lanceolate, 3-4 × 1.5-2 mm, glabrous, apex acuminate. Corolla rose, 3-4 cm, outside glabrous; tube basally cylindric for ca. 1 cm; lobes suborbicular, 7-12 mm, subequal, margin dentate. Staminal filaments 6-12 mm, pilose; anther thecae 4-5 mm, muticous at base; staminodes 1-4 mm. Ovary glabrous; style ca. 1.8 cm, pubescent. Capsule not seen. Fl. Oct-Jan.
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