Shrubs to 6 m tall. Petiole 8-12 mm, pubescent; leaf blade abaxially greenish, adaxially intense green, narrowly ovate to ovate-elliptic, rarely obovate, 5-15 × 3-8 cm, abaxially densely pubescent, adaxially sparsely pubescent, more densely so on veins, base broadly cuneate to rounded, margin serrate, apex acuminate to long acuminate. Flowers solitary or in threes in cymes. Calyx 1-1.2 cm, pubescent; tube 1-5 mm; lobes linear, 5-10 mm, pubescent. Corolla white or reddish, gradually turning red at anthesis, funnelform-campanulate, 2.5-3.5 cm, outside sparsely pubescent or subglabrous; base of tube narrowly tubular, abruptly enlarged above middle; lobes spreading, subregular, glabrous. Filaments white; anthers yellow-brown. Stigma discoid. Fruit 1.5-2 cm, crowned with a short beak, sparsely pubescent; seeds narrowly winged. Fl. Apr-May, fr. Aug-Sep.
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