Shrubs or small trees 2-6 m tall, glabrescent. Petiole slender, 3-12 cm; leaf blade ovate, 5-25 cm, leathery, base obtuse to cordate, entire, apex obtuse or acute, glaucous, subleathery. Inflorescences many-flowered, lax panicles. Pedicel 3-12 mm. Calyx tubular, 1-1.5 cm; lobes deltate, acute, equal. Corolla yellow to red, tubular, 2.5-4.5 cm; lobes short. Stamens subequal, included. Capsules ellipsoid, 0.7-1.5 cm. Seeds brown, ca. 0.5 mm.