Shrubs 20-100 cm tall. Stems terete or slightly 4-sided; branchlets 4-sided, glabrous. Leaves sessile or subsessile; leaf blade ovate to elliptic, 5.5-14(-17) × 2.8-5(-7) cm, stiffly papery, both surfaces glabrous or very minutely puberulous with 1 line setose trichomes among veins, secondary veins 2 on each side of midvein, base rounded to subcordate, margin entire or minutely serrulate, apex acuminate to sometimes obtuse. Inflorescences terminal, cymose, 3-6.5 cm, 3-5(-15)-flowered, glabrous. Pedicel ca. 4 mm, glabrous. Calyx lobes repand. Petals pink, oblong to suborbicular, ca. 8 × 4.5-6 mm, slightly oblique, apex minutely acute. Longer stamens ca. 1.5 cm; anthers linear-lanceolate, ca. 6 mm; connective decurrent, slightly prolonged. Shorter stamens ca. 1.1 cm; anthers lanceolate, ca. 5 mm, base tuberculate; connective decurrent, forming a short spur. Ovary half inferior, ovate-globular, apex with a few glandular trichomes. Capsule subglobular; hypanthium bell-or funnel-shaped, ca. 5 × 5 mm, 4-sided, apex truncate. Fl. Jun-Jul, fr. Jul-Aug.
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