Shrubs or small trees, evergreen, 2-5(-10) m tall. Branches brown, densely red-brown glandular hairy. Petiole erect, 2.5-5 cm, glabrous; leaf blade abaxially pale green, with resinlike gland dots, adaxially deep green, cordate-ovate or triangular-ovate, (5-)10-25 × (3.3-)5-13(-16.5) cm, palmately 5-veined, glabrous, base rounded or subtruncate, sometimes slightly cordate, margin entire, apex acuminate. Panicles robust, often flat-topped, 5-10 cm, densely red-brown scaly and glandular hairy; bracts caducous, leaving scalelike scars. Flowers 4-5 cm in diam.; pedicel 4-12 mm. Sepals obovate, 8-10 × ca. 7 mm, densely red-brown scaly, with glands at base. Petals bright pink, mauve, or white with pale red veins, obovate, (1-)1.5-3 × 0.8-2 cm. Stamens many; anthers yellow, apically dehiscent. Capsule subglobose or ovoid, slightly laterally compressed, (1.4-)2-4.5 cm, usually densely purple-brown spiny, rarely smooth; spines 1-2 cm. Seeds numerous, red-brown, obovoid-angular, 4-5 mm.
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