Description from Flora of China 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. B