Description from Flora of China
Triumfetta tomentosa Bojer; T. tomentosa var. calvescens Franchet.
Herbs woody or subshrubs to 2 m tall. Branchlets yellow-brown tomentose, hairs stellate. Petiole 1-3 cm; leaf blade ovate or ovate-lanceolate, 4-8 × ca. 2.4 cm, abaxially densely stellate tomentose, adaxially sparsely stellate hairy, basal veins 3-5, 2 lateral ones ascending beyond 1/2 blade, base rounded, margin irregularly serrate, apex acuminate. Cymes 1 to several per axil; peduncle ca. 3 mm. Flower buds densely appressed gray-white puberulent. Pedicel ca. 1.5 mm. Sepals narrowly oblong, ca. 7 mm, tomentose. Petals oblong, slightly shorter than sepals, base shortly stalked, stalk ciliate. Stamens 8-10 or rarely more. Ovary 4-loculed, spiny; stigma 3-5-lobed. Capsule globose, ca. 4 mm in diam., spiny, dehiscent into 4 valves; spines slender, 5-7 mm, puberulent, curved, tip straight. Seeds 2 per cell. Fl. summer-autumn.
Secondary forests, scrub. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Xizang, Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Thailand, Vietnam].