伞形紫金牛 san xing zi jin niu

Shrubs 1-3(-5) m tall, without creeping rhizomes. Branchlets subterete, 3-5 mm in diam., reddish glandular papillate, early glabrescent. Petiole canaliculate, 5-8 mm, usually sparsely papillate; leaf blade elliptic to oblanceolate, 11-13 × 2-3 cm, papery, densely punctate, glabrous or puberulent to crisped, strigose abaxially, base broadly cuneate, margin entire to undulate or rarely crenate and punctate, with vascularized nodules, apex acuminate; lateral veins ca. 15 on each side of midrib, obscure, marginal vein absent. Inflorescences terminal panicles of corymbs, papillate, on specialized lateral branches 20-40(-50) cm. Flowers papery, white or pinkish to red, 6-8 mm. Pedicel 1-1.5 cm, papillate, glabrescent. Sepals ovate to elliptic, 2.5-3 mm, sparsely glandular papillate abaxially, glabrescent, densely black punctate, margin entire, glabrous, apex obtuse. Petals nearly free, broadly ovate, densely black punctate, sparsely glandular granulose adaxially at base, margin entire, apex acute. Stamens ca. 2/3 as long as petals; filaments shorter than anthers; anthers ovate or broadly lanceolate, longitudinally dehiscent, densely punctate dorsally, apex acute. Pistil subequal to petals; ovary punctate, glabrous; ovules ca. 5, uniseriate. Fruit reddish, globose, ca. 8 mm in diam., minutely punctate. Fl. Apr-May, fr. Nov-Jan.

Evergreen broad-leaf and mixed forests, hillsides and scrub; 300-1800 m. Guangxi, Yunnan [Vietnam]