龙骨酸藤子 long gu suan teng zi

Vines or shrubs, reddish hirtellous-tomentose on branchlets, petioles, and inflorescences. Branchlets terete, 2-3 mm in diam. Petiole subterete, somewhat canaliculate at blade, (2-)2.5-3.5(-5) mm; leaf blade oblong or lanceolate, (1.2-)2-3.5(-4.4) × (0.8-)1-1.2(-1.8) cm, membranous, glossy, sparsely glandular papillate and red-black punctate toward apex, base subcordate or truncate, margin crenate with spinose teeth, apex mucronulate, acute to acuminate, sometimes emarginate; midrib prominent at both surfaces, reddish hirsute; lateral veins below, (12-)14-20 on each side of midrib, submarginal vein present. Inflorescences axillary, umbellate, subsessile, 8-10 mm, 1-3-flowered, pendulous; bracts oblong, 0.8-1 × 0.3-0.5 mm, margin entire, regular, glandular ciliate. Flowers pink, 5-merous, staminate and bisexual, 3-4 mm, pistillate unknown. Pedicel 1-2.5 mm. Sepals triangular-ovate or ovate, red and black punctate, glabrous, margin entire, glandular ciliate, apex acute. Petals free, oblong or oblanceolate, papery, glabrous outside, densely yellow glandular granulose inside except near filaments, black punctate and punctate-lineate, margin entire, glandular ciliate, apex rounded or obtuse. Stamens slightly longer than petals in staminate flowers, subequal to petals in bisexual; anthers in staminate lanceolate, in bisexual ovate, base deeply cordate, apex apiculate, black punctate. Style glabrous; stigma punctiform. Fruit red, globose, 3-5 mm in diam., densely red and black punctate. Fl. Dec-Feb, fr. Jan-Mar.

Mixed forests, hillsides, valleys; 1000-2400 m. Guangxi, Yunnan [Vietnam]