Smilax megalantha C. H. Wright var. asperata F. T. Wang.

Vines climbing. Stem branched, 1--2 m, terete, woody; branches ± verruculose or spinulose-verruculose. Petiole 0.5--1.5 cm, winged; wings 4--10 × 2--3 mm; abscission zone distal; tendrils sometimes present. Leaf blade elliptic, ovate, or lanceolate, 4--10 × 1.5--5.5 cm. Inflorescence borne in axil of young leaf on new branchlets, of 1 umbel, basally not prophyllate; peduncle 1--2.5 cm; umbels of both sexes several flowered, base slightly thickened, sometimes elongate. Male flowers: outer tepals yellowish green, 4.5--5 × 1.8--2 mm. Female flowers: tepals 4.5--5 mm; staminodes 6. Berries red, globose, 1--1.5 cm in diam. Fl. Mar--Apr, fr. Oct--Nov.

Forests, thickets, grassy slopes, shaded roadsides; 800--2900 m. Gansu, Guangxi, Guizhou, Hunan, Sichuan, Yunnan [Myanmar].