Henslowia polyneura Hu, Bull. Fan Mem. Inst. Biol., Bot. 10: 157. 1940.

Woody vines 30-40 cm tall. Stems terete, striate, with small bullate tubercles, more dense when mature. Petiole flat, 5-7 mm; leaf blade variable in shape, usually obovate to suborbicular, 2-4.5 × 2-3.5 cm, papery, basal veins 7-9, prominent on both surfaces, base cuneate, margin cartilaginous, minutely crisped, apex obtuse. Male inflorescences fasciculate, 6-flowered; peduncle 0.5-1 mm. Female inflorescences 1-5-flowered; peduncle 1-1.5 mm. Flowers unisexual (plants dioecious). Male flowers: perianth lobes triangular, ca. 0.8 mm; stamen filaments short. Female flowers: bracteoles several, ovate, ca. 2 × 1 mm, apex acute; perianth yellow, conic, ca. 1.8 mm, lobes 5, similar to male. Disk 5-angled. Style absent; stigma capitate. Drupe yellow, ovoid, ca. 4 mm, inconspicuously ridged. Fl. Dec-Mar, fr. May-Jul.

Although the combination is usually attributed to D. D. Tao (Index Fl. Yunnan. 1: 774. 1984), that work gives only authorities and dates, not places of publication of basionyms, and thus proposed new combinations are invalid. The combination was effectively validated in FRPS, where the full basionym citation is given.

Mixed montane forests; 1400-2000 m. Yunnan [Vietnam].