Description from Flora of China
Shrubs scandent. Branchlets gray-brown, sparsely pubescent when young, glabrescent. Petiole 2-10 cm, pubescent when young, glabrescent; leaf blade abaxially gray-yellow and adaxially dark yellow-brown when dry, broadly ovate, broadly obovate, or suborbicular, 6.5-11 × 4-8 cm, papery, abaxially villous along veins, adaxially glabrous or sometimes pilose along midvein, secondary veins 6-8 on both sides of midvein, branched, obliquely ascending, base shallowly cordate to subrounded, margin distally roughly serrate from middle, apex cuspidate or shortly acuminate. Inflorescences corymbose, 8-17 cm wide, villous when young, glabrescent. Sterile flowers with expanded sepal 1, ovate, 2.5-3.1 × 1.4-2 cm. Fertile flowers with calyx tube obconical, ca. 2 mm; teeth triangular, ca. 0.5 mm. Petals oblong, 1.8-2 mm. Stamens subequal, ca. 3 mm at anthesis; anthers subglobose, ca. 0.5 mm. Style apically 5-fissured. Capsule (immature) obconical, 4-5 mm, glabrous, apex slightly projected and resembling a convex lens. Fl. May-Jun.
* Mixed forests in valleys along stream banks; 100-1200 m. Anhui, Zhejiang.