Description from Flora of China
Broussonetia sieboldii Blume.
Shrubs, scandent, flowers always produced on leafy stems; dioecious. Bark blackish brown. Branchlets conspicuously spreading, pale gray pubescent when young, glabrescent. Leaves spirally arranged; petiole 0.8-1 cm, pubescent; leaf blade ± ovate-elliptic, simple or occasionally 2- or 3-lobed, 3.5-8 × 2-3 cm, scabrous and glabrous, base cordate to cuneate, margin finely serrate with glandular serrations at apex, apex attenuate to shortly acuminate. Male inflorescences spicate, 1.5-2.5 cm. Female inflorescences globose. Male flowers: calyx 3- or 4-lobed, adaxially pubescent; anthers yellow, elliptic-globose. Female flowers: style linear, exserted. Syncarp ca. 1 cm in diam., with stellate clusters of stout strongly barbed hairs. Fl. Apr-Jun, fr. May-Jul.
Broussonetia kaempferi var. kaempferi is endemic to Japan.
The bark fibers are used for making paper.
* Scrub, along trails on slopes; 300-1000 m. Anhui, Chongqing, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Taiwan, SE Yunnan, Zhejiang.