Solanum biflorum Loureiro, Fl. Cochinch. 1: 129. 1790; S. biflorum var. kotoensis Y. C. Liu & C. H. Ou; S. calleryanum Dunal; S. decemdentatum Roxburgh; S. decemfidum Nees; S. osbeckii Dunal; S. osbeckii var. stauntonii Dunal.

Leaves variously pubescent, mostly greenish; blade often more than 9 × 3.5 cm. Pedicel 0.5-2 cm. Calyx 5-6 mm. Corolla pale purple or white. Anthers sometimes pubescent. Fl. May-Aug, fr. Jul-Nov.

Because no material of the Taiwanese endemic var. kotoensis has been examined, the taxon is placed in the synonymy above with some hesitation. Wet places of wastelands, forests, roadsides, by waters, valleys; 100-2300 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, S Sichuan, Taiwan, Yunnan [India, Indonesia, Japan, Malaysia, New Guinea, Philippines]