Stems erect, rarely trailing, 20-30 cm tall. Leaf blade oblanceolate to suboblong, margin irregularly dentate. Corolla white or whitish green, 1.5-2 cm.

Used medicinally.

Streamsides, roadsides, wet grassy slopes; 400-1400 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, Qinghai, Sichuan, Taiwan, Yunnan, Zhejiang [Japan, Korea]