针筒菜 zhen tong cai

Stachys imaii Nakai; S. modica Hance; S. palustris Linnaeus var. imaii (Nakai) Nakai; S. subargentea Hayata.

Leaves short petiolate to subsessile. Calyx campanulate. Corolla ca. 2 × as long as calyx, tube equal to slightly longer than calyx.

Bamboo forests, thickets, reed marshes, wet areas; 200-1900 m. Anhui, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Taiwan, Yunnan [India].

Used medicinally for dysentery and traumatic injury, and as a tonic. Young stems and leaves fed to pigs.