Reynoutria japonica

Reynoutria japonica Houtt. is a dye plant used in the Dong communities of Central China to dye food and cloth.

Colors
It yields a red colour.

Parts used
Colorants are extracted from the roots of the plant.

Synonyms
Local names are: 虎杖 [Hǔ zhàng] in Mandarin and Xiong shen in Dong communities.