Fig. 6

Tannin-rich species added to the second dyeing solution. a The large (15-cm diameter) stem of the forest liana Spatholobus suberectus. b Cut stem showing characteristic red exudate. c Cut sections of Spatholobus suberectus stem. d Sliced tubers of Dioscorea cirrhosa soaking in the water. e Residue of Dioscorea cirrhosa after dyeing. f Wild harvested Dioscorea cirrhosa tuber