Dioscorea japonica
Dioscorea japonica
Dioscorea japonica Thunb.
Engl.: Japanese yam, Chinese yam.
Deu.: Japanischer Yams.
Jap.: yama no imo.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.