THE DEUG DIOSCOREA. 



25 



the different kinds. The same common names are used for all of the 

 species. Wild j^am is the name used over the largest area. The 

 following names have also been reported by correspondents of the 



y- 



FiG. 8.- — Kbizome of Dioscorea glauca. Typical drug from South Portsmouth, Greenup 

 Co., Ky., collected by John Butler. (Two-thirds natural size.) 



Department of Agriculture: Colicroot, chinaroot, devil's-bones 

 (North Carolina) ; hobs-grub (Tennessee) ; rattlebox, cramproot 

 (Kentucky). 



180 



