54 § 
Reed.—On the Anatomy of some Tubers . 
Fig. ii. Transverse section of tuber, showing interfascicular cambium (intf cam.) forming radial 
rows of parenchyma cells ( M.ry .). 
Fig. 12. Transverse section of young tuber, showing the early stages of cell division at periphery 
of medulla. 
Fig. 13. Transverse section of older tuber, showing the radially arranged medullary parenchyma. 
Fig. 14. Transverse section of old tuber, showing the isolated strands of xylem and extensive 
development of xylem parenchyma. 
