RHIZOMES AND ROOTS. 



237 



PLATE CIIL 



FIG. 113. Powdered Hydrastis Rhizome (x240). 



a, Starch grains. 



e, Epidermis of the root, surface view. 



end, Endodermis of the root. 



ffv, Portion of fibrovascular bundle of root. 



I, Bast. 



,pc, p'c', Cortical parenchyma of rhizome in longitudinal and transverse 



section. 



per, per', The same of the root. 

 pi, Wood parenchyma of rhizome, 

 s', s', Cork in surface view and profile. 

 tr, Tracheids from rhizome. 

 v, vs, Vessels. 



