585 



FIG. 246. Belladonna root: A, transverse section of older root in which the 

 xylem or woody portion is fully developed, showing cork cells (K); starch- 

 bearing parenchyma (P); microcrystals of calcium oxalate* (Co); wood 

 fibers (W); tracheae (7 1 ); medullary rays (M). B, transverse section of a 

 lateral root in which the xylem portion is not so fully developed, letters same 

 as in A. After Collin. 



