464 



BOTANY AND PHARMACOGNOSY. 



— Ca 



Fig. 200. Transverse section of a somewhat woody piece of belladonna root near the 

 cambium: C, parenchyma of the cortex, some of the cells shown with cryptocrystalline 

 crystals of calcium oxalate (Ca); S, sieve; C, cambium; M, medullary rays; WF, wood- 

 fibers; T. trachete; P, parenchyma of pith, some of the cells with cryptocrystalline crystals 

 of calcium oxalate. 



