RHIZOMES AND ROOTS. 



219 



PLATE XCIV. 



FIG. 104. Powdered Belladonna Root (x 240). 



a, Starch grains. 



ccn, Cells with sandy crystals. 



fl, Wood fibres. 



I, Bast. 



m, Cells of pith (of rhizome). 



pc, p'c', Cortical parenchyma in longitudinal and transverse section. 



pi, pT, Wood parenchyma (from rhizome) after treatment with potash. 



rrn, Medullary ray. 



v, Vessels. 



vg, Sieve tube. 



