RHIZOMES AND BOOTS. 



251 



PLATE CX. 



FIG. 120. Powdered Orris Rhizome (x 240). 



a, Starch grains. 



cr, C'P', Whole and broken crystals of calcium oxalate. 



end, Endodermis. 



fv, Debris of fibrovascular bundle. 



pc, Cortical parenchyma. 



pi, Parenchyma of stele. 



ppc, ppl, Debris of same. 



tr, v, Vessels, etc. 



