RHIZOMES AND ROOTS. 



241 



PLATE CV. 



FIG. 115. Powdered Undulatei Ipecacuanha ( x 240) 



a, Starch grains. 



cr, Acicular crystals. 



fl, Pitted wool fibres. 



I, Bast. 



pc, Cortical parenchyma. 



ph, Fhelloderm. 



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



v, Pitted vessels. 



