BARKS. 



209 



PLATE XCII. 



t'm 



FIG. 102. Powdered Simarouba Bark (x240). 



ccr, Cells containing calcium oxalate. 



cp, Pitted cells. 



cr, Prismatic and rhonibohedral crystals of calcium oxalate. 



fl, Bast fibres. 



1,1', Bast in longitudinal and transverse section. 



pc, Cortical parenchyma. 



rm, n'm', Medullary rays in radial and tangential section. 



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



sc, Sclerenchymatous cells, isolated and in groups. 



