GALLS. 



287 



PLATE CXXVI1L 



FIG. 138. Powdered Galls x 240). 



a, Starch. 



cci, Crystal cells. 



cr, Prismatic and rosette crystals, 



e, Epidermis, surface view. 



ffv, Fibre-vascular bundles. 



pa, Starchy parenchyma. 



P6j p'e', Cells of the outer layer in surface view and transverse section. 



pi, Cells of the inner layer. 



pm, Cells of the middle layer, with fragment of tannin. 



sc, Sclerenchymatous cells. 



ta, Tannin. 



v, Vessels. 



