RHIZOMES AND ROOTS. 



233 



PLATE CI. 



FIG. 111. Powdered Ginger Rhizome (x 240). 



a, Starch grains. 



ep, Epidermis. 



fp, Sclerenchymatous fibres. 



go, Oleoresin cells. 



h, Hypoderma. 



I, Bast. 



ml, Parenchyma of stele. 



pc, Cortical parenchyma, the walls somewhat swollen by treatment with 

 potash. 



p'c'i The same in longitudinal section. 



s, s' f s", Cork, in surface view, transverse and longitudinal section re- 

 spectively. 



ts, Elongated secretion cells 



v, vr, Vessels. 



