RHIZOMES AND ROOTS. 



225 



PLATE XCVII. 



FIG. 107. Powdered Elecampane Root (x 240). 



fl, Wood fibres. 



in, Inulin. 



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



PC, p'c', Cortical parenchyma in longitudinal and transverse section 



pi, Parenchyma of the wood. 



rm, r'rn', Medullary rays in longitudinal and transverse section. 



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



v, v', vs, Vessels. 



vg, Sieve tubes. 



