RHIZOMES AND ROOTS. 



235 



PLATE CI1 



FIG. 112. Powdered White Hellebore (x 240). 



a, Starch grains. 



CCP, Cells with acicular crystals. 



coif Collenchyma of rhizome.^ 



col', Collenchyma of root. 



END, Endodermis of rhizome. 



end, Endodermis of root. 



EP, Tegumentary tissue of rhizome, surface view. 



ep, Epidermis of root, surface view. 



f, Sclerenchymatous fibres of root. 



L, Bast of rhizome. 



PC, Cortical parenchyma of rhizome. 



pc, Cortical parenchyma of root. 



PL, Parenchyma of stele of rhizome (after treatment with potash). 



V, Vessels of rhizome. 



v, Vessels of root. 



