RHIZOMES AND ROOTS. 



247 



PLATE CVIII. 



FIG. 118. Powdered Male Fern Rhizome (x 240). 

 a, a', Starch. 



e, Epidermis. 



ec, Fragments of scales. 



end, Endodermis. 



go, Oleoresin cells. 



h, Hypoderma. 



I, Bast. 



la, Lacunae in ground tissue. 



pa, p'a', Ground tissue in longitudinal and transverse section. 



per, Pericycle, 



tr, vs, Vessels, etc. 



