Fig 1 8. Transverse sectipa through a yovmg stem of Boehmeria 

 argentea, a Dicotyledon ; 0, epidermis ; Co, outer cortex (collenchjrma) ; 

 B, inner cortex ; S, intercellular space ; C, cambium ; B, bast ; H, 

 xylem portion of vascular bundle ; Z, medullary ray ; M, pith. 

 (Magnified 120 times.'. 



