Fig. 76. Mycorhiza : to the left is the tip of a rootlet of beech enmeshed by the 

 fungus; A, diagram of longitudinal section of an orchid root, showing the cells 

 of the cortex (p) filled with hyphte; B, part of longitudinal section of orchid root 

 much enlarged, showing epidermis (e), outermost cells of the cortex (p) filled with 

 hyphal threads, which are sending branches into the adjacent cortical cells (a, i). 

 —After Fkank. 



Fig. 77. Mycorhiza : A, rootlets of white poplar forming mycorhiza ; B, enlarged 

 section of single rootlets, showing the hypha3 penetrating the cells.— After 



KEBNEIi. 



