FIG. 76. Mycorhiza . to the left is the up 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 hyphae; B, part of longitudinal section of orchid root 

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

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

 After FRANK. 



FTO. 77. Mycorhiza : A, rootlets of w*iite poplar forming mycorhiza ; B, enlarged 

 section of single rootlets, showing the hyphte penetrating the cells. After 

 KBKNBB. 



