FIG. 149. Mycorrhiza: 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 hyphae; 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 FUANK. 
FIG. 150. Mycorrhiza: A, rootlets of white poplar forming mycorrhiza; S, enlarged 
section of single rootlets, showing the hyphae penetrating the cells. After 
KERNEB. 
