72 ILLINOIS BIOLOGICAL IdONOGRAPBS [238 



PLATE XVIII 



Figs. 109-113 Polystomdlopsis mirabUis. 

 Fig. 109. Photograph of a leaf showing colony. 



Fig. 110. Photomicrograph giving a general view of the center of a colony showing the 

 central umbo, the radiating ropy mycelium and several stromata. 



