74 ILLINOIS BIOLOGICAL MONOGRAPHS (2*) 



PLATE XK 



Fig. 111. Photomicrograph of an umbo with radiating mycelium and one young stroma. 



Fig. 112. Photomicrograph showing mycelium and several stromata. 



Fig. 113. Photomicrograph of a single stroma showing numerous ostioles. 



Fig. 108. Pycnodothis Iclraceraf. Enlarged view of stromata. 



