Minnesota Plant Diseases. xix 



FIG. 116. Fungus fruiting bodies of a gill fungus, on street railway ties. 



Photograph by Dr. F. Ramaley 236 



FIG. 117. A Stereum wound parasite. Original 241 



FIG. 1 18. Partridge wood rot. Original 242 



FIG. 119. The coral fungus, on the under surface of a log. Original. . 246 



FIG. 120. The fruiting body of the dry-rot fungus. Original 245 



FIG. 121. The dry-rot fungus on a pine board. Original 248 



FIG. 122. The dry-rot fungus on pine boards, showing later stages of 



decay than that in Fig. 121. Original 249 



FIG. 123. The fruiting body of the flattened pore-fungus, on a standing 



dead tree trunk. Original 252 



FIG. 124. Fruiting bodies of the sulphur pore-fungus, on a dead oak 



stump. Original 253 



FIG. 125. Fruiting bodies of the scaly pore-fungus seen from both sur- 

 faces. After Loyd 254 



FIG. 126. Fruiting body of the birch pore-fungus, on a branch of a 



white birch. Original 255 



FIG. 127. Fruiting bodies of an undetermined pore fungus on a bass- 

 wood log. Original 257 



FIG. 128. Fruiting bodies of the honey-colored mushroom, at the base 



of a tree. Original 261 



FIG. 129. Fruiting bodies of the fatty Pholiota in a wound of an oak 



tree trunk. Original 263 



FIG. 130. The velvet-stemmed Collybia on a decaying log. Original... 264 

 FIG. 131. Fruiting bodies of the sapid Pleurotus on a standing yellow 



birch trunk. Original 265 



FIG. 132. Fruiting bodies of the pine Lenzites, common on soft woods. 



Original 266 



FIG. 133. Tar spots of willow and maple. Original 269 



FIG. 134. Powdery mildew of willow leaf. Original 273 



FIG. 135. Powdery mildew of elms on an elm leaf. Original 274 



FIG. 136. Pine knot on Scotch pine. Original 276 



