Minnesota Plant Diseases. xvii 



FIG. 77. Spores of a grass rust fungus (Puccinia vexans). Highly mag- 

 nified. Microphotograph by E. W. D. Holway 165 



FIG. 78. Various basidia and spores of the lower basidium-bearing 



fungi. Highly magnified. After Brefeld 166 



FIG. 79. Jew's ear fungus fruiting bodies on a dead branch of a balsam 



fir. Original 167 



FIG. 80. A trembling fungus on the end of a log. Original 168 



FIG. 81. Basidia and basidiospores of the higher basidium-bearing 



fungi. Highly magnified. After Brefeld and Schroeter. .. i/o 



FIG. 82. A smothering fungus growing on the ground. Original 17- 



FIG. 83. Club fungi on a decaying log. Original 1/3 



Fie. 84. The coral fungus on the under side of a log. Original. . 174 



FIG. 85. A pore fungus, growing on the ground. Original 176 



FIG. 86. A stick-dwelling gill fungus, on a dead branch of a birch. 



Original >77 



FIG. 87. The shaggy-mane fungus. Original 1/8 



FIG. 88. The shaggy-mane fungus a later stage than that shown in 



Fig. 87. Original 1 79 



FIG. 89. The common wild mushroom fruiting body. Original iHo 



FIG. 90. A group of the common gemmed puff-balls, just before open- 

 ing. Original 181 



FIG. 91. The same group as in Fig. 90, taken two weeks later. Origi- 

 nal iSj 



FIG. 9.2. Stalked puff-balls. Original |S^ 



FIG. 93. Karth Mars. Original 185 



FIG. 94. A carrion fungus. Original 187 



Fir.. 95. A carrion fungus, photographed just alter the breaking of 



the "egg," and while the cap was being lifted. Original. iKS 

 Fir.. 96. Bacteria of the black n>t <>i cabbage. Highly magnified. 



Alter H. I.. Kus>cll ify 



FIG. 97. Bacteria of fire-blight <>i appli-v Highly magnified. Alter 



B. M. Duggar. i<>? 



