PLANT DISEASES 



265 



so often found on dead or decaying trees, the yeasts, 

 the rusts and smuts of grains, mildews of grapes and 

 potatoes, and the powdery mildews of lilacs and roses. 



FIG. 134. Varieties of the Most Common Kinds of Fruiting Bodies of Fungi. 



2, a gill fungus; 3, caterpillar fungus, one on grub and other on fly; 4, club fungus; 5, car- 

 rion fungus; 6, pore fungus; 7, a morel; 8, puff-ball; g, truffle; 10, cup fungus; n, sac- 

 spore-capsule of powdery mildew (highly magnified). 2-8, after Engler and Prantl; io : 

 after Rehm; 9 and n, after Tulasne. 



