Minnesota Plant Life. xiii 



FIG. 22. Development of mushroom-fruits on their underground vege- 

 tative tract. After Atkinson. Bulletin 138, Cornell Ag. Exp. 



Station 64 



FIG. 23. Warty puff-ball. After Lloyd 68 



FIG. 24. Tufted puff-ball. After Lloyd 69 



FIG. 25. Pocket-fungus on sand-cherry. After Bailey. Bulletin 70, 



Cornell Ag. Exp. Station 74 



FIG. 26. A morel fruit-body. After Lloyd 75 



FIG. 27. Cup-fungi growing on decaying twig. After Lloyd 76 



FIG. 28. Leaf-spot disease caused by fungus. After Halsted 82 



FIG. 29. Leaf-spot fungus growing on pear leaves. After Duggar. Bul- 

 letin 145, Cornell Ag. Exp. Station 83 



FIG. 30. Fungus spot-disease of strawberry leaf. After Bailey. Bulletin 



79, Cornell Univ. Ag. Exp. Station 84 



FIG. 31. Fungus spot-disease on leaf of false Solomon's seal. After 



Halsted 85 



FIG. 32. Fungus spot-disease on pear. After Duggar. Bulletin 145, 



Cornell Ag. Exp. Station 86 



FIG. 33. Fungus spot-disease of bean pods. After Halsted 87 



FIG. 34. Twig-fungus on currant canes. After Durand. Bulletin 125, 



Cornell Exp. Station 88 



FIG. 35. Rock-lichens growing profusely in a glacial pot-hole. Near 



Taylor's Falls. After photograph by Mr. E. C. Mills 92 



FIG. 36. "Old man's beard." A lichen growing attached to the twigs 

 of tamarack. Lake Superior, north shore. Natural size, six 

 inches in length. After photograph by Professor Bruce Fink 93, 



FIG. 37. A lichen growing upon a rock, and covered with the charac- 

 teristic saucer-shaped fruits of its fungus component. After 

 Atkinson 95 



