Minnesota Plant Diseases. 



413 



Gymnosporangium, 



globosum (Figs. 181, 182), 



347, 348, 349 

 macropus (Figs. 181, 182), 



347, 348, 349 



nidus-avis (Fig. 26), 57, 35 

 Habit, bee's-nest dwelling, 42 

 dung-dwelling, 37 

 food mold, 43 

 fungi on eggs, 44 

 fungus-dwelling, 42 

 honey-dew dwelling, 42 

 leaf-dwelling, 41 

 of parasites on anthers, 65 

 of parasites on fruit, 64 

 of parasites on leaves, 62 

 of parasites on stems, 63 

 of root parasites, 64 

 water mold, 36 

 wood dwelling, 40 

 yeast, 36 

 Hag fishes, degeneration in, 10 

 Hailstones, wounds caused by, 47 

 Hairy pore-fungus rot, 259 

 Half saprophytes, 35, 44 

 Hard-skinned puff-balls, 183 

 Hard woods, dry rot of, 245 

 Hasselman treatment of tim- 

 bers, 239 

 Hausschwamm, 245 

 Haw, black, powdery mildew 



of (Fig. 51), 125 



Hay-curing, bacteria of, 195 



Hazel powdery mildew, 395 

 Head smut of sorghum (Fig. 



150), 298, 299 



Heat-forming bacteria, 194 



Health, and disease, 2 



improvements of, 91 



in plants, defined, 90, 91 



Heath family, partnership with 



fungus, 50 



Heaths, gall fungi on, 170 



gall disease of, 385 



Helianthus, rust on, 373 



Helvella lacunosa (Fig. 67), 148 

 Helvellinese (Figs. 67, 68), 



146, 147, 148 



Helotium citrinum (Fig. 65), 145 



Hepatica, smut of, 392 



Hole, shot, 151 

 Hollyhocks, rust of, 372, 373 



Honey-colored mushroom, mold 



of > 394 



rot (Fig. 128), 260,261,262 



strands of (Fig. 6), 17 



Honey dew, fungi, 125, 394 



fungi, spore distribution, 29 



-dwelling habit, 42 



spores (Fig. 55), 128, 130 



spores of ergot, 307 



Honey mushroom, strands of, 16 



Hoofs, blue mold allies on, 123 



fungi on, 42 



Hops, powdery mildew of, 324, 325 



Horizontal pumps (Fig. ic8), 



220, 231 



Horn, blue mold allies on, 123 



fungi on, 42 



Hornbeam, hairy pore fungus 



on, 259 



Horseradish, white rust on, 330 

 Horses, parasites of, 74 



Host, effect of parasite on, 77 



effect of parasite on anat- 

 omy of, 87 

 effect on parasite, 88 

 infection, 97, 98 

 influence on spore germina- 

 tion, 89 

 stimulation, 82 

 Hot water method, for loose 



smut of wheat, 297 



for millet smut, 303 



for naked and covered 



barley smut, 300, 303 



for oat smut, 157 



for smuts, 225, 226 



for sorghum grain smut, 



299, 300 



House fungus rot (see dry rot). 

 Hyalopsora polypodii, 387 



Hydnaceas (Fig. 84), 174, 175 



Hydnum coralloides (Figs. 84, 



119), 174.246 



Hymenogastracese (Fig. 81), 170 

 Hypochnaceae, 171 



Hypocreaceae (caterpillar fungi), 

 (Fig. 56), 130, 131, 132 



(ergot fungi), (Figs. 53, 54), 



128, 129, 130 

 (strangling fungi), (Figs. 



57, 58), 132, 133 



(in part), 133 



Hypomyces lactifluorum, 395 



