771 



Phytase, 58 



Phytocecidia, 385 



Phytomyxa, 9; leguminosarum, 11 



Phytomyxales, 8 



Phytopathological Society, American, 



411 

 Phytopathology, 411; definition of, 



272 

 Phytophthora infestans, 315, 542; es 



cape of zoospores, 67; infection by, 273 

 Pichia, 141 



Pilacraceae, characters of family, 217 

 Pilobolus, figures of species, 102; crys- 



tallinus and horses, 68; occurrence 



of, 83 

 Pineapple chlorosis, 650 

 Pink disease of cacao, 490 

 Piptocephalidacea;, characters of, 103 

 Piptocephalis parasitic on Mucor, 83 

 Pistillody, 338 

 Pith flecks, 294 

 Placing of cement, 321 

 Plague, 35 



Planococcus, 35; citreus, 35 

 Planosarcina, 35 

 Plant juices, 598 

 Plant pathology, growth of, 410; 



special, 411 et seq. 

 Plants as disease producers, 298 

 Plasmodiocarps, 13 

 Plasmodiophora, 9; alni, 9; brassicas, 



9, 387, 487, 488; on cabbage roots, 



figure of, 488; figure of, 10; eleagni, 9 

 Plasmodium, aggregate, 8; colors of, 12; 



malarias, 18; movement of, 12 

 Plasmopara viticola, 513; distribution 



of, 84; figure of, 113 

 Plasmolysis, experiments with, 653 

 Plate counter, 628 

 Plectenchymatous, 258 

 Plectasciinea?, characters of, 143 

 Plectridium, 25 

 Pleiomorphy, 338 

 Pleiophylly, 329, 338 

 Pleiotaxy, 338 

 Plesiasmy, 338 

 48 



Pleurotus, 'description of genus, 737; 

 olearius, 62; ostreatus, description of, 

 738; figure of, 738; serotinus, de- 

 scription of, 738, 739; sapidus, de- 

 scription of, 738; ulmarius, descrip- 

 tion of, 739 



Plowrightia, description of several spe- 

 cies, 162; raorbosa, 74, 540; distribu- 

 tion of, 84; figure of, 73 



Plugging test-tubes, 586 



Plum, black-knot of, 540; pockets, 74,541 



Pod-spot of pea, 534 



Podospheera, key to species, 722 



Poisoning by fungi, symptoms, 238, 239 



Poisonous substances in fungi, 238 



Pollaplasy, 338 



Polyangium, 40 



Polychrome methylene blue, 591 



Polyclady, 338 



Polyphagus euglenae, occurrence of, 117 



Polyphylly, 338 



Polyporaceae, characters of family, 224 



Polypores, manual of, 227 



Polyporoideas, characters of, 226 



Polyporus borealis, 517; mylittae, sclero- 

 tium of, 71; ofiicinalis, analysis of, 

 55 ; ponderosus, 539; sapurema, sclero- 

 tium of, 71; sulphureus, 526; figure 

 of fruit, 527; figure of decaying oak, 

 528; on trees, 83; with trehalase, 58; 

 tuberaster, sclerotium of, 71 



Polysphondylium violaceum, 8 



Polystictus abietinus and rotting of 

 slash, 75; socer, sclerotium of, 72; 

 versicolor, 64, 545 



Poppy, fasciated, figure of, 336 



Poplar cutting, figure of, 378 



Populin, 59 



Populus pyramidalis, cuttings of, 379 



Potassium hunger, 277 



Potato, 542; as medium, 596; broth, 597; 

 curly-dwarf of, 576; glycerinated, 596; 

 juice, 596; late-blight, 542; rot, 

 experiments with, 643; scab, 544 



Pouring plates, figure of, 622; method 

 of, 622, 623 



