-14- 



Pty.lodendron 97* 



Pho;ma 184, 



Phoradendron 178 o 



Phycocecidja Cf , Algae, 



Piiycomycetesj ITeiv formation of cell wall after Injury' 

 10, Developing galls, Cf, Cynchytrium, 



Phyl Ian thus 97s 



Phyllerium 104, 



Phylloxera 179; 



Physiological Wound -^ 97, 154^ 170. 



Phyteu:ma lie r 



Phytocecidia, Cf, Galls,» 



Phytoptccejid ja, Arr-jsted Developments 18, Multi- 

 nuclear 120m Witches brooms 187 , Proso- 

 plasmas 189x f , Kataplasmas 176, Sac galls 

 iv^2j Of, also. Kite Galls,* 



Phytoptus 105, Cf, also Mite Galls. Ph. Macrorrhyn- 

 chus, Pig» 117, 



Picea 97, 158, 184. 



Pile a ICO, 



Pineapple Galls 178» 



Pinus 27, 41, 75, 97ff., 177, 184, 186.« 



Piratinera 94fffl 



Pirus 5e, 74 J 78, 109, 120, 142, 164ff., 178ff., 185ff. 



Pistacia.97, 192, 



PisiAm 69.0 



Pith, Producing callus 143, Wound wood 162, Kataplasmas 

 182, 



Pits, In tyloses 94, In Erineum hairs 106, Abnormal 

 distribution 184, Gall sclereids 209. 



Plantago 97 « "; 



Plasjtflodiophora l76.<> 



Plasmolysis, Restitutic5n and Growth after 8.» 



Platanus 74, 97, 146,o 



Plectogjme 33. 



Pleurotaenium 9» 



Pneumatodes of Galls 219* 



Poisons, Action of 240, In gall formation 107ff« 



Polarity, In the formation of callus 152ff,, In the 

 formation of adventitious shoots 155, 

 Polarity of the cell 126!; 15 Off,, 



Pollen sacs, (or tubes), New formation of cell wall 

 after plasmolysis, etc., 9ff», Not turn- 

 ing green in the light 55, Abnoimal thick- 

 enings of the cell wall 61, Deformations 

 116.. 



Polygonum 35, 37, 44, 58, 178, 190. 



Polyides 140, 



Polypodiaceae, Regeneration of the pro thallium and of 

 the'leafl 7,« 



Pomaceae, Gnarl tubers 165« 



Populus 72ff., 97, 120, 131, 142ff., 161, 178, 192ff,, 



Portulacca 97, 



Potamogeton 62, 



Potato Scab 170. 



Potato Scurvy 170. 



Potentilla 109, 191, 



Poterium 109« 



Premature ripening after parasite infection 57, 



Progressive changes 54, 



Prosoplasmas 125, 134, 136. 



Prosoplastic Hj^ertrophy 88ff • 



Protective Palisade Cells, Hypoplasia 27, 28. 



Protective tissue of galls, 3jp5ff« 



