-15- 



^oteins, Abnormal accufliulation 58, 



Frotein layer in galls 216 « 



Prothallia, Regeneration 7, 9, Plasmolyzed cells 9, 



Tracheids in 250., 

 Protomyces 177* 



Protonema, .'Deformed cells 117, 

 Protozoa, Restitution of the cells 12ff., Hypoplasia 



Prunus 35ff, 74, 97, 100, 106ff., 120, 193ff. 



Psev^do-bulbils in Selaginella 179. 



Pseudo-nucleolo 121» 



Psyjlod-., Prcducing galls 179. ' 



Pteridium 17v, 



Pteridophytes, Galls of the 179, V/itches "brooms on 

 the 187, Cf , also Protha,llira. 



Pterocarya 97,« 



Puccinia 71, 



Pteris 18&» 



Pustule Galls 178ff, 



Querous 74, 97, 107ff., 109» 179, 196fft (Cynides 

 galls). 



Ranunculus 50, 121» . 



Raphanus 50, 187. 



Receptive Stimuli 229-^ 



Redwood 130. 



Regeneration 6. 



Regressive Changes 54, df;. also Degeneration. 



Resin Ducts, Pilled wi,th tyloses 99, In wound wood 

 158, In gall wood 184, 188, 



Restitution 47, Of the cell 7, Of the tissues 14, 90. 



Restitution, of the cej.! walls in injured and plas- 

 molyzed cells, 9ff., Construction, Structure, 

 Capacity for growth 11, 60, Influence of the 

 nucleus 12* 



Retinospora 17 » 



Rhamnus 30, 177ff, 



Rhinacola 198, 



Rhiaoids, Regeneration ot the rhizoids in liverworts 

 15, Abnormal wail thickenings 61» 



Rhodophyceae , Regeneration of the bark tissue 15.« 



Rhodymenia 179« 



Rhus 74, 97ff<, 



Ribes 74, 77ff,, 165, 169, 



Ricinus 8;, 89, 91, 97, 150. 



Robinia 74, 95ff, 



Roesteligi 30, 



Root Hairs, New forxnation of cell walls after plas- 



molysis, etc, 9, Hypoplasia 44, Abnormal 

 thickenings 61, , Abnormal forms 118ff. 



Roots, Resemblanpe to strings pf beads 115, Abnormal 

 structure in Cardamine and Roripa 128, Len- 

 ticel excrescences 74ff,, Jlxcrescenceg 

 resembling intumescences 78, Tyloses 96, 

 Callus 147ff , I53ff , Wyun4 wood 151, Dahlia 

 tubers 133, Gnarl tubers 166, Root primordia 

 developed into tuberous swellings 138, Root 

 galls, etc, 120, 178, 187, etc, Cf,.also 

 Club Root a'alls.* 



Roripa 128, 



Rosa 17, 78, 97, 135, 141ff., 164. 



Rosahoff 's Crystals 60* 



Rosiflora, Scanty formation of tyloses 96, Erinetua 

 109, 



