Anabg.ena, 110« "^' 



Anacardiaceae, Tendency to formation of tyloses, 96,, 



Anadyomene, 10, 12. 



Anaerobic Bacteria, Spore formation, 238, 



Anaesthetica, Arresting influence on cell division, 68. 



Andricus, 206, 220ff . , A, quadrilineatus, fig. 100. 



Anherstiee, 214, 



Anemone, 27. 



Annual Plants, Transformation to perennials through 

 copulation, 133, 



Annual Ring, Abnormal; Half rings, 21. After infec- 

 tion, 22, Restitution from too strong pres- 

 sure., 22. Abnormal wood, of. Red wood and 

 Gall wood. 



Anthers, Hypoplasia, 47. 



Anthocerotaceae, 109, 



Anthocyanin, Abnormal omission of its formation, 35ffo 

 Abnormal occurrence of its foimation, 56ff, In- 

 fluence of light, 35, 56, 222, Of nutrition, 

 36, 56, 57, 58. Of injury 35., Of temperature 

 56. In galls, 56. In graft hybrids 56, Pre- 

 mature ripening 56,, In callus 150, In 

 SyTichytrium galls 103, In other gall hyper- 

 triphies 107ff , In prosoplasmatic galls, 222, 



Anthurium, 100, 



Anthirrhinum, 36. 



Antithamnion, 67, 



Ants, 115, 



Aphids, Their excretions, 60, Honey dew 60, Lignifica- 

 tion, due to aphids 62, Kataplasmas 197ff , Sac 

 galls (prosoplasmas) 192, Cf. Schizoneura, 

 Tetraneura, Aphis, Pemphigus, Lachaus!* 



Aphis, Oxyacanthae 181, Figc 75, 



Apical Cell, Abnormally enlarged 67, 



Apical Growth, &"ells with 112,. 



Apterostigma 115 o 



Aralia 75, 82, 96 o 



Araucaria 75. 



Arctic Climate, Influence j Hypoplasia 20, 45, 56. Porma- 

 tion of anthocyanin 56.. 



Aristolochia 16, 95ff., 127, 



Aristolochiaceae, Abundant formation of tyloses, 95ff,. 



Armoracia 150. 



Arrested Developments 17ff.. 



Artemisia, 220. 



Artocarpareae , Tendency to formation of tyloses 96. 



Artocarpus 96. 



Arundo 43, 96. 



Asarum 95ff . , 96, 



Ascomycetes, Gall Producing 177. 



Ascophyllum 178, 



Aspergillus 115. 



Aspidiotus 34. 



Aspidium 188. 



Asplenium 43, 



Asporgenous Genera 241, 252. 



Assimilatory Tissue. Correlative preoption of its devel- 

 opment 135. In a.bnor»ial5 Cucurbita root tubers 

 139. In galls 21 a^ Cf , Mesophyll. 



Asterodiaspis 62.. 



Atta 115. 



Aulacodiscus 28. 



Aulax 195ff ., 218. 



Aurigo 62, 



Axillary Sprouts. Transformation to swellings, 138, 166. 



Azolla 56. 109. 



