-18- 



^under Bushes 187, 



Tilia 74, 106ff.. 178, 193ff, 



Tissue Covering (Epidermal), Of Callus 146, Of galls 



205ff c 

 Top-shoot Galls, Indication of arrested development 



178.0 

 Topping, Influence of topping on tissue fomnation 



138ff..> 

 Tracheids in Callus 148ff,, Abnormally formed 134, 160, 

 Instead of ducts 30, , , 



Tradescantia 15, 44, 59, 90, 91, 100, 142, 150,, 

 Transpiration, Influence on, cell number 19, Differentia- 

 tion of cells and tissue 29ff., 49ff, 239, 

 Trehtepohlia 15,« 

 Trichomes of Galls 207^ 

 Trigonaspis 218* 

 Tristania 166.» 

 Triticum 71, 106, 111, 

 Tropaeolian 100.. , 

 Tyloses 69, 92, In ducts 93, In resin canals, etc, 99, 



In, the, air chambers of stoma ta 100.« 

 Tumors 202, 

 Turgor, Changes in turgor and influence on tissue forma- 



, tion 241,« 

 Turning Green 55, , " 



Tylenchus 178. 

 Tylogonus 176. 

 Udotea 10, 27. 



Ulmaceae, , Tendency to formation of tyloses 96. 

 Ulmus 44, 74, 95ff, 

 Undulated outlines of epidermal cells 70, In root ha Ira, 



Siphonae, etc, 1..21'f. 

 Uredineae, Producing galls 177. 

 IJrocystis 177. 

 Uromyces .71. 



Urtica 10, 97, 176, 202, 

 Urticaceae, Stimulus to the formation of tyloses 96, 



Hypoplasia of the cystoliths 38. 

 Ustilagineae, Producing galls 177, On the Kyrtaceae 166. 

 Ustilago 177, 190,. 

 Vaocinium 30, 177ff, 

 Vallisneria 9,. 

 Valonia 10, 



Variegated Plants, Hypoplasia: Reduction of the cell size, 

 24, Reduction of the chromatophores 31f f . , 

 Variegation dependent upon nutrition 31, upon 

 temperature 31, Crystal content 30ff ., ,Tissue 

 differentiation 42ff , 

 Vascular Bundles, Regeneration 16, Hypoplasia 45ff., Ab- 

 normal formation 1S8, 219, Activity hyperplasia 

 218ff , In Galls ,. . , 

 Vascular Tissue, Participation in abmormal production 



257, In the formation of calls 142ff,, In the 

 formation of galls 182ff., 201ff. Cf., Ducts, 

 Tracheids, Duct Tyloses, Wood and Bark. 

 Vaucheria 9ff,, 28, 115,, 

 Veining in Wood 159ff,% 

 Vergrttnung 55 (See Turiiing Green). 

 Veroinca 176. 

 Verticillium 179. 



