GENERAL INDEX. 



299 



Tissues, 45 

 Tissue-tension, 263 

 Tissue-iricliomes. 156 

 Torsion, 264, 277 

 Torus, 88, 216, 228 

 Tracheids, 72 

 Trama, 196 



Transpiration, 108, 126 

 Transition, 164 

 Transition-zone, 98 

 Triaxial, 183 

 Tricbogyue, 194 

 Trichomes, 61, 63, 165 

 Tuber, 158 

 Tuberidia, 158 

 Turgor, 7, 259 

 Twining, 288 

 Tyloses, 58 



Umbel, 182 

 Uniaxial, 183 

 Uredospores, 198 

 Ustilagineal, 19G 



Vacuole, 4 

 Variation, 243 

 Variation of hydrids, 243 

 Varieties, 243 

 Variety-hybrid, 241 

 Vascular bundles, 81, 83 

 Vascular cryptogams, 78 



Vaucberia, 193 

 Vegetative cells, 205 

 Vegetative rest, 237, 250 

 Vegetative period, 250 

 Velamen, 140 

 Venation, 161 

 Venter, 189 

 Vernation, 166 

 Vesicles, 259 

 Viability, 237 



Water, 150 

 Water, ascent of, 103 

 Water, conduction of, 103 

 Water, current of, 276 

 Water-plants, 133 

 Wax, 56 

 Whorl. 170 

 Winter rest, 203 

 Woody parenchyma, 73 



Xantophyll, 15 

 Xerophilous, 150 

 Xylem, 75 



Yew, 251 



Zea, 68, 85 

 Zoogametes, 191 

 Zygomorphic, 219 

 Zygomycetes, 194 

 Zygospore, 188 



