5T4 



INDEX TO THE ILLUSTRATIONS. 



TARAXACUM DENS LEONIS, 513 

 Tax us baccata, 895 

 Tetragonolobus 531 

 Theobroma Cacao, 545 

 Thistle, 98 

 Tilletia caries, 321 

 Tradeacautia Virginica, 12 

 Trapa natans. 163 

 Trichomanes, 377 

 Tsuga Canadensis, 152 

 Tuber melanosporum, 285 



ULVA, 224 



Uncinula adunca, 281 



Urtica macrophylla, 61 



Urtica nrens, 491 



Usnea barbata, 302. 304, 308 



Ustilago antherarura, 320 



Ustilago Maydis, 320 



VACCINIUM MYRTILLUS, 511 



Vanilla planifolia, 471 



Vauclieria sessilis, 47, 251, 252, 



253 



Vibrio Rugula, 213 

 Vicia faba, 38, 69, 474 

 Viola tricolor, 20, 422, 423 

 Virginia Creeper, 154 

 Vitis, 79, 80 

 Vitis vinitera, 538 

 Volvox globator, 244 



WALLFLOWER, 552 

 \Velwitscliia mirabilis, 60, 414 



YEAST PLANT, 39, 214 



ZEA MAIS, 113, 154, 160. 451, 452 



