Tamarack, 101. 
Tanacetum, 66. 
Tansy, 66. 
Taraxacum, 69. 
Tare, 46. 
Taxodium, 102. 
Taxus, 102. 
Teasel, 60, 169. 
Teasel Family, 60. 
Tecoma, 77. 
Tephrosia, 45. 
Tetraphidee, 139. 
Tetraphis, 139, 170. 
Teucrium, 80. 
Thalaspi, 34. 
Thalictrum, 29. 
Thallophytes, 149. 
Thaspium, 56. 
Thelia, 141. 
Thelies, 141. 
_Theloschistes, 150. 
Thimbleberry, 49. 
Thin Grass, 123. 
Thistle, 68. 
Thoroughwort, 61. 
Three-seeded Mercury, 94. 
Three-thorned Acacia, 47. 
Thyme, 81. 
Thymeleacee, 93. 
Thyme-leaved Sandwort, 38. 
Thymus, 81. 
Tiarella, 52. 
Tick-seed Sunfiower, 65. 
Tiger Lily, 112. 
Tilia, 40. 
Tiliacez, 40. 
Timothy, 123. 
Toad Flax, 78. 
Tower Mustard, 33. 
Tracy, Cyrus M., 25. 
Tree-of-Heaven, 42. 
Trichocolea, 145. 
Trichostema, 81. 
Trichostomes, 139. 
198 
Trichostomum, 139. 
Tricuspis, 125. 
Trientalis, 75. 
Trifolium, 45. 
Triglochin, 106. 
Trillium, 110. 
Triosteum, 59. 
Triticum, 127. 
Trumpet Flower, 77. 
Trumpet Honeysuckle, 58. 
Trypethelium, 155. 
Tsuga, 101. 
Tufted Loosestrife, 75. 
Tulip Tree, 31, 169. 
Turk’s Cap Lily, 112. 
Tupelo, 58. 
Turtle-head, 78. 
Tussilago, 61. 
Tway-blade,. 109- 
Twisted-stalk, 111. 
Typha, 103. 
Typhacee, 103. 
Ulmus, 94. 
Ulva, 166. 
Umbellifere, 55. 
Umbilicaria, 151. | 
Upland Boneset, 61. 
Upright Chess, 127. 
Urceolaria, 153. 
Urtica, 95. 
Urticacee, 94. 
Usnea, 150. 
Utricularia, 76. 
Uvularia, 111. 
Vaccinium, 71. 
Vaccinium, Vitis-Idea, 12, 71. 
Vallisneria, 107. 
Vanilla Grass, 129. 
Vascular Cryptogams, 131. 
Vaucheria, 166. 
Velvet Grass, 128. 
Velvet Leaf, 40. 

