Transportation of seeds, 52-64, 69-73. Traps of plants, 176-183. Trees, flowers of, 209, 211. Trunk, a stem, 119. section of, 121, 147. Tube flowers, 249-255. Tuber, defined, 217. Tulip, stem of, 148. parts of, 193. an early spring flower, 216. Turnip root, 102. U Underground roots, 111. Underground stems, 104, 105, 150, 216, 217, 219. V Veinlets, described, 137. function of, 160. Veins, described, 137. function of, 160. significance of, 165. Venus’s flytrap, leaf of, 181. Violet, a spring flower, 203, 209. plan of, 220. spur of, 226. Violet, yellow, 203. Virginia creeper, 116. W Wake-robin, a spring flower, 216. plan of, 219. Walnut, seed leaves of, 87, 88. seed of, 90. a fruit, 95. Water lily, stem of, 116, 117. Water roots, 111, 112. Wheat seed, a food, 91. White baneberry, 49. White clover, stem of, 117. White elm, flower cluster of, 210. Wild beach plum, 40. Wild carrot, 246, 247. Wild geranium, plan of, 220. seed dispersal of, 65, 66. Wild ginger, a spring flower, 216. plan of, 219. seedbox of, 219. Wild pear, 118. Wild rose, 33. Willow, seed appendages of, 61. roots of, 111, 112. Willow herb, pod of, 58. seeds of, 61. Wintergreen, leaves of, in winter, 184. berries of, 49. Witch-hazel, flower of, 63. nut of, 63-65. seed of, 64. Wood lily, stem of, 105. Woolly leaves, 172. Y Yellow adder’s tongue, an early spring flower, 203, 216. plan of, 219. Yellow false foxglove, 112, 225, 226. Yellow violet, 203.