554 



INDEX 



Summer spores of wheat, 262, 263* 

 Sundew, 410*, 411* 

 Sun plants, 470*, 471 

 Superior ovary, 130* 

 Supernumerary buds, 82* 

 Survival of the fittest, 498 

 Suspensor, 144, 145*, 335*, 336, 385, 



386* 



Swamp zonation, 476-478* 

 Swarm spores, 185*, 186, 204 

 Sweet pea, flowers of, 125* 

 Symbiosis, 255 



Symmetry, 123*, 125, 126*, 138* 

 Sympetalse, 397 

 Sympetalous, 126 

 Sympetaly, 395 

 Syncarpy, 395 

 Synergids, 383* 

 Synsepalous, 126 

 Synsepaly, 395 

 Systematic botany, definition of, 2 



Taper-pointed, App. I 

 Tap root, 23* 

 Taxonomy, definition of, 2 

 Teeth of moss spore case, 300* 

 Teleutospores, 260*, 261 

 Temperate plant associations, 482, 



483 



Temperature and germination, 7 

 Temperature and leaf movement, 97, 



98 

 Temperature and photosynthesis, 



108, 110 

 Temperature and respiration, 110- 



112 



Temperature and root absorption, 30 

 Temperature and root growth, 39 " 

 Temperature and transpiration, 120 

 Temperature and vegetation, 481- 



488 



Tendril,- 48*, 49 

 Tendril climbers, 48*, 92* 

 Terminal bud, 40*, 42*, 43*, 45*, 46*, 



52*, 82*, 83*, 84* 

 Terminal flowers, 132* 

 Tertiary root, 19 

 Testa, 5*, 6*, 370*, 375 

 Tetrad, 219, 277, 280* 289*, 369 

 Tetraspores, 219* 

 Thallophyta, 172-274* 

 Thallophytes, 172-274* 

 Thallophytes, summary of, 304, 305 

 Thallus, 172 

 Thistle, Russian, 440*, 447, 448 



Thorns, 416*, 417* 



Thorns as branches, 44* 



Tickle grass, 442* 



Timber line, 485* 



Tissue, 64, 167 



Toadstool, 265-267* 



Tooth fungi, 265* 



Toxins, 236 



Tracheids, 311, 312*, 366*, 367 



Transition from stamens to petals, 



139* 



Transpiration, 107, 116 

 Transpiration, amount of, 119, 120 

 Transportation by water, 441, 442 

 Tree ferns, 309, Plate VII 

 Trees, 46 

 Trees, age of, 46 

 Trichogyne, 216, 217* 

 Trimorphous flowers, 432 

 Tropaeolum, petiole, coiling of, 49* 

 Tropical plant associations, 481, 482*, 



Plate XIII 



Tropophytes, 459, 482 

 Truffles, 253 

 Truncate, App. I 

 Trunk, 42*, 43* 

 Tube nucleus, 372*, 373, 382* 

 Tuber, 52*, 53 

 Tuber brumale, 253 

 Tubercles on. roots, 234* 

 Tubular corolla, App. II 

 Tumbleweeds, 440*, 441*, 442* 

 Turgor, 118 

 Turnip seedling, 16* 

 Twayblade, beetle on flower of, 425* 

 Twigs, 40*, 46* 

 Twiners, 48*, 49*, 50 

 Twining, rate of, 50 



Ulothrix, 184-186* 



Ulva, 187 



Umbel, 133*, 135* 



Umbellet, 135*, 136 



Underground stems, 51*, 52*, 53*, 



54 78 79 ^-' 



Uneatable plants, 50*, 62, 416-419*. 

 Unilocular sporangia, 206* 

 Union of carpels, 128, 129* 

 Union of stamens, 127*, 128* 

 Unipistillary fruits, 146 

 Unisexual flowers, 124* 

 United States, plant geography of, 



489-495* 



Upright growth, 42* 

 Uredospores, 262*, 263* 



