INDEX 



797 



Sulphuric acid, assimilation of, 261 



Sunflower, Helianthus annuus 



Surirella, 391 



Suspensor, 565, 575 



Swarm spores, 196 



Sivertia, 689 



Symbiosis, 469 



Symmetry, 282, 306 ; dorsiventral, 75 ; 



planes of, 72 ; relations of, 72 

 Sympetalae, 684 

 Symphytum, 694 

 Sympodium, 127 

 Synandrae, 707 

 Syncarpous gynaeceum, 547 

 Synchytrium, 429 

 Synedra, 392 

 Syringa, 687, *687 



Tabernaemontana, 689 



Tactile pit, *353 



Taeniophyllum, *175 



Tamarindus, *666, *667, *668, 669, 670 



Tannin, 29, 268 



Tapetum, 500 



Taphrina, *449 



Tap-root, 140 



T:'.ritxaci(m, 712, 713, *714, 718 ; modi- 

 fications, *323 



Taxaceae, 593 



Taxodium, 596, *597, 606 



Taxus, *97, *593, *594, 602; embryo- 

 sac, *566 



Teak-tree, Tectona grand is 



Teazel, Dipsacus 



Tectona, 694 



Teleutospores, 455 



Telophase, 23 



Temperature, effect on development, 288 



Tendril climbers, 182 



Tendrils, *181, 182, 353 ; points of 

 reversal, 354 



Teratology, vegetable, 303 



Terfezia, 442 



Terfeziaceae, 442 



Terminal bud, 121 



Ternstroemiaceae, 647 



Tetracyclicae, 687 



Tetraspores, 423 



Teucrium, 695 



Thalictrum, 95 



Thallophyta, 367 ; phylogenetic connec- 

 tions of, 368 ; reproduction of, 369 ; 

 sexual reproduction, 198 



Thallus, 73 ; internal structure of, 78 



Thamnldium, 435 



Thea, *646 



Thecotheus, 439 



Thelephorea, 463 



Theobroma, *649, *650, 651 



Theory of descent, 1, 206, 326 



Thermonasty, 356 



Thesium, 191, 259, 620 



Thigmotropism, 353 



Thorn-apple, Datura Stramonium 



Thorns, 171 



Thuja, 596, 597 ; germination, *587 



Thyloses, 158 



Thymelaeaceae, 673 



Thymus, 696 



Tilia, *649 ; radial section of the wood 

 of, *157 ; tangential section of the 

 wood of, *156 ; transverse section 

 of the bast of, *159 ; transverse 

 section of a stem of, *154 : transverse 

 section of the wood of, *155 



Tiliaceae, 649 



Tillandsia, 185 



Tilletia, *454 



Tilletiaceae, 454 



Tilopteridaceae, 414 



Tissue-systems, 45 



Tissue tensions, 286, *287 



Tissues, boundary, 49 ; formation of, 40 ; 

 permanent, 47 



Tmesipteris, 527 



Tobacco, 697 



Tolypellopsis, 421 



Tone, alteration of, 345, 351 



Toothwort, Lathraea squamaria 



Topophototaxis, 330 



Torsion, 91 



Tozzia, 191, 259, 704 



Tracheae, 64, *65 ; annular, 65 ; reticu- 

 late, 65 ; spiral, 65 



Tracheides, 64, *65 ; annular, 65 ; reticu- 

 late, 65 ; scalariform, *66 ; spiral, 65 



Tradescantia, *14, 730 



Tragopogon, 716 



Transpiration, 228 ; cuticular, 230 ; 

 stomatal, 230 



Transpiration stream, 235 

 I Transverse geotropism, 342 



Trapa, 674 



Tree-ferns, 506 



Trees, 141 ; longevity of, 310 



Tremella, basidium, *452 



Tremellineae, 460 



Trentepohlia, 402 



Tribonema, 397 



Trichia, *383 



Trichobacteria, 371, 375 



TrichocauloH, 690 

 j Trichogyne, 424 



Tricholoma, 466 



Trichomanes, *510 



Tricoccae, 623 



Trifolwm, 672 ; movement, 337 



Trigonella, 672 



Triticum, 733, 734, *735 ; endosperm, *31 



Tropaeolum, chromoplasts, *20 



Tropisms, 338 



Tropophytes, 175 



