454 



INDEX 



Tapetum, of Angiosperms, 360 

 (fig.), 361, 363 (fig.) ; of Ferns, 

 297. 2 99 (fig.). 



Tapioca, 43. 



Taraxacum, 154, 170, 372 ; flowers 

 of, Plate I (Frontispiece). 



Tartaric acid, 60. 



Taxus baccata, 128, 334 ; female 

 cones of, 346 (fig.) ; habit of, 

 335. 34^ (fig.) ; leaf-structure 

 of, 341, 342 (fig.) ; male cones 

 of, 344, 345, 346 (fig.) ; ovules 

 of, 346 ; seeds of, 346 (fig.), 

 351 ; stem of, 339. 



Taxus baccata, var. fastigiala, 380. 



Tea (Thea sinensis], 61, 63. 



Teak (Tectona grandis}, 126, 130. 



Tearing, protection against, 93, 115. 



Tectona grandis, 126, 130. 



Teleutospores, 246 (fig.), 248. 



Tension, resistance to, 72, 88, 170. 



Terpenes, 62, 63. 



Terrestrial Algae, 190, 198, 204, 205, 

 208. 



Tertiary fossil-plants, 356. 



Testa, 352 (fig.), 370, 371 (fig.). 



Tetrads, of pollen grains, 361, 362 

 (fig.) ; of spores, 307 (fig.), 318 

 (fig-), 319, 348, 365, 372. 



Tetrahedral apical cells, 18 (fig.), 

 288, 297. 



Tetrarch roots, 66 (fig.), 69, 131 



(fig-)- 



Tetraspora, 190, 191 (fig.). 

 Tetraspores of Red Algae, 205 (fig.), 



228. 



Textiles, 34, 103. 



Thalictrum, stem-structure of, 86. 

 Thallophyta, 180-268 (figs.), 307, 



406. See Algae and Fungi. 

 Thallus of, Algae, 180, 195-207 



(figs.), 225 (fig.) ; Fungi, 230, 



231 ; Lichens, 258-61 (figs.) ; 



Liverworts, 269-73 (figs.). 

 Theobroma cacao, 49. 

 Theobromine, 61. 

 Thermophilic Bacteria, 261. 

 Thickening of cell-walls, 29-37 



(figs.) ; annular, 35 (fig.), 36 ; 



reticulate, 35 (fig.), 36, 74, 83 



(fig.), 120, 273 ; spiral, 35 



(fig.), 36, 37 (fig-), 74, 80 (fig.), 



83 (fig.), 120. 

 Thistle, 102. 

 Thornapple (Datura stramonium), 



61, 62 (fig.), 384. 

 Thread-Bacteria, 268. 

 Thuidium, 276. 



Thuja, 347, 350; habit of, 336, 337 



(fig-)- 



Tilia, secondary phloem of, 130 ; 

 secondary wood of, 28, 120, 

 127. 



Tiliaceae, 103. 



Timber, 127-30 ; commercial 

 sources of, 129, 130, 162, 334, 

 337 ; " Dry Rot " of (Merulius 

 lacrymans], 252. 



Tissues, i, 27, 65 ; epidermal, 91- 

 106 (figs.) ; false, 239 ; glan- 

 dular, .148, 149; ground, 65, 

 88, 107-11 ; mechanical, 31-6 

 (figs.) ; meristematic, 18, 117, 

 135 ; secondary, 120-42 (figs;) ; 

 secretory, 151-5 (figs.) ; storage, 

 88, 132 ; vascular, 67-70 

 (figs.), 78-86 (figs.), IT2, 113. 



Tissue-tensions, 12, 87. 



Tmesipteris, 407. 



Toadstools, 230, 245, 255, 407. 



Tobacco (Nicotiana tabacum), 61, 

 265. 



Tolypothrix, 205, 206 (fig.). 



Tomato (Solanum lycopersicum], 



63- 

 Tooth wort (Lathresa), hydathodes 



of, 145 (fig-)- 

 Tortula, 274 ; T. muralis, 269, 274 



(fig-)- 

 Torus (of bordered pits), 36, 37, 



34 ! (fig.)- 

 Toxic effect, of Bacteria, 265 ; 



of mineral salts, 14, 15. 

 Tracheidal cells (of Conifers), 341 



(fig-). 

 Tracheids, 37 (fig.), 179 ; of Conifers, 



37 (fig-), J 27, 340, 34 1 (fig-). 

 344 ; of Ferns, 293 (fig.), 296, 

 298 (fig.) ; of foliage-leaves, 37 

 (fig.), 113, 146; of secondary 

 wood of Dicotyledons, 120, 

 121, 134. 

 Tradescantia, cell -structure of, 4, 5 



(fig.). 

 Tragopogon, root-structure of, 44, 



132, 154, 155 (fig-). 

 Transfusion tissue, 342 (fig.), 343, 



344 (fig-)- 

 Transition from stem to root, 89 



(fig-). 

 Transitory starch, 6 (fig.), 40, 41, 



42 (fig.), 46. 



Transmission of acquired charac- 

 ters, 380. 



Transpiration, 35, 158, 203 ; and 

 anthocyanins, 63 ; and hyda- 



