406 
Streblonema, 337 
Strelitzia, 360 
Streptococcus, 331 
Striariaceae, 337 
Strigulaceae, 343 
Strobilophyta, 277, 355. 
Strobilus, 273 
Struvea, 336 
Strychnine, 150 
Stuartia, 363 
Style, 292 
Stylidiaceae, 373 
Styracaceae, 366 
Stysanus, 348 
Sub-classes, 160 
-families, 160 
-orders, 160 
Suberin, 155 
Succinic acid, 141 
Sugar, 145 
Sugars, 17 
Sulphur-bacteria, 169 
Sulphuric Acid, 139 
Sumachs, 372 
Summary of Anthophyta, 315 
Sunflower, 311 
Sunflowers, 375 
Sun plants, 320 
Super-orders, 160, 361, 365, 366, 
368, 373 
Supply of energy, 91 
Supporting System, 64 
Surirellaceae, 334 
Survival of the fittest, 113 
Susceptibility to diseases, 137 
Sweet Pea, 314 
Symbiosis, 216 
Symphoricarpos, 315 
Symplocaceae, 366 
Symplocarpus, 358 
Synapsis, 111 
Syncephalis, 335 
Synchytriaceae, 172, 332 
Synchytrium, 332 
Synergids, 287 
Syringa, 366 
¢ 
Tabellariaceae, 334 
Taccaceae, 360 
Tamaricaceae, 364 
INDEX 
Tanacetone, 144 
Tannin, 141 
Tansy oil, 144 
Taphrina, 341 
Taraxacum, 312, 377 
Tassel, 300 
Taxaceae, 357 
Taxales, 282, 356 
Taxin, 150 
Taxodiaceae, 278, 356 
Taxodium, 278, 356 
Taxodiums, 278, 356 
Taxus, 282, 357 
Tecoma, 367 
Tectona, 367° 
Teliosporeae, 213, 232, 346 
Teliospores, 232 
Temperature, 95 
Terfezia, 344 
Terfeziaceae, 344 
Tetrasaccharids, 146 
Tetraspora, 332 
Tetraspores, 206 
Thea, 363 
Theaceae, 363 _ 
Theine, 149 
Thelephora, 346 
Thelephoraceae, 230, 346 
Thelidium, 342 
Thelocarpon, 340 
Theloschistaceae, 340 
Theloschistes, 216, 340 
Thelotremataceae, 340 
Theobromine, 149 
Theophrastaceae, 365 
Thigmotropism, 127 
Thiobacteria, 331 
Thistle, 324, 376 
Thoreaceae, 338 
Thorns, 319 
Thread Lichen, 216 
Thuidium, 351 
Thurniaceae, 358 
Thuya, 356 
Thuyas, 282, 356 
Thuyopsidaceae, 282, 356 
Thymelaeaceae, 371 
Thymus, 367 
Tilia, 362 
Tiliaceae, 362 
Tillandsia, 360 
