INDEX 



383 



Squash, variation in fruits of, 209 

 Stalk-ccll, of pollen, 347, 3.52 

 StaincMi, 185 

 Staminate cone, 352 

 Starch, 120 



formation of, from glucose, 73 

 grains, 120 

 Stearin, 121 

 Stem, 20, 88-112, 325 



external structure of, 88-93 

 herbaceous, 101, 103 

 internal structure of, 94-105 

 surface of, 91 

 woody, 101, 102 

 Sterigma, 296 

 Sterilization, of sporophytic tissue, 



316 

 Stigma, 185, 347, 360 

 Stimulus, 155 

 Stipe, 279, 299 

 Stock, 151 

 Stolon, 183, 184 



of Rhizopus, 289 

 Stoma, 65, 66 

 Stonecrop, flower of, 189 

 Strawberry, asexual reproduction of, 



183 

 Striations, of starch grains, 120 

 Strobilus, 335, 336 

 Struggle for existence, 236, 237 

 Style, 185 

 Substratum, 285 

 Sucrose, 119 

 Sugars, 119 



digestion of, 123 

 fermentation of, 131 

 Sulphur, importance of, 31 

 Sundew, 173 



Survival of the fittest, 236, 237 

 Suspensors, of Mucorales, 290 

 Swamp association, 170 

 Sweet gum, twig of, 102 

 Sycamore, twig of, 102 

 Symbiosis, 175, 303 

 Sympetalae, 362, 364 

 Symplocarpus, 365 

 Synergids, 360 

 Synthesis, of carbohydrates, 73 



Synthesis, of proteins, 122 

 Syringa, 98 

 Systematic botany, 2 



T 



Tangential section of wood, 106, 107 

 Tap-root, 19, 41 

 Taraxacum, pollen of, 186 



variation in, 210 

 Taxonomy, 2 

 Teleutospore, 297, 298 

 Telophase, of mitosis, 140 

 Temperature, as environmental fac- 

 tor, 156 

 maximum, 157 



minimum, 157 



optimum, 157 



of plant body, 157 

 Terminal growing-point, 143, 144 

 Tetrads, of spores, 313 

 Tetraspore, 283, 284 

 Tetrasporic plant, 283, 284 

 Thallophyta, 11, 264-305 

 Thallus, 264 

 Theophrastus, 4 

 Tissue, 19, 246 

 Toadflax, flower of, 191 

 Tobacco, flower of, 190 



mutation in, 222 

 Tolerance, of shade, 161 

 Tooth fungi, 302 

 Toxin, 288 



Tracheal cell, 100, 101 

 Tracheid, 100, 101, 350 



in vein, 68 

 Translocation, of food, 112 

 Transpiration, 19, 74-78 



as cooling process, 77 



rate of, 75 



significance of, 77 



stream, 77 

 Transverse section of wood, 106, 107 

 Tree, 88, 91 

 Trichogyne, 283, 284 

 Trillium, flower of, 186 

 Trophophyte, 168 



