350 



INDEX 



Senescence, 300, 301, 302 

 Sensory organs and zones, 8 

 Sensory zones in Mimosa, 15 



zones in tendrils, 23 

 of roots, 78, 79 

 of shoots, 82 



Shock, mechanical effects of, 11-38 

 Sicyos, tendrils of, 22 

 Smith, on contact irritability, 305 

 Sodium, uses of in plants, 217 

 Sohxlet extraction apparatus, 150 

 Solarium, grafts of, 223 



propagation of, 317, 318 



storage substances in, 243 



translocation in, 241 

 Sorauer, on callus formation, 38 

 Spectrum, influence of portions of on pho- 

 tosynthesis, 234, 235 

 Spirogyra, growth of, 280, 281 



effects of chemicals on, 48, 50, 55, 

 56 



permeability of membranes of, 180 



plasmolysis of, 180 



senescence of, 301 



starvation of, 48 

 Stahl, on significance of mycorhizas, 



248 

 Starch, digestion of, 267, 268 



reactions of, 157, 158 

 Starvation, 48 

 Stemonitis, hydrotropism of, 68 



effect of mechanical shock upon 



plasmodium of, 10 

 Sterns, on brood-bodies of Lycopodium, 



315 



Sticta, 248 

 Stimuli, 4 



accommodation to, 17, 20, 24 

 repetition of, 17, 24 

 summation of, 135 

 Stipa avicennacea, hygroscopic movements 



of awns of, 178, 179, 199 

 Stirling, text-book of physiology, 157 

 Stomata, structure and action of, 196- 



203 

 Stone, on botanical apparatus, 287 



on influence of electricity upon plants, 



101 

 on method of measurement of growth 



of roots, 283 



Storage of reserve food, 241, 242, 243 

 organs, formation of, 243 

 substances, determination of, 243 



in fruits, 296 

 Strasburger, on division of nucleus, 277, 



279, 281 

 on termination of vessels in leaf, 241 



Streaming movements in cells, influence 

 of ammonia on, 47 



chloroform on, 47 



desiccation on, 66 



ether on, 49 



shock on, II, 12 



temperature on, 93, 94 

 Stretching, effects of, 30, 31 

 Sugars, determination of, 152-157 

 Sugar-beet, 242 

 Sugar-cane, 228, 242 

 Sulphur, origin of supply, 218 

 Sunflower, transpiration of, 204, 206 



See Helianthus 

 Syringa, length of air passages in, 194, 



195 



lenticels of, 192, 193 



propagation by roots, 316 

 Synthesis of proteids, 239 

 Syrrhopodon scaber, gemmae of, 311 



Tannins, extraction and estimation, 150- 



152 



Taraxacum, epinasty, and hyponasty in, 



306 



irritable properties of leaves, 138 

 tensions in, 183 

 Taxus, permeability of wood to air, 195, 



196 



critical points in, 89, 90 

 Temperature, endured by plants, 90 

 formative effects of, 96, 97 

 influence on geotropic reactions, 77 

 movements of protoplasm, 93, 94 

 respiration, 251, 252, 259, 260 

 relations to protoplasm, 89 

 stimulating influence of, 91, 92 

 Tendrils, structure and action of, 22, 23, 



24, 25, 26, 27, 30, 31, 36, 100 

 Tensions, of fluids in body, 185, 186, 



187, 1 88 

 of tissues, 183 

 longitudinal in stems, 183 

 Tentacles of Drosera, 28 

 Tetanus, 17, 23 



Tetanized condition of tendril, 23 

 Tetraphis, gemmae of, 311 

 Thermal constants, 96, 97 

 Thermograph, 289 

 Thermotonus, 5 



Thiselton-Dyer, on freezing of seeds, 90 

 Tilia, movements of branches, 97 

 Tittmann, on callus formations, 37 

 Tobacco, curing and fermentation, 274 



mosaic disease of, 274, 275 

 Tourney, on sensitive stamens of Opuntia, 

 19 



