294 



INDEX 



Tendrils, influence of strains on thickening 

 of, 54 ; sense of touch of, 129. 



Tension, action of, on growth, 127 ; of cell- 

 wall, influence of, on rigidity, 59 ; 

 influence of, on growth, 30, 31. 



Teodoresco, 87, 88, 89, loo, 102, 103, 105, 

 118. 



Ternetz, 90, 116, 121, 123. 



Tharantder, 216. 



Thawing, influence of, 234, 235. 



Thennophile bacteria, influence of oxygen 

 on minimal temperatures for, 80 ; 

 temperature limits for growth of, 76. 



organisms, 76, 77 ; distribution of, 79 ; 

 importance of, 78. 



Thermotonus, 69. 



Thiele, 84 ; on cardinal temperatures for 

 growth, 76 ; on influence of food on 

 cardinal temperatures, 80. 



Thigmomorphic, 132. 



Thigmotropic, 132. 



Thiselton Dyer, 237. 



Thomas, 88. 



Thuja, induction of dorsiventrality in, 

 151. 



Thuret, 258. 



Tietz, 80, 84 ; on cardinal temperatures for 

 growth, 76. 



Tilia europea, periodicity in, 206. 



Tissue-strains, 61 ; development and altera- 

 tions of, 65 ; history of, 64 ; influence 

 of etiolation on, 88 ; external con- 

 ditions on, 66, 67. 



Tissues, embryonic, distribution of, 4 ; 

 growth of, when isolated, 66 ; symmetry 



of, 47, 48. 



Tittmann, 14, 158, 167, 169; on callus-for- 

 mation, 132. 



Tjibodas, growth of trees at, 212-4. 



Tladiantha dubia, influence of gravity on, 

 109. 



Tobacco, spot-disease of, 174. 



Tolomei, on influence of magnetism on ger- 

 mination, 107. 



Tone, importance of, 69. 



Touch, sense of, in plants, 121. 



Tournefortia hirsutissiina, minimal tem- 

 perature for, 233. 



Townsend, 40, 113, 145, 146, 186; on con- 

 duction of stimuli, 183 ; on influence of 

 injuries on growth, 134, 135 ; on proto- 

 plasmic threads, 33. 



Tox-albumins, action of, on algae, 261 ; 

 mode of action of, 268. 



Toxins, destruction of, by cold, 239. 

 Tradescantia, action of light on, 248, 249 ; 

 freezing of, 241 ; regeneration of epi- 

 dermis of, 169; T. discolor, minimal 

 temperature for, 233. 

 Trambusti, on accommodation, 262. 

 Transpiration, influence of, on annual rings, 

 216; -- on etiolation, 100; --on leaf- 

 fall, 218; -- on spore-formation, 123. 



Transversals, 48. 



Trapa natans, resting period of seeds of, 



207. 

 Traumatic effects on growth, 133; on 



shape, 134. 

 Trees, diurnal changes of volume of, 66. 

 Treub, 173. 



Treviranus, 107, 129, 161, 263. 

 Trianea bogotensis, position of nucleus in 



root-hairs of, 33. 

 Trichites, 35. 

 Trifolium alpinum, resistance of, to cold, 



234- 



Triticum, elongation of filaments of, 17; 

 T. vulgare, influence of temperature 

 on growth of, 77 ; temperature limits 

 for growth of, 76. 



Tropaeohim, development of flower of, in 

 darkness, 91 ; influence of light on 

 hypocotyl of, 87 ; T. majus, influence 

 of ultra-violet rays on, 103. 



Trophic, definition of, 73, 74. 



True, 79, 118, 257. 



- and Hunkel, 271, 273. 



Tschirch, 260, 261, 263. 



Tschoudy, on grafting, 176. 



Tsilinsky, 84 ; on accommodation to high 

 temperatures, 80 ; on bacteria in hot 

 springs, 77. 



Tubers, effect of suppression of, 163 ; influ- 

 ence of, on formation of flowers, 164; 

 periodicity of growth of, 204 ; produc- 

 tion of, on aerial shoots, 162 ; regula- 

 tion of depth of, 14. 



Tulifia, influence of desiccation on, 210; 

 intercalary growth in leaf of, 9 ; leaves 

 of, 13. 



Turgidity, influence of, on growth, 29, IlS; 

 - on rigidity, 51, 58. 



Turgor, influence of air-pressure on, 115; 

 - on elasticity and cohesion, 57 ; 

 stretching of cell-wall by, 60. 



Tussilago Farfara.) early flowering of, 79. 



Twigs, abscission of, 217. 



Tyloses, 28, 45; formation of, 134. 



Typhus bacilli, influence of salt solution on, 

 2 5 8. 



Uhlitzsch, 10. 



Uloth, 83 ; on cardinal temperatures for 



growth, 76. 

 Ulotlirix zonata, cause of resting period 



of, 212; resistance of, to cold, 236; 



temperature limits for growth of, 76. 

 Ultra-maximum, 220. 



Umbelliferae, origin of hollow stems of, 34. 

 U?tcaria, tensile strength of stem of, 50. 

 Urtica urens, resistance of, to cold, 232. 

 Usnea barbata, stretching of hyphae of, 



Ustilagineae, vitality of spores of, 255. 

 Ustilago carbo, influence of light on, 247, 



249- 



