INDEX 



283 



Haberlandt, 5, 9, 13, 47, 54, 55, 56, 57, 78, 

 80,84, 88, 101, 109, 168, 208, 215, 236; 

 on annual rings, 216 ; on cardinal tem- 

 peratures for growth, 76 ; on influence 

 of position of nucleus, 33 ; on mechan- 

 ical tissues, 54. 



Hacker, 43. 



Hammerle, 207. 



Haen, de, 106. 



Hakea brachyrhyncha, arrangement of scle- 

 renchyma in, 53. 



Hales, 7, 21, 66, 88 ; method of measuring 

 growth, 20. 



Hansen, 36, So, Si, 116, 117, 131, 167, 168, 

 196, 223 ; on cardinal temperatures for 

 growth, 76 ; on suppression of spore- 

 formation, 193; on resting period of 

 sclerotia, 208. 



Haptera, 129. 



Haptomorphism, 132. 



Haptotropism, 132. 



Hardy, 233. 



Harnier, 213. 



Hartig, 7, 9, 13, 16, 67, 90, 93, 113, 166, 

 215, 223, 224; on causes of annual 

 rings, 216. 



Harting, 6, 34. 



Hartung, 213. 



Harvest, amount of, per acre, 16. 



Heald, 92, 99, 102, 167, 260, 273 ; on ger- 

 mination of fern-spores in darkness, 80. 



Heat, moist, resistance of plants to, 228 ; 

 dry, 229 ; influence of poisons on pro- 

 duction of, 264. 



Heat-rigor, 69, 225. 



Heckel, 113. 



Hedera helix, dorsiventrality of, 1 54 ; influ- 

 ence of light on root-formation of, 93 ; 

 inversion of, 159. 



Heer, 204, 206. 



Hegler, 148 ; on influence of tension on 

 growth, 127. 



Heider, 262. 



Heim, 91, 169. 



Heinrich, 231. 



Heinricher, 93, 114, 157, 167, 255. 



Helianthus, grafting of, 175; influence of 

 tension on strength of, 127 ; on force of 

 expansion in pith of, 64 ; strains in 

 stem of, 61 ; H. annuus, rate of growth 

 of, 16 ; H. titberosus, longitudinal strains 

 in, 62 ; periodicity in, 203. 



Heliotropism, definition of, 73. 



Helleborus foetidus, resistance of, to cold, 

 232 ; H. niger, early flowering of, 79 ; 

 influence of frequent thawing on, 235 ; 

 tension on breaking strain of, 127 ; 



on mechanical tissues of, 54 ; H. 



viridis, sclerenchyma in, 128. 



Hemerocallisful-ua, dorsiventrality of, 153. 



Henneberg, 117; on cardinal temperatures 

 for growth, 76. 



Henry, 162. 



Hepaticae, embryonic character of, 167 ; 

 growth of spore membranes of, 30 ; 

 induction of dorsiventrality in, 150; 

 regeneration of, 169. 



Heracleum giganteuin, rate of growth of, 

 1 6. 



Herbst, 74, 132, 163. 



Heredity, 189; definition of, 191. 



Hering, 161, 163; on correlation, 162. 



Hermann, 107, 220. 



Hertwig, 40,41,42, 43, 72, 81, 86, 116, 127, 

 148, 155, 158, 1 66, 167, 178, 194. 



Heterantherei) influence of desiccation on 

 seeds of, 210. 



Heterauxesis, 74. 



Heterocentron diversifoliuni, influence of 

 gravity on, 109. 



Heteromorphosis, 72, 167. 



Heyer, 199. 



Hieracium, influence of light on, 89. 



Hilbrig, 79 ; on maximal temperatures, 225. 



Hildebrand, 67, 153, 162, 197, 254. 



Hirsch, 10. 



Hohnel, 229. 



Hermann, 184. 



Hoffmann, 40, 92, 238, 252, 253. 



Hofmeister, 3, 4, 7, 9, 10, 12, 18, 32, 46, 58, 

 63, 65, 67, 164, 168, 177, 192, 219, 

 224 ; on growth of Spirogyra, 19; on 

 influence of gravity, 109 ; - - pressure 

 in bud, 144 ; on mechanics of tissues, 

 59; on planes of division, 42 ; on tissue- 

 strains, 64. 



Hohnel, 217. 



Holl, 73. 



Holtermann, 90, 94. 



Hoppe-Seyler, 77 ; on surface temperature 

 in streamlets, 78. 



Hop-stems, influence of darkness on, 87. 



Hordeum^ 19. 



Horizontal microscope, 20, Fig. 6. 



Horvath, 131. 



Hot stages, 83. 



Huber, 208. 



Hiilscher, 13. 



Huie, on karyokinesis in Drosera, 43. 



Humboldt, von, 107, 213. 



Humulus, elongation of internode of, 5 ; 

 growth-coefficient of, 16 ; rapidity of 

 growth of, 15. 



Hunter, 239. 



Huth, 263. 



Hyacinihus, influence of desiccation on, 

 210 ; strains in epidermis of, 65. 



Hybrid, definition of, 175. 



Hybrids, reversion of, 189. 



Hydra viridis, green cells of, 171. 



Hydrocharis, influence of soil on growth 

 of roots of, 122. 



Hydrodictyon, condition for zoospore for- 

 mation in, ilS; grouping ofzoospores 

 of, 177. 



Hydrogen, action of, 261. 



