INDEX 



Abies, rapidity of growth in, 15. 



Abrin, action of, on algae, 261. 



Abscission, 216. 



- layer, 44. 



Abutilon, grafting of, 174. 



Accommodation, influence of, on cardinal 

 points, 70; non-heredity of, 195; to 

 extremes of temperature, 80; to poisons, 

 262, 263. 



Acer platanoides, temperature limits for 

 growth of, 76. 



Acetic acid, poisonous action of, 272. 



bacteria, temperature limits for growth 

 of, 76. 



Acids, influence of, on Mucor, 117 ; mode 

 of action of, 267, 268 ; use of, in com- 

 petition, 259. 



Actinosphaerium Eichhorni, centrosomes 

 in, 43- 



Adaptation to cold, 236. 



Adoxa, influence of light on, 89 ; light 

 on runners of, 93. 



Aecidium, galls due to, 171. 



Aerenchyma, 122. 



Aesculin, influence of, on zoospore forma- 

 tion, 1 1 8. 



Aesculus, influence of light on hypocotyl 

 of, 87 ; leaf-fall in, 217. 



Aethalium, influence of cold on, 238 ; A. 

 septicum, influence of change of con- 

 centration on, 257. 



Agave, strains in epidermis of, 65 ; A. 

 americana, contractile roots of, 14; 

 elasticity of fibres of, 55 ; influence of 

 slow thawing on, 235. 



Ahlfvengren, 106. 



Air-pressure, influence of, on formation of 

 sexual organs, 118; on growth of 

 trees, 125. 



Aitiomorphosis, 72, 137. 



Aitionomic, 137. 



Aitionomy, 149. 



Aitiotropism, 137. 



Albert, 206. 



Albicda moluccana, rapidity of growth of, 

 16. 



Albinism, transference of, by grafting, 174. 



Alcohol, influence of, on poisonous action, 

 274 ; maximal percentage of, for yeast, 

 259 ; resistance of seeds and spores to, 

 252 ; vitality of seeds in, 251. 



Algae, growth of, at low temperatures, 77 ; 

 in saturated KNO a solutions, 119; 

 influence of changes of concentration 



on, 119; chemical stimuli on, 118; 

 external conditions on life-cycles of, 

 198 ; light on, 90 ; temperature 

 on, 84 ; water-pressure on distribu- 

 tion of, 126, 127; periodicity in, 209; 

 reproduction of, 168 ; resistance of, to 

 desiccation, 255. 



Alkalies, mode of action of, 267, 268. 



Alkaloids, action of, 260, 268. 



A Ilium, intercalary growth in leaf of, 9. 



Alpine plants, causes of peculiar shape of, 

 100 ; early flowering of, 211. 



Alternation of generations, influence of 

 external conditions on, 198, 199. 



Amaryllis formosissima, dorsiventrality of, 



153- 



Ambronn, on limit of elasticity, 56. 

 Amelung, 39, 89, 91. 

 Amitosis, 148 ; production of, 43. 

 Ammonia, influence of, on nitrate bacteria, 



112. 



Amoebae, influence of freezing on, 241. 



Ampelopsis, influence of contact on tendrils 

 of, 129; transitory cold on, 210; 

 A. hederacea, influence of light on, 89 ; 

 inversion of, 159. 



Amphibious plants, shapes of leaves of, 

 120. 



Amygdalin, influence of, on zoospore forma- 

 tion, 118. 



Amygdalus communis, growth of, as ever- 

 green, 212. 



Anabiosis, 221. 



Anaerobes, accommodation of, to oxygen, 

 114; action of oxygen on, 259. 



Anaerobic bacteria, influence of oxygen on, 

 117. 



Ancylistes closterii, 17. 



Angelica archangelica, influence of desic- 

 cation on seeds of, 254. 



Aniline dyes, mode of action of, 268. 



Animals, comparison of, with plants, 4. 



Anisophylly, 154; influence of gravity on, 

 109. 



Anisotropic, definition of, 73. 



Anisotropy, influence of gravity on, 109. 



Anixiopsis stercorarius , limits of tempera- 

 ture for growth and formation of peri- 

 thecia in, 80. 



Annual rings, causes of, 215, 216. 



Antagonistic action, 269, 270. 



Anthrax bacilli, action of carbolic acid 

 on, 264 ; influence of salt solution on, 



T 2 



