SUBJECT INDEX 



Adult leaf forms, 154, 184, 445 sqq. 

 Aerotropism of roots, 23 ; of pollen 



tubes, 352 

 After-ripening, 423 

 Allogamy, 355 



Alpine plants, assimilation of, 157 

 Alternation of generations, 315 sqq. 

 Anemophily, 354, 375 

 Anisophylly, 118 

 Annual plants, 447 sqj., 451 

 Ants and plants, 309 

 Apogamy, 327 

 Aquatic plants, absorption of salts by, 



70 ; dehiscence of stamens of, 



343; gas exchange of, no; 



mechanical features of, 293 ; 



pollen of, 345, 379 ; root 



systems of, 36 ; transpiration 



current of, 201 ; youth and 



adult leaves of, 446 

 Arid regions, bulbous plants of, 186 ; 



evergreen trees of, 449 ; 



forests of, 187, 193, 449 

 Aril, 400 



Ash content of leaves, 208 

 Atmometer, 164 

 Autogamy, 355 

 Assimilation, 78 sqq. 



in diffuse light, 130 ; in nature, 



147 



of alpine plants, 157 ; of aurea 

 leaves, 138 ; of autumn 

 leaves, 138 ; of insectivorous 

 plants, 281 ; of parasites, 

 220, 225 ; of seedlings, 136 ; 

 of shade plants, 151, 158 ; of 

 shade and sun leaves, 15s ; 

 of steppe plants, 215 ; of 

 tropical plants, 158 ; of 

 young leaves, 136 



energy relations of, 113, 114; 

 materials of, 81 ; maximum 

 mtensity of, 149 ; process of, 

 79 ; significance of, 79 



Assimilation — cont. 



and carbon dioxide supply, 143, 

 146, 149 ; and amount of 

 chlorophyll, 135 ; and ex- 

 ternal conditions, 139 ; and 

 light supply, 143, 146, 150, 

 151, 158 ; and light quality, 

 129 ; and light quality in 

 nature, 130 ; and nutrient 

 salts, 147 ; and temperature, 

 141 sqq., 150, 158 ; and 

 transpiration, 215 ; and water 

 supply, 140 ; and wilting, 

 141, 163 



dark stage, 137 ; light stage, 

 137 ; numbers, 133 



Bacteria, symbiotic, specialisation 

 of, 262 



Balanced solutions, 64 



Bicarbonates and carbon dioxide 

 supply, 112 



Bladders of Genlisea, 280 ; of 

 Utricularia, 277 sqq. 



Branches, mechanical features of, 

 291 



Broad-leaved trees, stoma tal move- 

 ment of, 172 



Buds, enzymes of, 456 ; formation 

 and dormancy of, 452 sqq. 



Carbon dioxide, in atmosphere, 149 ; 



in water, in ; in woods, 152 

 supply of, to land plants, 81 ; 



supply of, to submerged 



plants, 201 

 narcosis, 399, 421, 431 

 Caruncle, 400 



Cereals, stomatal movements of, 170 

 Chamasphytes, 451 

 Chemotropism of pollen tubes, 352 

 Chiropterophily, 375 



S16 



