408 



PLANT SOCIOLOGY 



Alectorietum chalybeiformis, 241 

 Algal associations, 188 

 filaments, 242 

 zonation of, 346 

 communities, epilithic and endolithic, 

 188 

 pioneer saline, 198 

 submersed, 371 

 AlkaU, black, 204 



white, 204 

 Alkalinity not proportional to lime, 

 182 

 specific, 167 

 Alkaloids, formation influenced by 



light, 99 

 Allenrolfea occidentalis, 199, 202 

 Alhance, 363 



definition of, 364 

 Allium ursinum, 49, 91 

 Allochthonous pollen, 338 

 Alnus, 105, 236, 239, 338, 339 

 glutinosa, 226 



forest, 108, 332 

 incana, 17, 210, 226 

 viridis, 35, 146, 263, 348 

 Alpine cUmate, 261 



climax vegetation, 270, 313 

 gravel associations, 319, 320 

 humus, 251 



soils, 163, 257 

 meadows, 264, 347 

 plant communities, 262 

 soils, buffering of, 177 



humus content of, 246 

 wind communities, 156 

 Alps moulder, 251 

 Alter naria, 236 



Alternation of plant communities, 155 

 Altitude, 261 



and temperature changes, 261 

 influence on germination, 262 

 Altitudinal sub-associations, 344 

 variations of associations, 344 

 zones, 347 



and climax communities, 348 

 Alyssum montanum, 186, 187 



spinosum, 293, 373 

 Amaranthus, 289, 373 

 Ammonification, 237 



Ammophila arenaria, 59, 61, 67, 152, 

 169, 373 



-Medicago marina assn., 152, 153, 

 373 

 AmmophiletaUa, 373 

 Ammophiletum, 61, 67, 209 

 Ammophilion, 319, 364, 371, 373 

 Anabasis, 201, 293 



aphylla assn., 202 



aretioides, 293 



salsa assn., 202 

 Anabolism, 101 

 Analysis of communities, methods of, 



28 

 Anastatic soils, 175 



species, 193 

 Andropogon furcatus, 282 



laniger, 149 



prairie, 142 



scoparius, 282 

 Androsace, 234, 293 



alpina, 310 



carnea, 63 



helvetica, 148, 187, 300 



obtusifolia, 72 

 Androsacetalia multiflorae, 373 

 Androsacion alpinae, 121 



multiflorae, 110 

 Andryaletum mogadorensis, 353 

 Anemone, 102 



montana, 343 



7ie7norosa, 47, 69, 91, 239, 290 



Pulsatilla, 66, 343 



vernalis, 71 

 Angraecum funale, 296 

 Animal life of the soil, 233 



resting place communities, 277 

 Animals, communal relationships of, 



5 

 Ankistrodesmus nivalis, 289 



tatrae, 289 

 Anomodon viticulosus, 373 

 Antagonism of Ca ions, 195 



of ions, 179, 180 

 Antennaria carpatica, 71 

 Anthelia juratzkana, 122 



nivalis assn., 121 

 Anthirrhinion asarinae, 373 

 Anthoceretum, 209 



