438 



PLANT SOCIOLOGY 



Vegetation, analysis of, 27 



and soil dispersion, 209 



dynamics of, 305 



history of, 336 



map of Europe, 356 



of sodium chloride soils, 195, 198 



of sulphate soils, 201 



record, example of, 68 



structure of, 81 



territories, 353 



units of, 22 



zones, concentric, 345, 346 

 Vegetational development, 305 



regions, 366 



bounding of, 354 



zones, of Grisebach, 354 

 Vella pseudo-cytisus, 186 

 Veratrum album, 37 

 Vernal aspect, 48, 49, 51 

 Veronica alpina, 123, 261, 310 



aphylla, 71 



bellidioides, 72 



chamaedrys, 69 



officinalis, 69, 292 

 Verrucaria caldseda community, 184 



maura, 347 

 Viburnum alnifolium, 333, 334 



tinus, 90, 129, 130 

 Vicarious forms, 160 

 Vicia, 289, 292 



cracca, 192 



gracilis, 60 



tetrasperma, 64 

 Vinca, 50 



Vincetoxicum officinale, 182, 183 

 Viola, 102, 291 



calaminaria, 191 



cenisia, 44, 59 



lutea, 191 



silvestris, 69 



tricolor, 37, 297 

 var. marilima, 67 

 Violetum calaminariac, 63 

 Virgin forests, 278, 284 



soil, 310 

 Viscaria alpina, 70 

 Viscum, 296 

 Vitality, 26, 44 



degrees of, 46 



Vitality, reduced, 46 

 Vitis vinifera, 180 



W 



Water, 111 



capacity of soil, 213 



economy, 126 



stomata, 127 



table, influence of, 64 

 Weathering, mineral, 254 



of rocks, biogenic, 242 

 Weighing, of vegetation, 33 

 White alkaU, 204 

 Willow scrub, 350 

 Wilting, 132 



coefficient, 212, 215, 217 

 Wilted plants, transpiration of, 132 

 Wind, 145 



and forest Umits, 157 



and plant communities, 154 



and snow cover, 149 



communities, 157 



erosion, 140, 150, 151 



forests bounded by, 158 



forms of plants, 146, 147, 148, 149 



-induced timber lines, 158 



mechanical effects of, 146 



physiological effects of, 154 



pressure, 148 

 injury by, 147 



protection from, 7 



resistance of plants, 154 



sandblast effect of, 151 



velocity, 145 

 Winter wheat, 43 



synusiae, 302 

 Wiirm glaciation, 314 



Xanthium macrocarpum, 16 

 Xanthoria fallax, 241 

 Xanthorion, 371 

 Xatarlia scabra, 63 



Xerobrometum, 59-62, 66, 68 114. 

 142, 318, 343, 344 

 erecti, 114 

 Xerohalophytic habitats, 202 



