INDEX 



417 



Epiphytic association, climax, 309 

 communities, 16, 73, 133, 372 



Equisetum, 251 



limosum, 344 

 Eragrostis pectinacea, 328 

 Eranthis, 290 

 Eremurus spectabilis, 329 

 Erica, 280 



arbor ea, 46, 376 



carnea, 44, 125, 330 

 -Juniper us type, 330 



cinerea, 280 

 district, 355 



multiflora facies, 316, 317 



scoparia-Lavandula stoechas assn., 376 



tetralix, 192 

 Ericaceae, 126, 127 



xeromorphy of, 132 

 Erigeron uniflorus, 70 

 Eriophorum vaginatum, 251 

 Erodium, 373 



glaucophyllum, 186 

 Erosion phenomena, 116, 117, 118 



slopes, 115 

 Eryngium maritimum, 67 

 Erysiphaceae, 46 

 Erythraea linarifolia, 205 

 Euchamaephyte seres, 336 

 Eucladium verticillatum, 184, 373 

 Eugeogenous rocks, 160 

 Eugeophytes, 290 

 Euhemicryptophytes, 291 

 Euphorbia beaumierana, 135, 296 



characias, 50, 275 



echinus, 296 



gouyoniana, 152 



nicaeensis, 190, 275 



par alias, 67, 153, 314 



resinifera, 296 



-Acaa'a gummifera scrub, 295 



seguieriana, 328 



serpens, 328 

 Euphorbias, cactoid, 135, 295 

 Euphrasia minima, 71 

 Europe, N.S. quotient map of, 258 



soil map of, 259 



vegetation map of, 356 

 Eustatic soils, 175 

 Eutassa intermedia, 190 

 Eutherophytes, 289 



Euthrophic waters, 76 

 Evaporating power of the air, 140 

 Evaporation, 137 



and exposure, 266 



curves, 138, 140, 141, 142 



in layered vegetation, 141 



in relation to succession, 140 



measurement of, 138 



precipitation ratio, 143 

 Evaporimeter, of Piche, 140 



open pan, 138 

 Exclusive species, 59 

 Exines, 337 

 Exposure, and epiphytes, 267 



and evaporation, 266, 267, 268 



and insolation, 264, 268 



and isotherms, 264 



and rainfall, 267 



and snow melting, 263 



and soil moisture, 266 



and soil temperature, 266, 266 



and tree limits, 263 



and vegetation, 263 

 Exposuremeter, 104 

 Expression of H ion concentration, 



166 

 Extra-regional units, 366 



Facies, definition of, 25 

 Factors, cUmatic, 83 



complex of, 82 



external, 22 



single, 82 



soil, 159, 207 

 Fagetum, 61, 63, 66, 170, 275, 300, 332, 

 350, 352, 369 



-hercynicum, 314 



silvaticae, 108, 323 

 Fagion, 324 



silvaticae, 324 

 Fagus, 101, 105, 275, 301, 339, 350 



cold limit of, 93 



grandifolia, 109, 141, 217, 369 

 -Acer assn., 217 



light requirement of, 101 



silvatica, 69, 108, 183, 352 

 {See also Beech) 

 Fauna, of soil, 233 



