SUBJECT INDEX 



387 



Cytioglossiim officitwlc, 169, 174, 178-180 



Stomatal aperture, 179, 185 



transpiration, 179, 184, 186 



Czechoslovakia, psammophytes, 190- 

 198 



Dakar, dew collectors, 46 



Deep percolation of water in the soil, 12 



Denmark, spruce growth in Jutland, 



142-152 

 Derbyshire, 289, 290, 307, 310 

 Desert chamaephytes, 206-221 

 Desert plants, 199-205, 206-221 

 Desert:., rainfall and run-off, 204 

 Dcschampsiafiexuosa, 315, 320 

 Dew, 25, 34, 37-54 



absorption by plants, 53-54, 367 



on grass, 41 



in relation to photosynthesis, 54 



on sugar-beet, 41 



on wheat, 41 



Dew^ collectors, 45 

 Dewfall, definition, 47 

 Dew gauges, 37, 42-44 

 Dew-point, 37 

 Diffusion cell, 59-63 

 Diffusion pressure deficit, 51 

 Distillation, definition, 47 

 Dolichoblast, 208-219 

 Douala, 7 



climatic diagram, 5 



Drought damage to oak, 152 

 Drought injury to spruce, 143, 144, 145 

 Drought resistance, 57, 302-308 

 Drought stress, 165 



Eddy diffusivity, 21, 28, 31 

 Enchytraeid worms, movements in 



relation to potential water surplus 



and deficit, 17 

 Endive, 253 



growth and radiation, 250 



water use and growth, 251 



Endymion, 315 

 England, dew, 43, 50 



potential water deficit, 1 5 



Epipactis paliistris, 182 



Erica caniea, osmotic values, 159 



Eucalyptus, forest, 200-201 

 Eucalyptus astriugeus, 201 



diversicolor, 201 



— — inarginata, 201 



redunca, 201 



Euphorbia cornuta, root penetration, 204 

 Europe, water balance regions, 16 

 Evaporation, 6, 12, 19-35, 37 



in Alps, 157 



measurement, 1 70 



in oats, 29 



in relation to radiation, 247, 248, 



254 



at Straznice-Pfivoz, 192 



Evapo-transpiration, 3, 10, 11, 12, 16, 147 



measurements, lo-ii 



Exposure and plant growth, 235-244 



Fagonia arabica, root penetration, 204 

 Fagus grandifoUa, distribution in Ontario 



and U.S.A., 367 

 Farsetia callosa, root penetration, 204 

 Festuca dominii, stomatal closure, 196 

 transpiration, 190-191, 192- 



193, 195 

 Festuca domitiii, water content, 192-193 

 Fcstucetum halleri, distribution in re- 

 lation to snow cover in Alps, 160 

 Field-balance (Morris's), 25, 26, 41 

 Filipendula ulmaria, 182 



transpiration, 183 



Filipendula vulgaris, 289 



drought resistance, 302-308 



growth, 290-296, 297, 310 



transpiration, 296-302, 309 



Finland, crop failure of pine and 



spruce, 372 

 Fir, resistance to flooding, 371 

 Fitzroya cupressoidcs, longevity, 374 

 Flax, cropping pattern, 360, 361 

 Flooding, effect on trees, 371, 372 

 Fog, absorption by Pinus, 367 



in Alps, 159 



Fog precipitation, 45 



France, dew collectors, 45-46 



— — dewfall, 43 



Fraxinus excelsior, in Hungary, 265 



killed by flooding, 372 



