INDEX 



307 



clitochores, 246 



closed formations, 235, 271 



cog psychrometer, 27, 28 



Colletm, 164 



colluvial soils, succession in, 276 



Comandra, 226, 294 



comate disseminules, 242 



community, 225, 227, 240 



comospores, 242 



compass plants, 145 



competition, 251 



alternation due to, 291 



between different species, 255 



between parents and offspring, 254 



cultures, 259 



effect of position, 256 



factors in, 253 



for water and light , 253 



influence of vegetation form and 

 habitat form, 256 



law of, 255 



mixed cultures, 259 



nature of, 252 



primary law of, 254 



quadrats, 261 



results of, 258 

 , simple cultures, 259 



study of, 259 

 consocies, 225 

 constancy, 187 



constant and inconstant forms, 186 

 contact, 141 

 copious, 205 

 Corallorhiza, 104, 105 

 Corispermum, 238, 245, 252, 262 

 corm, 115 



corresponding species, 294 

 cortical region, 52 

 cover, 22, 24, 27 

 crcatospores, 243 

 Crocus, 131 

 crosses, 197 



cross-pollination, 124, 125 

 crystallochores, 246 

 Cucurbita, 142 



cultivation, succession by, 282 

 cultures, competition, 259 

 Cupressus, 162 



curvature, region of geotropic, 138 

 curves, combinations of, 34 



intervals, 36 



kinds of, 34 



plotting, 35 

 cuticle, 57, 147 

 cutinized leaves, 157 

 Criperacpce, 126, 161, 163 

 cytase, 100 

 cytoplasm, in growth, 106 



daikness, influence of, 80 



Darwin, 187, 251 



and the " Origin of Species," 188 



evolution after, 189 



on competition, 195 



on single origin, 199 

 Datura, 261 



day-bloomers, 120, 130 

 decade method, 287 

 decomposition, 17 

 definite variation, 189 

 dehiscent dry fruits, 132 

 Delphinium, 120 

 denuded quadrat, 204, 209 

 derived species, 273 

 dermatogen, 39, 41 

 developmental classification, 233 

 development of the format on, 219 

 De Vries, 200 



on mutation, 190, 192 

 dew, 21 



diaphragms, 167 

 diastase^ 100, 103 

 dichogamy, 122 

 diclinism, 122 



dicotyledons, stem structure of, 52 

 diffusion, 48, 84 



in the leaf, 58 

 digestion, 99 

 diphotic leaves, 174, 182 

 diplophyU, 183, 184 

 direct factors, 5 

 direction of migration, 249 

 Discomycetes, 247 

 disintegration, 16 



disposition of stamens and pistils, 122 

 dissected form, 160 

 dissemination, organs of, 241 

 disseminules, 242 



position of, 244 

 division of labor, 116 

 dominant character, 198 

 dominant species, 221 

 Draba, 228 

 drupe, 132 

 dry fruits, 132, 247 



ecad, 155, 192, 193 



ecesis, 98, 220, 261, 270, 284 



alternation due to, 290 



factors in, 262 

 echard, 9, 14 

 Edinnia, 217 

 Elymus, 225, 239 



Elymus-M uhlenbergia-iormation, 225 

 endemic, 268 

 endemism, 268 

 endoderm, 41, 52 

 endosmose, 46 

 enzjTiies, 99, 100 

 Epliedra, 163 



