276 



INDEX 



Cypress, bald, 94 

 knees, 20 



Dsedalea confragosa, 102 

 Dahlia, food in, 18 

 Dandelion, 35, 121, 133 



food in, 18 



root contraction in, 22 

 Darbishire, O. V., 116 

 Darwin, Charles, 64, 79 

 Datura tatula, pollination of, 84 

 Daubenmire, Rexford F., 219, 254 

 Dean, B. E., 26 

 Deciduous forest communities, 238- 



herbs, 36 



trees and shrubs, 35 

 Decoden verticillata, 77 

 Dehiscence, 183 

 Delphinium, pollination of, 82 

 Deposits, 204, 205, 218 

 Desert communities, 251-252 

 Desiccation, 19, 40 

 Dew point, 141 

 Dicentra cucularia, 232 

 Dichogamy, 75 

 Dickson, James G., 137 

 DicHnous, 67, 73 

 Diebold, C. H., 157 

 Dioecious, 67 

 Dionsea muscipula, 61 

 Diphotophylls, 45 

 Dischidia, 64 

 Dittmer, H. J., 26 

 Doak, K. D., 117 

 Dodder, 103, 236 

 Dogbane, 222 

 Dogwoods, 39, 229 

 Dominant species, 182 

 Dormancy, 209 

 Douglas fir, 244 

 Drosera rotundifolia, 60, 230 

 Dry after-summer, 236 



fore-summer, 235 

 Duckweed, 24, 167, 229 



pollination of, 71, 72 



roots of, 24 

 Dust, 138 

 Dutchman's breeches, 232 



pipe, flowers of, 85 

 Dwarf plants, 39 



E 



Earthworms, 150 

 Ecesis, 207 

 Echard, 147 



Echinochloa crusgalli, 223 

 Eckert, J. E., 88 

 Ecological anatomy, 265 

 factors, 118 



-241 



Ecological structure, 194 

 Ecology and conservation, 259 



definition of, 12 

 Edaphic factors, 156 

 Eichornia, air spaces in, 46 

 Eldredge, A. G., 18, 153, 183, 196, 221 

 Eleagnacese, 113 

 "Elfin timber," 141, 142 

 Elm, 100, 184, 224 



pollination of, 68 

 Emerson, Fred W., 179 

 Engleman spruce, 39, 135, 141 

 Eyitoloma, 60 

 Entomophilous flowers, 73-78 



cross pollination in, 75, 77 

 Environment, 13 

 Ephedra, 249 

 Epidermis, 32 



Epilobium angustifolium, flowers of, 76 

 Epiphylls, 97, 100, 116 

 Epiphytes, 95-100, 176 

 Epipogon, 110 

 Ericaceae, 110 

 Eriogonum, 251 

 Eriophorum, 185 

 Erosion, 218 



by water, 17, 204 



by wind, 204 



checked by plants, 17 

 Esthetic value of plants, 1 1 

 Euphorbia, 236 

 Evans, M. W., 128 

 Evening primrose, 224 

 pollination of, 84 

 Evergreen herbs, 35 

 Ewing, J., 230 

 Excurrent trees, 27 

 Exodermis, 25 



Fasciations, 196 

 Facies, 198 



Factors of environment, biotic, 118 

 diagram of, 12 

 physical, 118 



which modify the typical succes- 

 sion, 217 

 Facultative parasites, 102 

 Fagan, M. M., 116 

 Fagus grandifolia, 223, 238 

 False mermaid weed, 187 



Solomon's seal, 223 

 Felt, E. P., 116 

 Ferns, stems of, 27 

 Ferocactus, 249 

 Festuca ovina ingrata, 23 

 Fibers, 30, 31 

 Fibrovascular bundles, 29 

 Field sorrel, 152 



studies, 11 



work, 11, 264 



