INDEX 



361 



Cones of gymnosperms, 283, 284*, 



288*, 293* 

 Conidia, 239 



Coniferous forest, 287*, 295*, 297* 

 Coniferous woods, 108-110 

 Conifers, industrial importance of, 



108, 288, 289 

 Conjugation, 224*, 225 

 Coppice, 118, 121 

 Coprinus, 257*, 261 

 Conn, 87 



Corn, cultivation of, 322 

 Corn, fibrovascular bundles of, 11 

 Corn, flowers of, 15*, 143*, 144* 

 Corn, grains of, 17*, 183* 

 Corn, pollination of, 143*, 144*, 184, 



185* 



Corn, root system of, 7*, 30*, 31 

 Corn, whole plant, 7* 

 Corn breeding, *181-186 

 Corn smut, 251* 



Corn stem, structure of, 11*, 68* 

 Corolla, 14*, 125* 

 Cortex, 11*, 20*, 63* 

 Cotton, 313 

 Cotton wilt, 247 

 Cottonwood buds, development of, 



100*, 101* 



Cottonwood plantation, 115* 

 Cottonwood twigs, 100*, 101*, 105* 

 Cotyledon, 158*, 159*, 162*, 164* 

 Cowpea, 205* 

 Crossing, 187 



Cross-pollination, 139, *144-154, 185* 

 Crown gall, 211* 

 Cryptogams, 299 

 Cucumber, wilting of, 23* 

 Cup (cupule) of Marchantia, 269* 

 Cuticle, 285* 

 Cuttings, 90* 

 Cyanophyceae, 260 

 Cypress, 26*, 294 

 Cytoplasm, 21 



Dahlia, thickened roots of, 45* 

 Daily movements of leaves, 77* 

 Dandelion, fruits of, 167* 

 Darwin, Charles, 138, 167, 190* 

 Dasya, 232*, 261 

 Decay, 203, 204 

 Deciduous, 82, 83 

 Dehiscence, 299 

 Denitrification, 206 

 Dependent plants, *48-54 

 Desert plants, 28, 29* 



Detasseling corn, 185, 186, 188, 189 



Diastase, 166 



Dichogamy, 152*, 153* 



Dicotyledonous stem, cross section 

 of, 12, 62 



Dicotyledonous stem, minute struc- 

 ture of, 63*, 64* 



Dicotyledons, 158, 302, 306 



Diffusion, 41 



Digestion, 46 



Dimorphous flowers, 153* 



Dioecious flowers, 127* 



Diphtheria, 213 



Disease, 210-218, 328-331 



Distribution of plants, 4 



Distribution of seeds, 166, 167, 170, 

 171 



Diurnal position, 77* 



Dodder, 51*, 52 



Dogtooth violet, 72* 



Double fertilization, 302 



Douglas fir, 294 



Downy mildew, *239-242 



Drainage, 321 



Dry farming, 322, 323 



Duckweed, 29* 



Dunes, 2*, 4 



Ecology, plant, definition of, 137, 



197 



Economic botany, 197 

 Edible seeds, dispersal of, 171 

 Egg apparatus, 136*, 301* 

 Egg cell, 136*, 228*, 301* 

 Elater, 278*, 279 

 Elementary species, 180 

 Elements occurring in plants, 37-39 

 Elodea, 31 



Embryo, 16, 17*, *158-160, 302, 303* 

 Embryo sac, 300, 301*, 303* 

 Endosperm, 158, 160*, 162*, 183*, 



303 



Endosperm nucleus, 136*, 303* 

 Enzymes, 165, 166, 301 

 Epidermis, 11*, 20*, 285* 

 Epigynous, 131*, 132* 

 Epiphytes, *48-52 

 Equisetum, 278*, 279 

 Erosion, 26, 27, *325-329 

 Eucalyptus, 24, 76, 77*, 117* 

 Euphorbia, 82*, 83 

 Evening primrose, flowers of, 132* 

 Evening primrose, fruits of, 168* 

 Evening primrose, rosettes of, 72* 

 Evergreen, 284 



