352 



Index 



Cretaceous, flora of, 150, 241, 



242, 253, 254, 259 

 Cross-pollination, 144, 148, 



178, 183, 225, 227, 234, 309 

 Cup-fungi, 76 

 Custard apple family, 269, 



283 



Cutleria, *66 

 Cyanophyceae (see also 



"Blue-green Algse"), 49 

 Cycad, Cycadales, no, in, 



126, 132, 133, 152, 160, 162, 



183, 240, 241 ; fossil, 240 

 Cycas, *I24, *I27, 136, 138, 



140, 141, 145 ; C. revoluta, 



136 



Cycadeoideae, 137 

 Cypress, 142, 145, 196, 256 

 Cytisus Adami, 341 



Daffodil, 159, 251, 337 



Daisy, 267, 290 



Dandelion, 158, 173, 246, 267, 



288, 200 

 Dansea, *o8 

 Darwinism, 311 

 Datura, 229 

 Deciduous habit, 38 

 Desmids, 203 

 Desert plants, 37, 199 

 Determinant, 21, 324, 346 

 Determinate variation, 174, 



309, 3io 

 Devil's apron (see Lami- 



naria) 

 Devonian plants, 116, 118, 



130, 236 

 Diatoms, 62, 63 

 Diclinous flowers, 154, 156, 



171, 226 

 Dicotyledons, 150, 156, 159, 



161, 162, 168, 169, 170, 173, 



184, 309 



Digitalis (see also " Fox- 

 glove"), D. ambigua, 337; 

 D. lutea, 337; D. purpuras- 

 cens, 337; D. purpurea, 

 337 



Dionsea, 219 



Discontinuous variation, 306, 



319, 320 



Dodder (Cuscuta), 13, 216 

 Dogwood, 177, 270 

 Dogtooth violet (Erythroni- 



um), 269 

 Dominant (Mendelian), 327, 



328 



Dracaena, 164 

 Draparnaldia, *s6 

 Drosera, 219 

 Drought, protection against, 



43 



Dryas, 263 



Duckweed (Lemna), 195 

 Dumortiera, 239 

 Durian, 283 



Ectocarpus, *66 

 Eel-grass (Zostera), 195 

 Egg, 21, 54, 67 

 Elm, 244, 251, 268 

 Embryo, 88, 128, 157, 161, 164 

 Embryo-sac, 153, 154 

 Endophyte, 106 

 Endosperm, 128, 157 

 Engram, 326 

 Environment, 25 

 Enzyme, 71, 212 

 Ephedra, 143, 144 

 Epigynous flowers, 176 

 Epiphegus, 217 

 Epiphyte, 117, 207, 208 

 Equisetum, Equisetinese, 29, 



103, *ios, 132 

 Erodium, 29, 214 

 Erythrina, 180, 235 

 Erythronium, 269 

 Eschscholtzia, 275 

 Eucalyptus, 177, 207, 210 

 Euglena, 12 

 Eumycetes, 74 

 Euphorbia, 199, 249 

 Eusporangiate ferns, 239 

 Evening primrose, 321 

 Everlasting flower (Gnapha- 



litim), 262 



