INDEX 



369 



Doyle, 174, 204, 205 



Drabna verna, 245 



Draparnaldia, 42 



Drapanialdiopsis, Al 



Drew, 60 



Driesch, 322, 333 



Drosera rotimdifolia. Fig. 6 



Dryopteris, 38, 56, 130, 131, 150, 166; 

 D.aristata, 10, 164; D.filix-mas, 154, 

 155; D. parasitica, 155, 162 



DuBuy, 18, 48 



Diidiesnaya, 58 



Dumontia, 58, 60 



Dumortiera, 70 



Dupler, 210, 212 



Durand, 70 



Duvick, 297 



dynamic structure, 320, 321 



Eames, 175, 197, 214, 216 



East, 297 



Earle, 253 



Edman, 292 



egg apparatus, 224 



egg, constitution after fertilisation, 49; 

 irradiation of, 49; plasmolysis of, 49; 

 effect of centrifuging, 50; effect of 

 mechanical factors on, 51; gene- 

 controlled differentiation in, 25; 

 membrane, 176; respiration of, 49; 

 in plants and animals, 49; submicro- 

 scopical structure of, 47, 48 



Ekdahl, 290 



Elatostema, 292; E. sinuatum eusimia- 

 tum, 290; Fig. 80; E. eurhynchum. 

 Fig. 80 



Elymus arenarius, 301 



embryo, 40; apical cell of, 55; apical 

 meristem of, 55, 56; culture 56, 57; 

 anomalous developments in, 56, 57; 

 definition of, 1; dissection of, 189; 

 examination of, 189 



embryo culture, 54, 134, 161, 162, 188, 

 300, 301, 302, 304, 306, 307, 308, 310, 

 311, 312 



'embryo factor,' 302, 303 



embryo sac, 172, 218, 223, 272, 281; 

 physiological conditions in, 224; 

 nutrition in, 224; polar gradients in, 

 224; types of, 224; heterogeneous 

 metabolism of, 224; organisation of, 

 225; haustorial development of, 227 



embryo tube, 114, 115, 123 

 embryogenesis, definition of, 1 

 embryological similitude, 323, 328 

 embryology and taxonomy, 238, 244 

 embryology, aspects of, 231 

 embryonal formulae, 235 

 embryonal tubes, 192, 205, 268 

 embryonic cell, 93, 108, 109, 110, 174, 



177, 218, 220 

 embryonic cells, size of, 37 

 embryonic environment, 107 

 embryonic selection, 194 

 embryonomic laws, 249, 250 

 embryonomic types, 230, 235, 240, 242, 



244, 268; Fig. 55 

 Embryophyta, 1, 7, 9, 40, 42, 63 

 embryos, general features of, 317, 318 

 embryos, non-viable, 3 1 1 

 embryos, petrified, 184 

 Embryoschlauch, 114, 115, 123 

 Encephalartos, 178, 180, 183, 184 

 endogenous organs, 126, 133, 134, 136, 



137, 139, 140, 183, 198, 274 

 endoscopic, 15, 23, 29, 30, 93, 94, 103, 



105, 108, 121, 127, 137, 139, 141, 169, 



177, 220, 328 

 endosperm, 172, 174, 177, 277, 281, 289, 



297, 311, 315; free cellular, 228; 



genetical aspects of, 224, 225, 226 

 endosperm, haustorial development of, 



227, 261 

 energy relationships, 161 

 Engler, 1, 257 



Enteroniorpha intestinalis, Fig. 1 ; 9 

 environment of embryos, 233 

 environmental factors, 106, 233, 318 

 enzymes, 123, 193, 221, 311 

 Ephedra, 175, 214, 216, 218; E. alfis- 



sima, 216; E. foliata, 216; E. 



trifiirca, 215; Fig. 52 

 Ephedraceae, 215 

 Ephedrophyta, 175, 214 

 Ephemerum, 80 

 epibasal, 22, 93 



epiblast, 262, 270, 272, 276, 278 

 epicotyl, 238 



Epidendrum ciliare, Fig. 70; 268 

 epigenesis, 34, 38, 331 

 Epilobiwn, 240, 312 

 Epipactis, Fig. 70; E. palmatus, 268; 



E. pains tr is. Fig. 6 ; 70 

 epiphysis, 237, 247 



