INDEX 
Dodders, 472. 
Dorsiventrality, 437. 
Dorycordaites, 204. 
Dotted ducts, 241, 243. 
Double fertilization, 269. 
Downy mildews, 65. 
Drosera, 387, 454. 
Ear fungi, 86. 
Earth star, 90. 
Ebenales, 281. 
Ecology, 295. 
Ectocarpus, 45. 
Ectoplast, 306. 
Efficiency, 371. 
Egg, thallophytes, 17, 18, 19, 28, 30, 32, 36, 
51, 64; bryophytes, 96, 107, 118; pteri- 
dophytes, 130, 137, 140, 154, 168, 179; 
spermatophytes, 198, 216, 217, 226, 265, 
266, 269. 
Egg apparatus, 265. 
Eichhornia, megaspore tetrad, 263. 
Elaterophore, 103. 
Elaters, 100. 
Electric waves, 438. 
Electrotropism, 479. 
Eligulatae, 132. 
Embryo, angiosperms, 271, 272, 273, 274, 
275; Botrychium, 153, 154; Equisetum, 
149; ferns, 168, 169; gymnosperms, 189, 
200, 201, 202, 211, 212, 218, 225, 226, 227, 
2 36> 2 37 ! Isoetes, 141 ; Lycopodium, 130, 
131 ; Selaginella, 137. 
Embryo sac, 197, 198, 199, 234, 261, 264, 265, 
266. 
Endarch, 157. 
Endodermis, 240. 
Endogenous, 250 ; root branches, 248. 
Endosperm, 202, 211, 223, 270. 
Endothecium, anthers, 257, 258, 259; bryo- 
phytes, 95, 97, 99, 108, 113, 115, 118, 119. 
Energy, 368 ; absorbed, 370. 
Entomophthorales, 68. 
Environment, 284. 
Enzymes, 39 ; carbohydrate, 399 ; fat, 400 ; 
glucoside, 400 ; protein, 401. 
Ephedra, archegonia, 233; embryo, 236, 
237; habit, 228; male gametophyte, 235. 
Epidermis, angiosperms, 239, 240, 242, 248, 
250, 251, 319; bryophytes, 94, 98, 109, 
118, 120; pteridophytes, 145, 160, 161. 
Epigyny, 255. 
Epinasty, 442. 
Epistrophe, 450. 
Epithem, 332. 
Equilibrium, position of, 463. 
Equisetales, 143 ; conclusions, 149. 
Equisetum, 143 ; antheridium, 148; embryo, 
149; gametophyte, 147; habit, 744; 
sporangium, 146 ; stem section, 145. 
Ergot fungus, 77. 
Ericales, 281. 
Erysiphaceae, 75. 
Erysiphe, haustorium, 381. 
Etiolin, 367. 
Eudorina, 17, 18. 
Euglena, 20. 
Eumycetes, 62. 
Eurotium, 74. 
Eusporangiates, 126. 
Evaporation, 323. 
Evolution, 283. 
Exarch, 157. 
Excitability, 434. 
Exine, 147, 258. 
Exoascus, 71. 
Exobasidiales, 86. 
Exogenous, origin of branches, 419. 
Exudation, 332, 333; cause, 335. 
Fagus, mycorhiza, 382. 
Farinales, 278. 
Fat enzymes, 400. 
Fatigue, 432. 
Fats, 360, 391. 
Fermentation, 385, 409 ; acetic, 41 1 ; alco- 
holic, 409; butyric, 411 ; lactic, 410. 
Ferns, 155. 
Fertilization, gymnosperms, 201, 211, 215, 
217, 225, 226, 235, 268, 269; mosses, 116; 
pteridophytes, 136, 168; thallophytes, 18, 
28, 66. 
Ficus, leaf skeleton, 343. 
Filament, of anther, 256, 257. 
Filicales, 155. 
Filicineae, 155 ; conclusions, 170. 
Filmy ferns, 155. 
Flagella, 445. 
"lagellates, 20. 
?lorideae, 55. 
"lower, 180, 251. 
flowering plants, 180. 
"luorescence, 370. 
Flytrap, 386, 387. 
Food, 356 ; and growth, 363 ; source of 
energy, 363 ; storage, 388 ; translocation, 
388. 
"oot, bryophytes, 100, 103, 108, 109, 113, 
114; pteridophytes, 130, 131, 137, 141. 
149, 154, 1 68. 
jormaldehyde, 360. 
?orm and light, 437. 
Normative stimuli, 435. 
fragmentation, blue-green algae, 7. 
?riction, as stimulus, 470. 
Fronds, 159. 
D 
