628 
INDEX 
Endosperm-nucleus, 440 
Endospores, 99 
Endothia parasitica, 296 
Environment, 125 
factors of, 125 
fitness for, 513 
Enzymes, 79, 86, 94, 100 
Epidermis, 31 
Epiphytes, 326 
Epiphytism, 325, 327 
Equisetales, 368, 618 
Equisetum, 368, 373, 376, 431 
arvense, 368, 370, 371, 374 
debile, 368 
fluviatile, 369 
giganteum, 368 
palustre, 368, 373 
pratense, 368, 371 
Ergot, 293, 295 
Ericaceae, 473 
Eriopus remotifolius, 226 
Erythronium americanum, 434, 
437, 439. 455 
albidum, 437 
Etiolation, 136 
Eugenics, 560, 566 
Eupatorium perfoliatum, 486 
Euthenics, 560 
Evening-primrose, 471, 532, 534 
Lamarck's, 535 
giant, 536 
Evetria buoliana, 301 
Evolution and classification, 539 
early antagonism to, 510 
experimental, 520, 535 
inorganic, 503 
method of, 505 
of plants, 569 
organic, 504 
Excreta, theory of toxic, 92 
Exosmosis, 58 
Extinction, factors of, 589 
Eye-spot, 251 
Factor, 558 
False beech-drops, 324, 339 
Fascicles, 415 
Fats, 71, 84 
Fawn-lily, 434 
Femaleness, maleness and, 353 
Fermentation, 102 
active agent in, 99 
alcoholic, 95, 97 
importance of, 94 
products of, 96 
relation of to our daily lives, 
102 
respiration and, 112 
significance of, 101 
Ferments. 79 
Ferns, 348 
Boston, 528 
eusporangiate, 178, 372 
leptosporangiate, 157 
shield, 158 
walking, 162, 348 
Fertilization, 170, 172, 180 
double, 442 
Fertilization-membrane, 172 
Fever, typhoid, 310 
Ficus elastica, 64, 66 
Filament, 436 
Fittest, survival of, 191, 515 
Flowers and insects, 343 
Flowers, perfect and imperfect, 447 
Foliage-leaf, types of, 156 
Femes applanatus, 303 
Food elements, source of, 72 
Foods, kinds of, 71 
Foot, 174 
Forests, world's first, 610 
Fossil, what is a, 578 
record., gaps in the, 587 
