756 
Dryopteris Filix-mas, histology of grow- 
ing apex, sori and sporangia, 
66 
stem, 55 
stipe, 60 
Figs. of trans.-sect., 61 
history of gametophyte genera- 
tion, 67 
sporophyte generation, 53 
life history of, 53 
origin of new sporophyte or diploid 
plant from fertilized egg, 71 
Dryopteris marginalis, 482, 435° 
Duboisia, 598 
Duboisia myoporoides, 598 
Dujardin, 17 
Dulcamara, 598 
Duramen, 213 
Earth Stars, 410 
Ebenales, 581 
Eberthella typhi, 373 
Ecballium Elaterium, 608 
Echinacea, 615 
Echinocactus, 567 
Echinocereus, 567 
Echium, 592 
Ecology, 3, 616 
Economic Botany, defined, 3 
Ectocarpus siliculosus, 352 
Ectoplasm, 25, 43, 374 
Egg Plant, 304, 597 
Eichler, A. W., 326 
Elaagnacea, 569 
Elaioplastids, 42, 133 
Elais guineensis, 487 
Elastica, 551 
Elaterinum, 608 
Elaters, 422, 437 
Elder, 606 
Elettaria Cardamomum, 492 
Elm, 303 
Slippery, 506 
Elm Family, 507 
Elodea, 20 
Embryo, 8, 295, 311, 452 
Figs. showing development of, 
294, 295 
parts of, 311 
INDEX 
Embryology, defined, 2 
Embryo-sac, 287, 449, 474 
maturation of, 292, 474 
Emetinz Hydrochloridum, 605 
Emulsin, 103 
Endocarp, 298 
Endodermis, 127 
Endoperidium, 410 
Endoplasm, 25, 43, 374 
Endosmosis, 154 
Endosperm, 293, 314 
Endospore, 282, 292 
Endospores, 369, 378, 381 
Endosporium, 68, 475 
Endothecium, 278, 280 
Endotoxins, 370 
Engler and Prantl, 326 
English ivy, 575 
roots of, 161 
Entada scandens, 301 
Enzyme, defined, 26, 101 
Enzymes, 101 
classification of, 102 
proteolytic, 94, 103 
Eosin, 682 
Ephedra, 467, 468, 469, 470 
Ephedra distachya, 471 
Ephedra equisetina, 471 
Ephedra Gerardiana, 471 
Ephedra sinica, 468, 470, 471 
Ephedrine, 471 
Epicalyx, 269, 535 
Epicarp, 298 
Epicotyl, 311 
Epidermal outgrowths, 124 
hairs, 124 
papilla, 124 - 
scales, 124 
Epidermis, 122 
Epigaa repens, 581 
Epilobium, 569 
Epiphytes, 161 
Epipremnum pinnatum, 487 
Epithem, 124 
Equisetineae, 91, 431, 437 
Equisetum, 437 
arvense, 438 
life history of, 43 
Ergonovine, 397 
