INDEX 
365 
Diervilla, 347 
Differences between Gymnosperms and 
Angiosperms, 36, 37 
Digitalis, 340 
purpurea, 340 
var. gloxinaefolia, 341 
Digitoxin, micro-chemic test for, 52 
Dionaea, 283 
Dioscorea, 252 
villosa, 252 
Dioscoreaceae, 252 
Dittany, 298 
Division, 2 
Dog Bane Family, 332 
Dogwood Family, 325 
Dog’s Tooth Violet, life history of, 32- 
36 
Dorema Ammoniacum, 323 
Dorsoventral Leaf blades, 130-132 
Dragon’s Blood, 248 
Drimys Winteri, 272 
Drosera, 283, 284 
longifolia, 284 
intermedia, 284 
rotundifolia, 284 
Droseraceae, 283 
Drupe, 165 
Dryopteris Filix-mas, alternation of 
generations in, 23 
comparative physiology of root, 
stem and leaf, 18 
gross structure of stem, 13 
sori and sporangia, 19 
growth of seedling into mature 
sporophyte, 23 
histology of growing apex, 15 
lamina, 17 
mature root, 16 
stem, 13 
r.oot apex, 16 
sori and sporangia, 19 
stipe, 17 
history of gametophyte genera- 
tion, 20-22 
sporophyte generation, 13-20 
Dryopteris Filix-mas, origin of new 
sporophyte or diploid plant 
from fertilized egg, 23 
vascular bundles of, 15 
Dryopteris marginalis (frontispiece), 
13 
Duboisia, myoporoides, 339 
Dulcamara, 339 
Duramen, 113 
Ear fungi, 220 
Earth Tongues, 213 
Ebenales, 328 
Ecballium Elaterium, 348 
Echinaceae, 353 
Echinocactus, 317 
Echinocereus, 317 
Echium, 336 
Ecology, 1 
Economic Botany, 2 
Ectocarpus siliculosus, 192 
Ectoplasm, 18 
Egg Plant, 338 
Ehrlich’s Anilin Water Gentian Vio- 
let, 181 
Elaeis guineensis, 248 
Elastica, 303 
Elaterinum, 348 
Elettaria Cardamomum, 255 
Elm Family, 265 
Embryo, 85 
Embryo-sac, 155 
maturation of, 159 
Emulsion, 64 
Endocarp, 160 
Endodermis, 75 
Endospores, 197 
Endosporium, 19 
Endothecium, 
Enzyme, 62 
Enzymes, 62, 63, 64 
Epicalyx, 144 
Epicarp, 160 
Epidermis, 71, 72, 73 
Epithelium, 84 
