INDEX 
Differentiation, 102. 
Digestion, 87. 
Dionea, 40. 
Disease, bacteria, 134, 135. 
Disk, 310. 
Dotted duct, 53. 
Downy mildew, 142. 
Drosera, 38. 
Drought, 337. 
Drought plants, 326. 
Drupe, 239, 288. 
Dune, 338. 
Ectocarpus, 120. 
Egg, Angiosperms, 235; Cidogo- 
nium, 110. 
Embryo, 85; Angiosperms, 236; 
Conifers, 217. 
Endosperm, 86; Conifers, 218. 
Enzyme, 88. 
Epidermis, leaf, 15, 24; Marchan- 
tia, 167; stem, 50. 
Epiphyte, 82. 
Equisetum, 197. 
Ericacee, 302. 
Evergreens, 33. 
Family, 262. 
Fat, 89. 
Fermentation, 
yeasts, 138. 
Ferns, 183; antheridia, 193; ar- 
chegonia, 193; fertilization, 195; 
gametophyte, 193; general char- 
acters, 184; leaves, 187; life- 
history, 187, 196; sperms, 194; 
sporangia, 191; sporophyte, 187, 
195; vascular system, 188. 
bacteria, 134; 
Fertilization, 107; Angiosperm, 
236; conifer, 216; fern, 195; 
Fucus, 124; liverwort, 169; 
Mucor, 142; Gidogonium, 110; 
24 
359 
Peronospora, 143; red Alge, 
126; rusts, 152; Spirogyra, 114; 
Ulothrix, 107. 
Fiber, 295. 
Fig, pollination, 252. 
Figwort, pollination, 249. 
Filament, 224. 
Flax, 296. 
Flower, 220; apocarpous, 284; 
bilabiate, 223; cleistogamous, 
243; clusters, 232; dicecious, 
230; Epigynous, 231; hypogy- 
nous, 231; insects, 242; monce- 
cious, 230; naked, 222; numbers, 
229; papilionaceous, 291; pistil- 
late, 230; protandrous, 250; pro- 
togynous, 250; staminate, 230; 
sympetalous, 223. 
Foliage leaves, 34. 
Forest, deciduous, 350; protective, 
322; reservations, 322; supply, 
321; tropical, 355; xerophytic, 
344, 
Forestry, 320. 
Frond, 64, 187. 
Fruit, 238. 
Fucus, 118, 122. 
Fungi, 129, 165. 
Gametangium, 122. 
Gamete, 107. 
Gametophyte, 171; Angiosperm, 
235; Conifer, 215; Equisetum, 
200; fern, 193; Lycopodium, 
202; Selaginella, 204. 
Genus, 262. 
Geotropism, 90. 
Germination, conditions, 86; seed, 
84, 218. 
Gills, 155. 
Girdling, 55. 
Gloeocapsa, 98. 
