_Euglena_, 11, 19; Fig. 9. _Euonymus_. See "Spindle-tree." _Euphorbia_, 199; Fig. 109. _Eurotium_, 70; Fig. 42. Evening primrose, 206. _Exoascus_, 66. _Fagopyrum_. See "Buckwheat." Feather-veined. See "Pinnate-veined." Fern, 5, 102, 104, 116. flowering, 118; Fig. 70. lady, 104; Fig. 70. maiden-hair. See "Maiden-hair fern." ostrich. See "Ostrich-fern." sensitive, 104. true, 117. water. See "Water-fern." Fertilization, 225. Fibre, 124, 175, 177. Fibro-vascular bundle, 107, 110, 121, 123, 135, 136, 147, 150, 159, 174. Fig, 183. Figwort, 215, 216; Fig. 120. Filament (of stamen), 148, 17. _Filices_. See "True ferns." _Filicineæ_. See "Fern." Fir, 142. Fission, 23. _Flagellata_, 19. Flagellum, 19. Flax, 197; Fig. 107. Flies, 229. Flower, 128, 131. Flowering-plant. See "Spermaphyte." Forget-me-not, 215. Four-o'clock, 183. Foxglove, 217. _Frangulinæ_, 199. _Fraxinus_. See "Ash." Fringe-tree, 218; Fig. 122. Fruit, 145. _Fucaceæ_, 43. Fuchsia, 201. _Fucus_, 42-46. _vesiculosus_, 43; Figs. 26, 27. general structure, 43, 44. conceptacles, 44. collecting plants, 44. cells, 44. chloroplasts, 44. oögonium, 45. _platycarpus_, 45. antheridium, 45, 46. fertilization, 46. germination, 46. _Fumariaceæ_. See "Fumitory." Fumitory, 192. _Funaria_, 93-99; Figs. 58-62. gross anatomy, 93, 94. protonema, 93. "flower," 94. structure of leaf, 94. chloroplasts, division of, 95. formation of starch in chloroplasts, 95. structure of stem, 96. root hairs, 96. buds, 96. antheridium spermatozoids, 96, 97. archegonium, 97. embryo, 98. capsule and spores, 98, 99. germination of spores, 99. Fungi, culture of, 5, 54. true. See "_Mycomycetes_." alga. See "_Phycomycetes_." Funiculus, 151, 175. _Funkia_. See "Day lily." _Galium_, 223; Fig. 124. _Gamopetalæ_. See "_Sympetalæ_." _Gaultheria_. See "Wintergreen." _Gaylussacia_. See "Huckleberry." _Geaster_, 84; Fig. 49. Gentian, 218; Fig. 122. Gentian violet, 4, 138, 231. _Gentiana_, _-aceæ_. See "Gentian." _Geranium_, _-aceæ_, 3, 171, 196; Fig. 107. _Gerardia_, 217. Germ cell. See "Egg cell." _Gesneraceæ_, 218. Ghost flower. See "Indian-pipe." Gill, 83. Ginger, 163. _Gingko_, 142; Fig. 78. _Gleditschia_. See "Honey locust." _Gloxinia_, 218. _Glumaceæ_, 153, 160; Fig. 87. Glume, 162. Glycerine, 4, 51, 55, 59, 67, 83, 98, 224, 231, 233. _Gnetaceæ_. See "Joint fir." Golden-rod, 224. _Gonium_, 20. Gooseberry, 203; Fig. 111. Goose-foot, 184; Fig. 98. _Gossypium_. See "Cotton." Gourd, 221. _Gramineæ_. See "Grass." Grape, 171, 199; Fig. 109. Grape fern, 116; Fig. 70. _Graphis_, 75; Fig. 45. Grass, 161, 225; Fig. 87. Gray moss. See "_Tillandsia_." Green-brier, 154. Green-felt. See "_Vaucheria_." Green monad, 12, 19. Green slime, 21, 22; Fig. 11. Ground pine, 123; Fig. 73. Ground tissue, 110, 111, 113, 124, 137, 177, 178. _Gruinales_, 196. Guard cell, 113, 135, 150. Gulf weed. See "_Sargassum_."