INDEX 



457 



sperms, 167 ; of Gymnosperms, 



127. 



Energy, 34. 



Epidermis, 69, 192, 205. 

 Epigynous, 156. 

 Epilobium, pollination of, 163. 

 Epiphytes, 269. 

 Equisetales, 102. 

 Equisetum, 100, 101, 107. 

 Evergreen habit, 215. 

 Evolution, 4. 

 Experiment Stations, 334. 



Fats, 177. 



Ferns, 88, 90, 92, 102, 103, 104, 

 105, 106, 107. 



Fertilization, 23 ; in Angio- 

 sperms, 143 ; in Gymno- 

 sperms, 125. 



Fibre plants, 411. 



Fig wort, pollination of, 162. 



Filament, 123, 134. 



Filicales, 104. 



Fireweed, seed of, 170. 



Flax, 414, 415. 



Flora, 8. 



Floriculture, 297, 401. 



Flowers, 130, 401 ; evolution of, 

 151. 



Food manufacture, 31. 



Food problem, 340. 



Food storage, 177. 



Foot, 76. 



Forage plants, 362. 



Forestry, 5, 419. 



Forests, care of, 422; character 

 of, 420; and floods, 421; for- 

 mation of, 421 ; products of, 

 424 ; protection of, 423 ; reser- 

 vations, 427. 



Forest succession, 277. 



Fruit, 147, 383, 387. 



Fucus, 17, 26, 27, 28. 



Fungi, 40. 



Fungicides, 449. 



Funiculus, 141. 



Gametangium, 26. 

 Gamete, 23. 



Gametophore, 77, 78, 79. 

 Gametophytes, 76, 110, 111; of 



Angiosperms, 141 : of Ferns, 



98 ; of Gymnosperms, 123, 



124. 



Gardening, 368. 

 Gemmae, 73. 

 Geotropism, 179. 

 Germination, 22 ; of seeds, 174. 

 Germinator, seed, 321, 322, 324. 

 Girdling, 240. 

 Gloeothece, 12, 13. 

 Gloeotrichia, 13, 14. 

 Gooseberry, 400. 

 Gourd family, 384. 

 Grafting, 241, 330. 331, 332. 

 Grape, 396 ; spot disease of, leaf, 



439. 



Grape-fruit, 395. 

 Grass family, 362. 

 Green Algse, 31. 

 Guard-cells, 193. 

 Gymnosperms, 114, 115. 



H 



Habit, 224. 

 Habitat, 273. 

 Hairs, 206, 207. 

 Haustoria, 46. 

 Heart wood, 243. 

 Heat, 301. 

 Hemp, 416. 

 Heredity, 5. 

 Heterospory, 108. 

 Homospory, 108. 

 Horsetails, 102. 

 Horticulture, 297. 

 Host, 41. 



Houstonia, flower of, 164 ; pol- 

 lination of, 163. 

 Hybridization, 338. 

 Hydrophytes, 279. 

 Hydrotropism, 180. 



