INDEX 



537 



Fairy ring toadstool, 249, 250* 



Fall of the leaf, 19, 66, 68 



Family, 158 



Fermentation, 145, 232, 233 



Ferments, 36 



Fern gametophyte, 282*, 283* 



Fern leaflets, 280* 



Ferns, *274-291 



Fertilization, 201, 325*, 326 



Fertilization, in angiosperms, 116*, 



117*, 118 

 Fertilizers, 209 

 Fibers, 47*, 48* 

 Fibers, commercial, 348, 361 

 Fibrovascular bundles, 11*, 12, 46*, 



54* 



Filament, 110, 111* 

 Filicineae, 274 

 Fission plants, 159 

 Fleshy fruits, uses of, 155* 

 Fleshy roots, 34*, 35 

 Floating seeds, 154 

 Floral diagrams, 114* 

 Floral organs, 20* 

 Flower, 20*, 21, *104-114, 322 

 Flower, definition of, 104 

 Flower, morphology of, 104, *323~327 

 Flower, organs of, 20*, 21, *104-112 

 Flower, plan of, 105*, 106*, 114* 

 Flower, symmetry of, 108, 109* 

 Flower buds, 94*, 95, 96 

 Flowering plants, 156 

 Flowers, ecology of, .*! 18-135 

 Flytrap, Venus, 387* 

 Food, raw materials for, 15, 447, 448 

 Food, storage of, in root, 33, 34*, 35 

 Food, storage of, in stem, 77-79 

 Food, transportation of, in plant, 



78-81 



Food cycle, 15-17 

 Food in embryo, *137-139 

 Food manufacture, 15-17 

 Forest, strata of vegetation in, 490- 



492 



Forest fires, 409, 441, 443 

 Forest map of United States, 510* 

 Forestry, *398-411 

 Forests, pure and mixed, 399 

 Formations, plant, 495 

 Fossil plants, 295-297, 318, 319 

 Foxglove, leaf of, 336* 

 Fruit, *1 50-155 

 Fruit bud, 94*, 95, 96 

 Fruit scars, 101 

 Fruit spurs, 94*, 95, 96 



Fruits, edible, *348-350, 351 



Frullania, *271 



Fucus, 207, 208 



Fuel value of wood, 395 



Funaria, 265 



Fungi, 159,*213-256 



Fungi, classification of, 225, 256 



Fungi, origin of, 215 



Funiculus, 139 



Fusarium, 432 



Gamete, 194 



Gametophyte, 263-265 



Gamopetalous, 110 



Garnosepalous, 110 



Garden vegetables, 464 



Gardening, 167, 451, 464 



Geaster, 254 



Gelatinous foods, 209 



Generations, alternation of, 263-265 



Generative cells in pollen tube, 116* 



Generative nucleus, 116* 



Genus, 156 



Geography, plant, of the United 

 States, *503-513 



Geranium (Pelargonium) cutting, 5* 



Geranium leaf, section of, 14* 



Geranium leaf, surface view of, 13*, 

 70* 



Geranium (Pelargonium) stem, cross 

 section of, 12* 



Germ diseases, 161-179 



Germination, chemical changes dur- 

 ing, 144, 145 



Germination, conditions for, 139, 140 



Germination, preparation for, 140, 

 141 



Gigartina, 210* 



Gills, 248*, 249* 



Ginger, wild, 58* 



Ginkgo, 318* 



Ginkgoales, 311, 318* 



Ginseng, 358* 



Glceocapsa, 180, 181, 182 



Glceotrichia, 186, 187 



Gnetales, 311, 318 



Gourd family, 370 



Grafting, 87, 88*, 89, 462 



Grain, 138*, 139* 



Grape mildew, *219-222 



Grapefruit, 462 



Grapes, 463, 464 



Grass family, *336-340 



Grasses, *336-340 



Grasses, culture of, 458 



