INDEX 



451 



Fibers, traction, 77 



Fibers, wood, 95*, 96 



Fibrous roots, 357* 



Filament of anther, 162 



Fiiicales, 298-311 



Filicales, anatomy of, 301*, 303*, 304*, 



305* 



Filicales, gametophyte, 308* 

 Filicales, gametophyte and embryo, 



309* 



Flagella, 222* 

 Fleshy fruits, 364*, 365 

 Floods, forest control of, 368 

 Floral plans, 361* 

 Flower, morphology of, 339* 

 Flower, parts of, 161, 162*, 163 

 Flower buds, 356 

 Flowers, clustered, 357* 

 Flowers, solitary, 357* 

 Follicle, 364*, 365 

 Food cycle, organic, 11* 

 Food relations of plants and animals, 9 

 Food storage, 98 

 Forces of environment, 3 

 Forest, central hardwood, 383 

 Forest control of rainfall, 368 

 Forest products, 370 

 Forest trees, groups of, 371 

 Forests, national, 366, 368* 

 Form of herbaceous plants, 18* 

 Form of plant body, 14 

 Form of trees, 19*, 20*, 21*, 22, 43* 

 Fragaria (strawberry), 403*, 404* 

 Fruit of mandrake, 166* 

 Fruits, classified, 365, 366 

 Fruits, kinds of, 364*, 366 

 Fucus vesiculosus, 235, 241 

 Fucus vesiculosus, habit of, 236* 

 Fucus vesiculosus, life history of, 240, 



241 

 Fucus vesiculosus, reproduction, 237*, 



238*, 239*, 240* 

 Funaria, 293-297 

 Funaria, gametophyte and sex organs, 



294* 



Funaria, sporophyte, 295* 

 Fungi, 242-285 

 Fungi, classification of, 243 

 Fungi and disease, 281, 285 

 Funiculus of ovule, 162*, 165*, 169* 



Gametangium in Spirogyra, 227 

 Gametes, 57*, 159, 160*, 163* 

 Gametes, female, 164 

 Gametes, male, 164* 

 Gametic purity, 187 

 Gametogenesis, 163 



Gametophyte in algas (Spirogyra), 226 

 Gametophyte in angiosperms, 343*, 



348*, 349* 

 Gametophyte in bryophytes, 288, 



289* 

 Gametophyte in gymnosperms, 322, 



323*, 334*, 335* 

 Gametophyte in pteridophytes, 308*, 



309*, 319* 



Gap, leaf, of ferns, 300*, 301* 

 Gap, leaf, of pines, 327*, 329* 

 Garden pea, Darwin's experiments 



with, 177 



Generative cell of cycad, 323* 

 Generative cell of pollen, 164* 

 Generative cell of spruce, 334* 

 Geotropic, 30 

 Geum triflorum, 410 

 Gladiolus, corms of, 157* 

 Gleba of puffball, 271*, 272 

 Glumes of oat flower, 434 

 Grain of wood, 87*, 88, 90 

 Gramineae, 430, 435 

 Grass, couch, 431* 

 Grasses, 430 

 Gravity, root response to, 33*, 34*, 



36* 



Gravity sense, 31 

 Growth, 67, 72 

 Growth, summary of, 69, 72 

 Growth of buckwheat, 60 

 Growth of corn root, 61* 

 Growth of herbaceous stems, 67* 

 Growth of leaves, 66* 

 Growth of lilac bud. 68* 

 Growth of root-tip, 61*, 64, 65*, 67* 

 Growth of roots and stems, 70* 

 Growth of root-tip cells, 63* 

 Guard cells, 113*, 114, 115* 

 Gymnosperms, 321-336 

 Gymnosperms, Coniferales, 325 

 Gymnosperms, Cycadales, 321 

 Gymnosperms, forest trees, 371-380 



Habit, 353 

 Habitat, 353 

 Hairs, protective, 149* 

 Halberd-shaped leaf, 355* 

 Halophytic association, 435 

 Hanstein, 57 



Hardwood trees, 380, 381*, 382* 

 Head, 358* 



Heart-shaped leaf, 355* 

 Heartwood, 86 

 Hepaticae, 28Y-293 



Herbaceous plants, body plan and 

 form of, 18* 



