546 



INDEX 



Forest map, 491 

 Forest region, 490-492 

 Formations, plant, 474-480* 

 Formative tissue, 64*, 65*, 67*, 366*. 



See growing point 

 Fossil plants, 339-341, Plate VIII 

 Foxglove, leaf of, 90* 

 Free central placentation, 129*, 130 

 Frond, 308*, 309 

 Frost, action of, 121 

 Fruit, 146-150* 

 Fruit bud, 83*, 84* 

 Fucus, 210-212*, Plate IV 

 Funaria, 294*, 296*, 298*, 299*, 301* 

 Fungi, 172, 227-273* 

 Fungi, life histories of, 272, 273 

 Fungi, origin and evolution of, 274 

 Fusion of parts, 395 



Gametangium, 204 



Gamete, 166, 182, 185*, 186, 204 



Gametophyte, 220 



Gametophyte, degeneration of, 404- 

 406 



Gamopetalous, 126 



Gamosepalous, 126 



Gastromycetes, 268*, 269* 



Geaster, 268, 269* 



Generations, alternation of, 220, 278, 

 345-350 



Generative cells in pollen tube, 142*, 

 363, 372* 373, 382* 



Genus, 153 



Geography, plant, definition of, 2 



Geography, plant, of the United 

 States, 489-495 



Geotropism, 31, 32*, 39, 44 



Germ diseases, 235, 236 



Germination, 6-14* 



Germination, chemical changes dur- 

 ing, 6, 7 



Gill fungi, 265-267* 



Gills, 266, 267* 



Ginkgo, motile sperms of, 363 



Gloeocapsa, 174* 



Glceotrichia, 176*, 177 



Glucose, 108 



Grafting, 68*, 69* 



Grain, 7*, 147, 505*, 514-516 



Grape sugar, 79, 108 



Grapevine blight, 247 



Grasses, 398, 514, 615 



Grass pistil, 421* 



Gravity, 31, 39, 44 



Gray, Asa, 46 



Green algae, 179-204* 



Green algae, reproductive organs of, 



204 



Green algae, summary of, 203 

 Green felt, 197, 200* 

 Green layer of bark, 71, 72 

 Ground tissue, 313 

 Growing point, 24*, 280*, 316* 

 Growth, measurement of, in stem, 17* 

 Growth, secondary, 65-67* 

 Guard cells, 104* 

 Gulf weed, 212*, 213 

 Gymnosperm, life history of, 375 

 Gyinnospermse, 359-375* 

 Gymnosperms, 128, 359-375* 



Haematococcus, 181 



Hairs, 417, 418 



Hairs on leaves, 119 



Hairs, root, 15, 16*, 24, 25*, 27*, 28 



Hairs, stinging, 418* 



Halberd-shaped, App. I 



Half-inferior ovary, 130* 



Half parasites, 408 



Halophytes, 459, 468*, 469, 483* 



Hard bast, 25*, 60-66* 



Haustoria, 22*, 248 



Head, 134* 



Heart-shaped, App. I 



Heart wood, 71, 72 



Helianthemum, 487* 



Heliotropic movements, 101* 



Heliotropism, 101* 



Hepaticae, 279-289* 



Herbs, 46 



Heterocysts, 176* 



Heterogamy, 190, 204, 212, 224 



Heterospory, 320, 322, 324, 351-353 



High mallow, provisions for crosk 



pollination of, 429* 

 Hilum, 5* 

 Homology, 151 

 Honeybee, leg of, 422*, 423 

 Honey gland, 423 

 Honey locust thorn, 44* 

 Hop, twining of, 49* 

 Horse-chestnut, leaf arrangement of, 



95* 



Horsetails, 325-329* 

 Host, 22* 23, 407 

 Hot springs, plants in, 178 

 Hyacinth, bulb of, 53* 

 Hybrid, 501 



Hybrid blackberries, leaves of, 510* 

 Hybrid plums, 510* 



