498 



INDEX 



Gametophyte, male, 122, 332, 339, 



349. 357. 369, 392 

 Gametospore, 118, 122, 172, 201 



germination of, 123, 124, 187, 

 188, 193, 197, 198, 200, 213, 

 214, 215, 276, 277, 280, 286, 

 293. 304, 308, 309, 318, 332, 

 333. 340, 345. 351. 359. 37i. 

 395 

 Gasteromycetes, 266 

 Gemmae, 270, 331 



Generations, alternation of, 136, 137, 

 194, 201, 211-216, 256, 271, 279, 

 281, 319, 352 

 Gentian, 474 



order, 473 

 Gentianales, 473 

 Genus, 146 

 Geoglossum, 232 

 Geraniales, 460 

 Geranium, 384, 461 



order, 460 

 Germ tube, 278 

 Gills, 260, 261, 263 

 Ginkgo, 362 

 Ginseng family, 465 

 Gleditsia, 451, 452 

 Gleocapsa, 166 

 Goebel, 309 

 Goosefoot order, 437 

 Grafting, lOi, 102 

 Grain, 134,' 135, 397, 398, 409 

 Graminaceae, 410 

 Graminales, 405 

 Grape, 461 



blight, 222 



Grass, 406, 407, 409 



family, 410 



order, 405 



Gravity, effect on plant, 62, 104, 106, 



132, 407 

 Ground nut, 455 

 Growth, apical, 56, 98, 200, 270, 304, 



313 

 conditions of, 72, 74, 129 

 definite, 72 

 nature of, 3 

 of stem, 89, 103, 106 



Growth of root, 56 



relation of chemical changes to, 4 



rhythm of, 93 

 Growing point, 56, 98, 270, 313, 346 

 Guard cells, 9, 10, 26 

 Gulf weed, 206 

 Gymnospermae, 353 

 Gymnosporangium, 256, 257 



Hairs, plant, 10, 38, 39, 40 



root, 47, 46, 52 

 Haustoria, 220, 221 

 Hazel, 432 

 Hazen, 177 

 Head, 482, 485 

 Heath order, 470 

 Heartwood, 95 

 Helleborus, 440 

 Helvellales, 231, 232 

 Hepaticae, 271 

 Hepatics, leafy, 288 

 Hepatics, thallose, 271, 272 

 Hereditary substance, 138 

 Heterocyst, 166, 167 

 Heteroecious, 251 

 Heterogamous, 178 

 Heterospory, 347, 352 

 Heterostyly, 462, 463 

 Hickory, fruit of, 435 



branch of, 73 



leaves of, 34 

 Hilum, 129, 130 

 Honey locust, 451, 452 

 Honeysuckle, 387 

 Hop, twining, 106 

 Hormogonium, 166 

 Horizontal branches, 28, 29 

 Hornbeam, 432 

 Horsechestnut, 31, 34 

 Horsetail, 334 • 

 Hybrid, 138 

 Hydnaceae, 264 

 Hydnum, 264 

 Hydrodictyon, 184 

 Hydrolysis, 20 

 Hydrophytes, 39 

 Hymenium, 230, 231, 262, 263 

 Hypha, 68, 217 



