INDEX 
Fructose, 359. 
Fruits, loss of, 355. 
Fucales, 49. 
Fucus, fertilization and embryo, 52; habit, 
4Q; sex organs, 50, 51. 
Fuligo, aethalium, 3 ; plasmodium, 2. 
Function, 297 ; unit of, 298. 
Fungi, 61 ; chemotropism of, 473. 
Galls, 3Q4, 440. 
Gametangium, 45, 46. 
Gamete, 16, 77, 22, 23, 25, 46, 49. 
Gametophyte, 32 ; thallophytes, 52, 60, 85 ; 
liverworts, 92, 03, 97, 101, 103, 106 ; 
mosses, in, 115; pteridophytes, 127, 128, 
131, 747, 148, 153, 165, 166, 167 ; female, 
136, 140, 174, 175, 178, 179, 196, IQQ, 205, 
210, 211, 214, 216, 223, 232, 234, 264, 265, 
266; male, 135, 140, 174, 175, 178, IQQ, 
205, 206, 210, 215, 2/7, 223, 224, 235, 267. 
Gases, diffusion, 302 ; entry and exit, 322 ; 
exclusion, 318 ; from shoot, 352. 
Gasteromycetes, 89. 
Geaster, 90. 
Gemmae, 98, 104, 117. 
Generative cell, IQQ, 224, 267. 
Gentianales, 282. 
Geotaxy, 450. 
Geotropism, 459 ; lateral, 467. 
Geranium, section of cortex, 240. 
Germinal selection, 291. 
Gill, of mushrooms, 88, 8g. 
Gill fungi, 88. 
Ginkgo, leaf, 207; female gametophyte, 
211; ovule, 210; proembryo, 212; stro- 
bili, 208, 2OQ. 
Ginkgoales, 207. 
Girdles, leaf trace, 193, 194. 
Girdling, 347. 
Glands, geranium, 337; form, 338; Syringa, 
338; nectar, 330; resin, 340. 
Gleba, Gasteromycetes, oo. 
Gleichenia, sori, 156; stele, 159. 
Gleicheniaceae, 155. 
Glochidia, 174, 175. 
Gloeocapsa, 5. 
Gloeothece, 5. 
Glucose, 359, 375. 
Glucoside enzymes, 400. 
Glumales, 276. 
Glumes, 277. 
Gnetales, 228. 
Gnetum, embryo, 236; female gametophyte, 
234; ovule, 234; strobili, 231, 232. 
Gonidia, 19. 
Gradient, 304. 
Grand period, 421, 422. 
Grape mildew, 66. 
Gravity, movements, 455 ; nastic curvatures, 
443- 
Green algae, 15. 
Growing point, angiosperms, 239, 240, 247. 
Growing regions, 422. 
Growth, 41 7 ; curvatures, 458 ; and food, 
363 ; and light, 435 ; movements, 457 ; 
rapidity, 424; and transpiration, 326; 
and turgor, 310. 
Guard cells, 251, 320. 
Gulf weed, 52, 53. 
Gums, 413. 
Guttation, 332 ; artificial, 333 ; in fungi, 
333 ; nightly, 333. 
Gymnosperms, 180, 181. 
Haustorium, fungi, 61, 381, 398; po'len 
tube, 201. 
Heat, cause of death, 483 ; from respiration, 
407. 
Helminthostachys, 149 ; habit, 151. 
Helobiales, 276. 
Helotism, 382. 
Helvellales, 71. 
Hemerocallis, nectar gland, 339, 
Hemitelia, sporangium, 57. 
Hepaticae, 93. 
Herbarium mold, 74. 
Heredity, 293. 
Heterangium, 182. 
Heterocysts, 7, 8, 9. 
Heterogamy, 17. 
Heterospory, 132, 133, 134. 
Heterotrophic plants, 362, 380. 
Hippuris, stem tip, 240, 418, 
Homospory, 134. 
Hormogonia, 8. 
Horsetails, 143. 
Host, 61, 381. 
Humidity, and transpiration, 329. 
Hybrids, 268, 293. 
Hydnaceae, 88. 
Hydnum, 88. 
Hydrodictyon, 21, 22, 23, 445. 
Hydropteridineae, 170; conclusions, 179, 
Hydrotropism, 475. 
Hymenium, 71. 
Hymenogastrales, oo. 
Hymenomycetes, 86. 
Hymenophyllaceae, 155. 
Hymenophyllum, sorus, 156. 
Hyphae, 61. 
Hypogyny, 255. 
Hyponasty, 442. 
Hypophysis, 271, 273. 
Imbibition, 300. 
Impatiens, geotropic curvature, 461. 
E 
