INDEX 



605 



Gramineae, dispersal of, loi, ii6, 120, 



307 

 — , dominance of, 360, 361-4, 387, 443-5 



— halophilous (halophytic), 369, 371 

 — , sand-dune, 122, 123, 328, 371, 458, 

 Granadilla, 258 [542, 548, 549 

 Grape, see Vt'tis vinifera 

 Grapefruit, 258 



Grass family, see Gramineae 

 Grasses, see Gramineae 



— in competition with trees, 307-10, 360 

 Grassland, 85, 213, 246, 289, 306, 314, 



333, 359-64, 443-7, 556, 578 

 — , fire and, 310, 359, 444, 466 

 Gravel, 298, 315, 328, 366, 449, 522 

 Grazing (see also Browsing), effects of, 

 85, 222, 307, 308, 330, 331, 355, 

 359,363,364,444-447,465,466,558 

 — , forest regeneration and, 307, 308 

 Great Britain, 1 19 



— Lakes (N. America), 338, 349, 371 

 Green Alder, see Alniis crispa agg. 



■ — Algae, see Chlorophyceae 



— manure, 279 



— plants, depth of water inhabited by, 



475, 485-8, 496, 527, 530, 537 



— snow, 490 



Greenheart, see Ocotea rodioei 

 Greenland, 119, 162, 172, 186,391,409, 



— , American plants introduced to, 181 



— , caterpillars and sheep in, 306 



— , cryophytes in, 490 



• — , cultivated plants in, 231, 233, 234 



— , drifting of, 166 



— , flora of, 169, 172 



• — , fossil flora of, 149, 150 



— , glaciation in, 156, 162, 414 



— , immigrant weeds in, 165 



— , woody vegetation of, 222, 344, 390, 



Grey-brown polyolic soil, 300 [391 



Grimmia, 417 



Grinnellla, 40 



Grisebach, A., 22 



Groom, P., 20 



Ground-i\^', see Glechoma hederacea 



— layer (field layer), 340, 342, 344, 440 

 • pines, see Lycopodineae 



— -shrubs, 327, 344, 347, 350, 392-5, 



410 



water, 301, 316, 374, 412, 546 



as agent of erosion, 543 



Groundnut, see Arachis hypogaea 

 Growing-points, 12 



season, 78, 315, 339, 403, 536 



Growth (general), 13 



form, 92-4 



inhibitor, 13 



ring (annual ring), 13, 146, 149 



348, 440 



— substances, 13 



Giioiaciim (Lignum-vitae), 247, 264 

 Guarana, 260 

 Guava, 258 

 Guayule rubber, 272 

 Guinardia, 516 

 Gulf of Aden, 443 



— of Mexico, 423 



— of St Lawrence, 338 



— Stream, 293 



— -weed, see Sargassum 

 Gullies, 418, 544, 568, 569, 570 

 Gully erosion, 309, 568, 569 

 Gum, 3, 272 



— arabic, 272, 274 



— tragacanth, 272 



tree, see Eucalyptus 



Guppy, H. B., 127 



Gutta-percha, 272 



Gymnodiniiim, 34 



Gymnospermae (Gymnosperms), 62- 



66, 67, 129, 145, 146, 450, 527 

 — , fossil, 138-50 

 Gypsiferous soil, 366 



Haberlandt, G., 95 



Habitat, 5, 6, 8, 9, 26, 29, 32, 38, 39, 

 313-22, 329, 472-9, 553, 563, 564. 



— preferences of birds, 116, 163 [577 



— requirements, 219, 565 



— tolerance, 8 



— (ecological) vicariad, 202, 204 

 Habitats of plant groups, 26, 27-8, 29, 



32, 33-4, 35, 38, 39, 41, 45, 47-8, 

 51, 54, 56, 57, 62, 65, 72, 283, 382, 

 434, 468, 544, 546, 550 



— formed by erosion, 544 



— of higher plants, 56, 57, 62, 65, 72, 



313 



— of lower plants, 26, 27-28, 29, 33-4, 



35, 38, 39, 41, 45, 47-8, 51, 54, 3i3 

 — , seemingly uniform, 9 

 — , similar, patterns of, 9, 329 

 Haden-Guest, J. K., 253 

 Haematotnma puniceum, 48 

 Haematoxylin, 274 

 Haemorrhages, treatment of, 265 

 Hail [see also Precipitation), 289 

 Haines, R. W., 102 

 Hairs, 82, ici, 102, 104, 366, 433, 451 

 Hakea, 83, 85 

 Half-barren, 285, 396, 397 

 Halophilous Grasses, 369, 371 

 Halophyte, 301, 368, 371, 399, 457- 460, 



474, 533 

 — , facultative, 368, 369, 370 

 — , desert, 365, 367, 368, 450 



— of inland waters, 365, 502 



— of spray zone, 527 

 Halosere, 324 

 Halosphaera viridis, 5 1 7 

 Hamamelis (Witch-hazel), 12^, 264 



