INDEX 



635 



Triassic flora, 149 



— landscape, reconstruction of, 150 



— period, 129, 133, 145, 149 

 Trichamphoro, 42 

 Trichodesmium erythraeiim, 317 

 Trifolium (Clover), 234, 259 

 Tnglochin tnaritima (Sea Arrow-grass), 



369 

 Trinidad, 426 

 Tripe de Roche, 410 

 Tripton, 480 

 Tritiaim vulgare etc. (Wheat), 115, 223, 



224, 226, 255, 257, 282, 454, 



541, 564, 576 



, Stem-rust of, 248, 251 



, world production of, 227, 229 



Triumfetta, 113 

 Triuridaceae, 436 

 Troms, 347 

 Tropic of Cancer, 423, 424 



— of Capricorn, 423 

 Tropical America, 243, 247, 261 



— Agriculture series (Longmans), 282 



— (arid area) biological spectrum, 95 



— beach vegetation, 458 



— cash crops, 282 



- — climate, 1 1, 424 



■ — desert, 449-54 



• — discontinuous range (distribution), 



193.. 1 94 



— edaphic etc. communities, 460-7 



— forest, 350, 423-43, 454-70 

 , disappearance of, 424 



with seasonal rhythm, 332, 439-43 



, stratification of vegetation in, 



425-31, 434. 438, 440, 462 



468-9 



— grassland climate, 444 



— grasslands, 443-7 



— hardwoods, 246-7 



— humus, 325, 437, 462, 467 

 — • hydrosere, 462, 463, 464 



— littoral woodland, 458, 460 



— (moist area) biological spectrum, 95 



— ' moor-forest ', 462, 463 



— rain forest, 332, 339, 379. 423- 



39 



, components of, 425-38 



, epiphytes of, 431-5 



, geographical location of, 423, 



424 



— — , herbs in, 430 



, precipitation on, 424 



, stratification in, 425-31, 434 



— reed-swamps, 461 



— region, 10, 22, 323, 423, 529 



— savannas and other grasslands, 443-7 



— seashore vegetation 454-60, 461, 



464-5 



— seasonal forest, 439-41 



— seaweeds, 458, 529-30 



Tropical serai communities, 460-7 



— swamp, 314, 460-2 



— thorn-forest (woodland), 442, 443 

 parkland, 443 



— vegetation, 423-71 



Tropics, altitudinal effects in, 467 70 



— , arctic species in, 413 



— , peat rare in, 462 



Trout, 476 



True-breeding polyploid hybrids, 235, 



239 

 Truffle, 259, 282 



Tstiga (Hemlock), 174, 246, 269, 274 

 T. canadensis (Hemlock), 341, 349 

 Tuber, 69, 93, 355, 446 

 Tuberculosis, 26, 279 

 Tufted hemicryptophyte, 94 

 Tulip-tree, see Liriodendron and L. 



titlipifera 

 Tulipa uni flora, 366 

 Tumble-weeds, 102, 452 

 Tumboa, see Wekcttschia niiiabilis 

 Tundra, 174, 213, 246, 292, 300, 315, 



332, 333, 348, 380, 384, 385, 386, 



388, 389, 410, 417, 419 

 — , alpine, 377, 383, 410, 414 

 — , arctic, 382-3, 384, 385, 386-90 

 — , dominants of, 383-4, 385, 386-9 

 — , dry, 385, 386, 387, 389, 392 

 — , grassiness of, 383, 384, 388 

 — , high-arctic, 387, 388, 389 

 — , hillock, 385, 387, 388 

 — , interaction of factors in, 386-7 

 — , Kerguelen Island, 419 

 — , low-arctic, 383, 384, 385, 386 

 — , marshy, 385, 387, 390 

 — , middle-arctic, 387, 388 

 — , Pleistocene, 162 



— soils, 298 



— , subantarctic, 417, 419, 421 



— vegetation, 383-9 

 Tung, see Aleiirites 



— oil, 265 

 Tunnels, 546 



Turbidity of water, compensation point 

 and, 519 



, light penetration and, 473, 5 1 1 



Turbulence, sedimentation and, 480, 



. 525 



— in water, plankton and, 480, 514 

 Turf, 360, 362, 363-4, 369, 390, 403, 



421 

 Turgor adjustments in Diatoms, 508 

 — , variable, 508 

 Turkish Oak, 274 

 Turmeric, 262, 274 

 Turn-over in lake water, 473, 477 



481-2 

 Turnip, see Brassica campestris 

 Turpentine, 268, 273 

 Turrill, W. B., 21 



