INDEX 



References in heavy type are to illustrations. For international understand- 

 ing and accuracy, scientific {italicized Latin) plant names are chiefly used, the 

 English or other equivalents being cross-referenced to them. The full extent 

 of such vernacular names is indicated in both text and index by Capitalization 

 of Initial Letters, the name-sequence being retained in the index — usually 

 without cross-referencing. Thus ' Mountain Sorrel ' will be found so listed 

 (and there referred to its Latin name, Oxyria digyna), and not under ' Sorrel, 

 Mountain '. Other listings are generally treated similarly. To obviate the 

 need of a glossary, technical terms are listed in the index and explained in the 

 text — usually on introduction. Often, too, they are illustrated. 



' A ' stratum in tropical forest, 425 



' A ' zone in soil, 297, 299 



Abaca, see Musa 



Abies (Fir), 343, 345, 376 



A. bahamea (Balsam Fir), 346 



A. concolor (White Fir), 376 



A. lasiocarpa (Alpine Fir, Subalpine 



Fir), 346. J76 

 A. sibirica (Siberian Fir), 346 

 A. spectabi/is, 295 



Absolute relic, 200 



Absorption of solutions, 12 



Abyssal-benthic zone, 512, 513 



Abyssinia, 253 



Acacia (Wattle), 247, 274, 275, 318, 



358, 441, 443. 446, 447 

 Acaena, 417, 419, 420 



A. adscendens, 419-21 

 Acanthaceae, 124 

 Acanthosicyos horrida (Desert Melon), 



.450 . 

 Acclimatization, 81, 176, 219, 220, 563 

 Accretion, 369 



— /erosion balance, 369 



Acer (Maple), 68, 102, 105, 246, 268, 



340, 341, 343 

 — , fruit of, 105 



A. campestre (Field Maple), 340, 342 

 A. saccharttm (Sugar Maple), 269, 

 308, 341 

 Acetabularia, 528 



A. acetabula {A. mediterranea), 530 

 Acetic acid, 268 

 Acid (acidic) soils, 303, 318, 359, 373-4 



— water, microflora of, 478, 501 

 Acknowledgements, xvii-xix 

 Acoriitum (Aconite, Monkshood), 264 

 Acorn, 258 



Aconis calamus (Sweet-flag), 275 

 Adamson, R. S., 573 

 Adansotiia di^itata (Baobab), 446 



Adaptations, 7, 16, 75, 82, 93, 94, 97, 

 128, 449-52, 562-3 



— structural, 81-91, 432-4 

 — , vegetational, 81, 565-6 

 Adaptive response to environment, 16 

 Adder's-tongue, see Ophiog/ossiim viil- 



gatiim 

 Adiantiirn caitdatiim (Walking Fern), 



89, 121 

 Adjustments, man-made, 7, 563-4 

 Adlittoral zone, 527 

 Adverse conditions, survival in, 78 

 Aeiiiropiis littoralis, 370 

 Aerating roots (pneumatophores), 455, 



456, 461, 463 

 Aeration, 86, 87, 298, 305, 343 



— in water, 317, 319, 461, 473, 474, 506 

 — , features promoting, 86, 87 



— , internal, 86, 87, 505-6 



— of soil, 302, 305, 501 

 • — , root-growth and, 82 

 Aerenchyma, 87, 505, 506 



Aerial roots, 433, 434, 435, 436, 470 



Aeroplankton, 316 



Aescidtis (Horse-chestnut), 343 



Aesthetics, 277 



Afliorestation, 7, 566 



Africa, 148, 156, 187, 196, 229, 233 



235, 239, 260, 446 

 — , forest area of, 246, 247 

 — , monsoon forest in, 439 

 — , origin of flora, 171 

 — , savanna in, 444 

 — , savanna-woodland in, 442 

 — , semi-desert scrub in, 447 

 — , thorn-woodland in, 443 

 — , tropical rain forest in, 423 

 African Mahogany, see Khaya sene- 



galensis 



— Oil Palm, see Elaeis guineensis 

 Agar, 41, 259, 265 



58^ 



