GENERAL INDEX 
Contractions employed: chars. = characters; fl. = flower; fr. = fruit ; 
infl.=inflorescence ; pl.—plant ; repr.=reproduction ; var.=variety ; veg. 
=vegetation. 
Signs employed : * illustration ; + derivation given. 
Absorption of water : by roots, 25, 33, 
74, 91; causes reducing, 32, 33, 
35 ; selective, 91; by soils, 87 
Acacia, phyllodes, 44; cornigera, 133; 
false (see Robinia pseudacacia) 
Acclimatization of plants, 75 
Achenes, 137, *+186, *195, *197 
Acids in plants, 143 
Aconitin, 143 
Aconitum Napellus, 143 
Acorn: fr., *187; seed, 146; pro- 
tection of fr., 136, *137 
Actinic rays, 65, 67, 73 
Adoxa, 62 
Aigopodium Podagraria, 216 
Aeration : of soil, 88 ; by earthworms, 
96 ; of water, 52 
Aérobie bacteria, 93 
Aithusa cynapium, 216 
Afforestation and climate, 13 
Agave: source of alcohol, 151; 
americana, 113 
Agriculture in British Isles, 19 
Agrimony fr., 197 
Air: chemical effects of, 6; in 
aquatics, 48, 52 ; composition of, 
6 ; dry, 34, 35 ; physical effects of, 
8, 76 ; rarefied, 34, 35 
Aira flexuosa : habit, 115 ; preecox, 60 
Air-spaces: in aquatics, 47, *48 ; in 
leaves, *26, *27; in marsh-plants, 
. 63; in xerophytes, 40 
Albumin, 5 
Albuminous seeds, *146, *147 
Alcohol, 151 
Alder, infl., 180 
Alder-thickets, 229, 243, 269 
Aleurone-grains, 146 ; -layer, 147 
Alge, colour of, 53 
Aliens, 215 
Alisma Plantago, leaf-form, 50 
Alkaloids, 143 
Allium vineale, bulbils of, 160 
Alluvium, 80 
Almonds, bitter, seeds of, 138 
Aloe, American. See Agave ameri- 
cana 
Alopecurus agrestis, 216 
Alpine: flora, 210; pasture, 230, 
251; plants, 36, 37, 38, 72, 74, of 
Ireland, 286, 288, Scotland, 287, 
British Isles, 288; regions, 35; 
rocks, 286; vegetation : summit- 
heath, 251, vaccinium-moor, 255, 
pasture, 259, rocks, 286 
Altitude : influence on climate, 11; 
on veg., 21 
Alumina, silicate of, 87 
Ammonium compounds produced 
by bacteria, 95, 124 
Ampelopsis Veitchii tendrils, 118, 
*119 
Amphibious plants, 28, 56 
Anaerobic bacteria, +93 
Andrena, 171 
| Anemophilous fls., +166 
Angiosperms, +163, 183 
Animals ; food of, 5,79; and plants, 
79 ; and seeds, 196 
Aniseed oil, 151 
Annuals, 107, 145 ; aquatic, 54, 55, 
236 ; autumn-, 59, 107; garden-, 
108 ; hygrophytic, 59; marsh-, 
59, 240 ; mesophytic, 60 ; seaside-, 
58, 59, 277, 280; summer-, 107 ; 
tropophytic nature of, 59 ; weeds 
of cultivation, 108, 215 
Anther, 162 
299 
