GENERAL INDEX 



Contractions employed : chars. = characters ; fl. = flower ; fr. = fruit ; 

 infl.=infloresoenoe ; pl.=plant; repr. = reproduction ; var. = variety ; veg. 

 = vegetation. 



Signs employed : * illustration ; t derivation given. 



Absorption of water : by roots, 26, 33, 

 74, 91 ; causes reducing, 32, 33, 

 35 ; selective, 91 ; by soils, 87 



Acacia, phyllodes, 44; comigera, 133; 

 false (see Bobinia pseudacacia) 



Acclimatization of plants, 75 



Achenes, 137, *tl86, *195, *197 



Acids in plants, 143 



Aconitin, 143 



Aconitum Napellus, 143 



Aeoin : fr., *187 ; seed, 146 ; pro- 

 tection of fr., 136, *137 



Actinic rays, 65, 67, 73 



Adoxa, 62 



JEgopodium Podagraria, 216 



Aeration : of soil, 88 ; by earthworms, 

 96 ; of water, 52 



A6robic bacteria, 93 



jEthrisa cynapium, 216 



Aflorestation and climate, 13 



Agave : source of alcohol, 151 ; 

 americana, 113 



Agriculture in British Isles, 19 



Agrimony fr., 197 



Air ; chemical efiects of , 6 ; in 

 aquatics, 48, 52 ; composition of, 

 6 ; diy, 34, 35 ; physical effects of, 

 8, 76 ; rarefied, 34, 35 



Airaflexuosa : habit, 115 ; prmcox, 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 



AlgSB, colour of, 53 



311 



Aliens, 215 



Alisma PlarUago, leaf-form, 50 



Alkaloids, 143 



Allium vineaie, 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, vacoinium-moor, 255, 

 pasture, 259, rocks, 286 



Altitude : influence on climate, 1 1 ; 

 on veg., 21 



Alumina, silicate of, 87 



Ammonium compounds produced 

 by bacteria, 95, 124 



Ampelopsis Yeitchii tendrils, 118, 

 *119 



Amphibious plants, 28, 56 



Anaerobic bacteria, t93 



Andrena, 171 



Anemophilous fls., ^166 



Angiosperms, tl63, 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 



