GENERAL INDEX 
pollination, 167; shade cast by, 
272 
Beechwood-association, 229, 272 
Beer, 20, 151 
Bees, 172, 173, 174 
Beet, fleshy root, 150; sugar in, 
146 
Beetles, pollination by, 172, 174 
Begonia, vivipary, 160 
Belladonnin, 143 
Belt on myrmecophily, 133 
Berberis vulgaris spines, 140, *141. 
See Barberry 
Berry, 136, 192, 193, 196 
Beverages, 151 
Bibliography, 231, 232 
Bidens, 59 ; fr., *197 
Biennials, 58, 60, 108 ; leaves, 115; 
tuberous roots, 111; xerophytic 
chars. of, 60 
Bilberry, acids in, 143 
Bindweed, 217 
Biological classifications, 105 ; habi- 
tats, 223, 225 
Biology, 7104, 184 
Birch, 22; bud-scales, 61; com- 
petition with the oak, 270, 271; 
infl., 180 ; pollination, 167 
Birchwood-association, 229, 271 
Birds : migratory, 198; as pollinators, 
176; as seed-distributors, 196, 
198, 209, 211, 213, 233; water-, 
233 
Bird’s-foot trefoil, 
ules, *95. 
latus 
Bird’s-nest orchid. See Neottia 
Bird’s-nest, yellow. See Monotropa 
Hypopitys 
Birthwort, 218. See Aristolochia 
Bitter principles in pls., 136, 139, 
142 
217 ; 
Blackberry : bud-scales, 61; fr., 192. 
root-nod- | 
See Lotus cornicu- | 
See Rubus fruticosus and "Bramble | 
Black bryony. See Tamus 
munis 
com- 
Black horehound. See Ballota nigra | 
| Cabbage (Brassica oleracea), 150 
oo medick. See Medicago lupu- 
ina 
Blackthorn. See Prunus spinosa 
Bladderwort. See Utricularia 
Bluebell, 228 ; fr., 187 
Bog-associations, 246; Carex, 231; 
Juncus, 231; Molinia cerulea, 
231, 250, 251; Myrica, 231, 250, 
253 ; Sphagnum, 231, 250 
Bog-moss. See Sphagnum 
301 
Bogs, 240, 246 ; insectivorous pls. in, 
131; xerophytic factors of, 35 
| Boulder-clay, 80 
Box, 39 ; leaf-form, 43 ; leaf-mosaic, 
68 ; pollination, 176 
Bracken, 89, 228 
Bracts, 181, 194 
Bramble, 220, 221; honey, 173; 
prickles, 141. See Rubus fruti- 
cosus and Blackberry 
Brandy, 151 
Brassica, 216 
Brazil-nut, 146 ; oil in, 143 
British Isles: agriculture, 19; 
mate, 12 
Broceoli, 150 
Bromus arvensis, 216 ; mollis, 60 
Brood-buds, 161 ; in aquatics, 54 
Breom, 44, *45, 89, 152,220; honey, 
171; pollination, 169, 171. See 
Cytisus scopartus 
Broomrape. See Orobanche 
Brussels-sprouts, 150 
Bryonia dioica, 214; berries, 149 ; 
pollen-flower, 171 ; tendrils, 119 
Bryony: black (see Tamus com- 
munis); white (see Bryonia dioica) 
cli- 
Buckthorn, 152 
Bud-detachment. 161; -protection, 
60 ; -scales, 61; -variation, 153 ; 
winter-buds, 60 
_ Bulbils, 62 ; repr. by, 160 
| Bulbs, 62, 111, 115, 143, 161; 
multiplication by, 156 
Bull’s-horn acacia. See Acacia 
cornigera 
| Burdock, 60, 108 ; fr., 197 
Bur-marigold. See Bidens 
Bush-communities, 17 ; -swamp, 243 
Butcher’s-broom, 214 ; phylloclades, 
44, *45 
| Buttercup, 218; fr., 187; honey, 172; 
hydathodes, 28; nectaries, 169, 
*170 ; seed, 146 
Butterflies, 170, 173, 174 
Caatinga forests, 10 
| Cacti, 9, 165 
| Cakile maritima, 59 
| Caleareous marl, 82; rocks, 82; 
soils : pastures on, 272, woods on, 
272 
Calceolaria pollination, 171 
Calcifuges, 89, 260 
Calciphilous pls., 89 ; list of, 260 
Calcium oxalate, 142, 143 
