GENEEAL INDEX 



31.5 



according to : frequency of seed- 

 ing, 112, longevity, 107, mode of 

 growth, 114, mode of nutrition, 

 123. water, 28, 64 



Clay, 82 ; absorptive poWer, 87 ; 

 origin, 81 ; permeability, 87 ; 

 physical properties of, 82, 90 ; 

 relation to water, 92 ; water- 

 capacity of, 87 J water-retaining 

 capacity of, 87 



Clayey loam, 82 



Claytonia, 215 



Cleavers, 60, 197. See Galium 

 Aparine 



Cleistogamous fls., tl65, 275 



Clematis Viialba, 214, 217 ; fr., *195; 

 pollen-flower, 108 ; tendrils, 119 



Cliffs, veg. of, 283 



Climate, 9 ; effect on veg., 15 ; types 

 of, 12 ; relation of soil to, 84 



Climatic factors, 9 ; types of veg., 16 



Climbers, root-, 119 ; stem-, 114 ; 

 tendril-, 120 



Climbing habit, evolution of, 120 



Climbing lily. See Oloriosa swperba 



Climbing plants, 115 ; habitat of, 

 119 ; leaf-mosaic, 68 ; of the 

 hedgerow, 293 ; of woods, 267. 

 See also Ovscuta, 128 



Clouds, effect on climate, 13 



Glover, 20 ; infl., 179 ; root-nodules, 

 95 ; sleep-movement of leaves, 

 70 ; white, insect- visitor, 171, 174. 

 See Trifolium repem 



Cloves, 151 



Clubmoss, *46 



Coal, S3 



Coccus, 190 



Cock's-Ioot, 217 



Cocoa, 151 



Coco-butter, 148 



Coconut, source of alcohol, 151 ; oil, 

 147, 148 



CoHee, 151 



Cdchicum autumnale, 159 



Cold : effect on absorption of water, 

 33 ; effect on pis., 73 ; effect on 

 formation of humus, 83 



Colonists, 215 



Colonization : of islands, 208 ; of 

 British Isles, 209 ; of Ireland, 214 



Colour-adaptations, in algse, 53 



Colour of young leaves and shoots, 

 73 



Coltsfoot, 62 



Columbine, position of honey, 173 



Colza-oil, 148 



Combustion, 78 



Commons, 271, 296 ; veg. of, 296 



Competition among pis., 4, C5, 203, 

 208, 210 



Composite : infl., 181 ; self-pollina- 

 tion in, 177 ; slcop-movements in 

 flower-heads, 71 ; unisexual fls., 

 176 ; insect- visitors, 170 



Concrescent type of leaf, *39, 42 



Condiments, 151 



Cones of pine, 184 



Coniterous forest-belt, 22 ; woods, 

 250 



Conifers : pollen, 167 ; seeds, 183 ; 

 dispersal of seeds, 196 



Continental climate, 12, 23 ; islands, 

 207 



Convolvulus : nectaries, *169 ; se- 

 nium, climbing plant, 116, * 117, 

 insect- visitor, 171 



Copper-beecli, origin of, 205 



Coppicing : effect on leaf-fall, 109 ; 

 on veg. of woods, 268 



Copses, 268 



Corallorhiza innata, saprophyte, 124, 

 *125 



Coral-root orchid, 217. See Coral- 

 lorhiza 



Corli, 41, 60, 61, 140 



Corms, 62, 63, 111 ; multiplication 

 by, 161 



Corn-bluebottle, 216 ; -buttercup, 

 60 ; -cockle, 216 ; -marigold, 216 ; 

 -spurrey, 60 



Corolla, 162 



Cortex, *45 



Corydalis daviculata, evolution of 

 tendril, 120 



Corymb, *179 



Cotton-grass, 217. See Eriophorum 



Cotton-grass association, 232 



Cotton-grass (Eriophorum) moor, 

 231, 250, 251, 252, 253, 254, 255 



Cotton-seed oU, 148 



Cotyledons, storage of food in, 146 



Couch-grass, 62 ; rhizomes, ♦llO, 

 154 



Cow-wheat. See Mdampyrum 



Cranberry, citric acid in, 143 



Crane's-bill. Sec Geranium 



Gratcegus Oxyacantha, thorns, 140. 

 See Hawthorn 



Creeping Jenny, 156 ; stems, 156 



Criihmum maritimum, 59 



Crocus, 62, 115, 215 ; structure of 

 corm, *158 ; autumn- (see Gd- 

 chicum autumnale) 



