11; rothrockii (rothrock's G.}, 106 



Bracken. See Pteridium 



Bramble, 37. See also Rubus 



Braun-Blanquet, J., 81, 96, 126, 177, 

 179, 180 



Brazil, 68 



Bnza media (Quaking grass), 36 



Brockmann-Jerosch, H., 177 



Bromegrass, smooth. See Bromus 



Bromus (Bromegrasses) 



carinatus (mountain B.), 86; cath- 

 articus (rescuegrass), 92; inermis 

 (smooth B.), 22, 23, 34, 35, 38, 

 51, 97; marginatus (mountain B.), 

 46, 93; tectorum (downy chess, 

 cheatgrass, downy B.), 20, 47, 51, 

 73, 74,88,97, 101, 130, 131 



Bryophyte community, 68 



Buchloe dactyloides (Buffalograss), 11, 

 22, 23, 29,46,96, 102, 107, 110, 

 145 



Buckeye. See Aesculus 



Buffalograss. See Buchloe 



Bulrush association. See Scirpetum validi , 

 association 



Cactus. See Opuntia, Camegiea 



Cakile, 56 



Calamagrostis (Reedgrasses) 



montanenesis (plains R.), 84; neglecta, 

 16 

 Calamovilfa gigantea (Sandreed), 65 

 Calcification, 144 

 Cahfornia, 20, 26, 36, 45, 57, 58, 61, 



64, 68, 152 

 Calligonum comosum, 40 

 Calluna vulgaris (Scotch heather), 72, 



143, 144, 157 

 Calochortus aureus (Mariposa lily), 88 

 Caltha palustris (Marsh marigold), 87, 



95 

 Canada, 69, 73, 139 



British Columbia, 98, 99 



Quebec, 83 

 Canary' Islands, 43 

 Candolle, A. de, 176 

 Carbon scrub, 64 

 Carex (Sedges) 



bigelowii (Bigelow's S.), 17, 64; eleo- 



charis (needleleaf S.), 2?>; filifolia 

 (threadleaved S.), 44, 70, 84, 99, 

 144; misandra (short-leaved S.), 

 16; pennsylvamca (yellow S.), 24, 

 94; rupestris, 139; stenophylla 

 (needleleaf S.), 70, 84, 144 



Caribou, 63, 162 



Caricetum strictae association (Sedge 

 association), 180 



Carnegiea gigantea (Saguaro), 79 



Carotene, 111 



Carpetgrass (Axanopus compressus), 35 



Carpinus (Hornbeams), 162 



betulus (European H.), 181; carolini- 

 ana (blue beech), 83 



Carrying capacity, 110 



Cassia eremophila (Partridge pea), 36 



Cassiope tetragona (Four-angled moun- 

 tain heather), 36, 187 



Castanea dentata (Chestnut), 50, 51, 

 101, 142 



Cation-exchange capacity, 31 



Cattail marsh, 97, 140. See also Typhe- 

 tum association 



Ceanothus spp. (Bluebrush), 64 



Central America, 64 



Cerastium arctium (Arctic chickweed), 

 34 



Ceratostomella ulmi (Dutch elm disease), 

 62 



Cercis canadensis (Redbud), 83 



Cercocarpus montanus (Mountain ma- 

 hogany), 23, 185 



Cetrana (Lichens) 



cucullata, 63; islandica, 18, 63; nivalis, 

 18,61 



Chamaephyte, 94 



Change, classification of, 136, 163 



cyclic replacement, 21, 136, 144, 



145, 146, 153, 155, 162, 163, 165 



directional, 125, 136, 140, 146, 147, 



149-156, 159, 163, 164, 165, 166 



fluctuation, 136, 146-148, 159, 162, 



163, 165, 166, 167 

 in space, 136, 139, 156-158, 163 

 in time, 135, 140 

 intercommunity cyclic, 145, 146, 



155, 163, 165, 166 

 intracommunity, 145 



Inde3 



205 



