INDEX 



593 



Climograph, 576 



Cline, 183, 202 



Clip quadrat, 567 



Clone, 576 



Closed community, as barrier to migra- 

 tion, 126, 161, 165 



Clothing materials, 270—1 



Cloudiness, 10, 288 



Clove, 262 



Clover, see Trifolium 



Club-moss, see Lycopodium 



mosses, see Lycopodineae 



root, 43 



Clusia, 436 



Co-dominant, 329, 331-2, 351, 367,428, 



Coaction, 324 [463 



Coal, 59, 136, 146, 271 



Coal Age, 146 



Coal-forest, 138, 141 



Coastal Redwood, see Sequoia semper- 

 virens 



Coca shrub, 263, 267 



Cocaine, 263, 266, 267 



Coccolithophores, 518 



Cochlearia officinalis s.l. (Scurvy-grass), 



Cockayne, L., 379 [399> 401 



Cockroach plant, 276 



Cocoa (see also Theobroma cacao), 243, 



— butter, 266 [260, 282 

 — , world production of, 244 

 Coconut, see Cocos niicifera 



— oil, 235, 266 



Cocos nucifera (Coconut), 107, no, 235, 



242, 258, 282, 460, 461 

 Coenopteridales, 138, 145 

 Coffea (Coffee), 243, 260, 282 

 — , cultivation in Brazil, 243 



— Rust in Ceylon, 251 



— , world production of, 245 



Coir, 270 



Coke, 271 



Cola (Cola), 260 



Cola nut, 266 



Colchicine, 264 



Colchicum, 264 



Cold, 8, 77, 78, 284, 365 



— deserts, 316, 414 



— resistance, 77, 100 



— springs, population of, 499 

 — , survival in, 77, 78, 99, 100 

 water Fishes, 476-7 



Colds and hay-fever, treatment of, 264 

 Coleochaete, 500 

 Collective species, 222 

 CoUenia undosa, 130, 131 

 Colobanthiis crassifolius, 417 



C. kergiielensis, 419 



C wuscoides, 420 

 Colocynth, 263 

 Colombia, 414, 423 

 Colonies, algal, 28, 29, 30, 31, 33 



Colonization, 6, 48, 81, 504, 505, 548 

 Colony, plant, 324, 334, 375, 430 

 Colorado, 295, 361, 362 

 Coloured snow, 490 

 Columbus, C, 181, 266 

 Comatricha, 42 



Common Adder's-tongue, see Ophio- 

 glossum vulgatiim 



— Bean, see Phaseolus vulgaris 



— Chickweed, see Stellaria media agg. 



— Dandelion, see Taraxacum officinale 



s.l. 



— Heather, see Calluna vulgaris 



— Mare's-tail, see Hippuris vulgaris s.l. 



— Pea, see Pisum sativum 



— Polypody, see Polypodium vulgare 

 agg. 



— Reed, see Phragmites communis agg. 



— Timothy, see Phleum pratense 

 Community, animal, 16, 17 



— , biotic, 15, 304 

 — , plant, 6, 7, 14, 17, 23, 283, 331-5 

 Compensation point, 475, 512, 519 

 Competition {see also Root-competition) 

 81, 98, 126, 20I, 220, 302, 324, 349 

 — , alien plants and, 120, 126, 221 

 — , cultivated plants and, 216, 310, 564 

 — , general consideration of, 81 

 — , harsh environment and, 381 

 — , natural selection and, 562 

 — , optimum conditions and, 302 



— of seedlings, 103 



— of smother crops and weeds, 248, 280 



— among trees, 428 



— between trees and Grasses, 307, 360 

 — , weak in open habitats, 163, 310, 374 

 — , weeds and, 248, 322 

 Component factors, reaction to, 9 



■ — landforms, landscapes and, 541-3 

 Compositae (Daisy family), 80, 99, 276, 

 — , toxic root-excretions of, 80 [366 

 Condiments, 261 

 Condition, biotic, 8 

 Conditions of environment, 8, 9 



, arctic, 315, 380-2 



, marine Algae and, 508-27 



— unsuitable for cereals, 23 1 

 Cone, 57, 66, 67 



scale, 63 



Congo, closed forests of, 444 

 Coniferae, Coniferales, see Conifers 

 Coniferous forest, 246, 328, 330, 333, 



343-50- 470, 548, 574 

 Conifers, 62, 63, 65, 66, 67, 73, 141, 145, 



146, 292, 341, 343-51. 357, 470, 

 — , austral, 345, 353, 354 [563 



— , bogs and, 500 

 — , boreal, 343-6, 347, 348 



— in Central America, 345 



— cultivated in Europe, 243, 246 

 — , distribution of, 345, 346 



