INDEX 



373 



Cell, enlargement of, 141, 144 



maturation of, 142, 144 



plate, 141 



size, constancy of, 138 



theory, 6 



wall, 44, 45, 139 

 Cells, of wood, 100, 101 



production of new, 139-142 

 Cellulose, 45, 120, 124 

 Centrifugal force, as substitute for 



gravity, 162 

 Cephalanthus, flower of, 363 

 Cercis, living and fossil species of, 



230 

 Cesalpino, 5 



Chamomile, flower of, 366 

 Char a, 277 

 Charales, 277 



Chemical substances, as environ- 

 mental factors, 168 

 Cherry, flower of, 189 



twigs of, 93 

 Chinese primrose, flower of, 195 

 Chlamydomonas, 247, 268 

 Chlorophyceae, 266 

 Chlorophyll, 19, 67, 70 

 Chloroplast, 67, 68, 70 

 Choke cherry, 362 

 Chromatin, 140 

 Chromatophore, 267 

 Chromosome, 139, 140 



number, 140 



reduction, 186, 187, 188, 217, 251 

 Cilia, 267 



Circaea, pollen of, 186 

 Classical Period, 4 

 Classification, based on relationship, 

 256 



natural, 257 



of plants, 256 



units of, 259 

 Club mosses, 334 

 Cobaea, pollen of, 186 

 Coccus, 285, 286 

 Coenocyte, 272 

 Cohesive power, of water column, 



112 

 Coleochaete, 271, 272 



Columella, in RMzopus, 289 

 Combustion, compared with respira- 

 tion, 126 

 Companion-cell, 98, 99, 356 

 Compound leaf, 64 



ovary, 190 

 Conceptacle, of Fncns, 280, 281 

 Cone, 335, 347, 351, 352, 353, 354 

 Confervales, 270 

 Conferva-like algae, 270 

 Conidia, 292 

 Coniferales, 351 

 Conifers, 351 

 Conjugales, 274 

 Conjugating tube, 274, 275 

 Cork cambium, 148 

 Corky bark, 94, 96 

 Corm, 93, 95, 184 

 Corn, kernel of, 199 



starch grains of, 120 



stem of, 103 

 Corolla, 187 

 Cortex, of root, 43, 46 



of stem, 95, 96 

 Corydalis, pollen of, 186 

 Corymb, 193 



Cotton-grass, fruit of, 200 

 Cotyledons, 198, 199 

 Crataegus, 16 

 Crocus, corm of, 95 

 Cross, 194 



Cross-fertilization, 198 

 Cross-pollination, 194 

 Crumbs, of soil, 24 

 Crust, on soil surface, 28 

 Cube of wood, in three planes, 108 

 Cucurhita, pollen of, 186 

 Cup fungi, 293 

 Cuscuta, as parasite, 171 

 Cuticle, 65 



Cuttings, reproduction b\', 182 

 Cyanophyceae, 265, 266 

 Cycadales, 349 

 Cycad-ferns, 349 

 Cycadofilicales, 349 

 Cycads, 349 

 Cycas, 349, 350, 351, 352 



stonui of, 165 



