INDEX 
Columella, in Anthoceros, 378*; in 
Anthocerotales, 379 
Combustion, source of energy of, 48-49 
Commelina (Wandering Jew), root of, 
191* 
Companion cells in dicotyledons, 124 
Comparative morphology, 261-263 
Complementary factors, 242-244 
Compositae, 219-220, 290 
Compound leaves, 78, 91-92 
Compounds, 9 
Concentric bundle in ferns, 385- 388 
Conducting cells in leaf, 38 
Conducting system in leaf, 36-37 
Conduction of food and water by 
parenchyma, 119, 122, 126 
Cones, of Agathis, 421* ; of Coniferales, 
421; of Cycadales, 407 —408; of Cycas, 
410%: of pine, 422-424, "426% + of 
Zamia floridana, 411* 
Coniferales, alternation of generations 
in, 427; distribution of, 427-428 ; and 
Ginkgo, 417; leaves of, 420; pine, 
421; relationship of, 427 ; sporangia 
of, 421; stems of, 1338-134, 420-421 
Coniferous forests, 443-444 _ 
Conjugatae, 337 
Conjugation, 335-337 
Conservation of energy, 48 
Continuous variations, 248-249 
Copal, 421* 
Coral tree (Erythrina fusca), wood of, 
149%, 151* 
Corallopsis salicornia, 342* 
Cordaitales, 427; and Ginkgo, 419 
Cordyline terminalis, flower of, 210* 
Cork, 17, 153; in Ixora, 153* ; in ole- 
ander, 152* 
Corms, 172, 173* 
Corn, 13, 14, 115, 207, 218, 278, 291 ; 
bundles in, 182-133 ; complementary 
factors in, 242-244 ; germination of, 
298% ; hybrid vigor in, 253% ; - Indian, 
2138, 215 ; self- fertilization in, 254— 
255 : starch erains of, 45* 
Corn smut, 354*, 356 
Cornstarch, 289 
Corolla, 5, 205, 207, 209 
Cortex, of dicotyledonous stems, 115, 
116-120; of root, 193-196 ; of root, 
passage of water through, 183 
Cosmarium, 338* 
Cosmos, 219-220; achene of, 277* 
Cotton, 74, 284; cellulose, 16 
Cotyledons, 115, 279 ; in germination, 
801-303 ; of pine, 425, 427 
469 
Cowitch (Mucuna pruriens), bristlelike 
hair of, 75* 
Cross-pollination, 214 
Croton tiglium, cells from seed of, 294* 
Crystals, calcium oxalate: raphides, 
32-33 ; rosette, 31*, 32 
Cucumber, 14, 279; berry of, 279* 
Cucurbita maxima (squash), sieve plate 
of, 121*; tendril of, 167* 
Cultivation, 189 
Cumulative factors, 244-246 
Cuscuta, 170*, 171% 
Cuticle, 28; in cell walls, 17 
Cuticular transpiration, 55 
‘Cutin, 17, 28 
Cuttings, 88, 107, 204-205, 256 
Cyanophyceae (blue-green algee), 312- 
510% cell. structure of, 312-313: 
distribution of, 314; and Flagellata, 
318 ; in lichens, 366 ; relationship of, 
314-315 ; reproduction in, 318-314 
Cyathea (tree ferns), 385* 
Cyathus striatus (bird’s-nest fungus), 
361% 
Cycadales, 407-417, 425, 427; alterna- 
tion of generations in, 411, 415, 415 ; 
male prothallus and fertilization of, 
409-410 ; megasporangium and _ fe- 
male prothallus of, 409; relationship 
of, 415-417; seed of, 410-411 
Cycadofilicales, 415-416, 427 
Cycads and conifers, 427-428; and 
Gingko, 417; megasporophylls of, 
408* ; and pine, 428, 425. See Cyca- 
dales 
Cycas chamberlainii, trunk of, 407* 
Cycas circinalis, megasporophyll of, 
408* ; pollen tube of, 415* 
Cycas revoluta, 417; megasporophyll 
of, 408* 
Cycas rumphii, 406* ; megasporangium 
of, 410*, 418* ; megasporophyll of, 
408*, 409*; microsporophylls of, 
410* ; pollen grains and tube of, 415* 
Cyclophorus adnascens, stele of, 387* 
Cylinder of Coniferales, 420-421 
Cymbidium finlaysonianum (orchid), 
capsule of, 282* 
Cyperus flabelliformis (umbrella plant), 
105* 
Cytoplasm, 20 
Dahlia, 14; inulin in root of, 290* 
Daisy, 219-220 
Darwin, vata 
Davallia solida, vascular bundle of, 384* 
