286 



INDEX. 



centage, 46; principles of diffu- 

 sion, 47; aeration of the plant 

 body, 47, 48, diffusion through 

 cell wall, 48, 49; stomata, 49; 

 Stahl's test, 49; conditions for 

 absorption, 50; for elaboration, 

 50 ; rate of diffusion, 50 



Carnivorous plants, 81; bacteria as- 

 sociated with, 83 ; enzymes, 83 



Carotin, 52 



Cell-division, relation to growth, 165; 

 relation to gravity, 198, 199 



Cell-sap, active agent in absorption, 

 106; density and composition, 

 how maintained, 111, 112 



Chasmogamy, 274, 275 



Chemical fertilization, 230, 231, 260 



Chemical stimuli, 226, 237 ; conditions 

 of influence, 227 



Chemotaxis, 233-237 



Chemotropism, 231-233, 236, 237, 245 



Chlorophyll, location, 51; physical 

 characteristics, 51; mixture of 

 pigments, 51; associated pig- 

 ments, 51; carotin, 52; solvents, 

 52; fluorescence, 53; spectrum, 

 53 ; absorption bands, 53 ; amount 

 of light absorbed, 54; efficiency 

 of chlorophyll screen, 55; pro- 

 portion of light absorbed, 55; 

 amount, 55; dependence upon 

 iron, 57, 58, 101; upon light, 57; 

 in guard ceils of stomata, 147 



Chlorophyll grains or granules, see 

 Chromatophores 



Chloroplastids, see Chromatophores 



Chlorosis, 101 



Chloro vaporization, 137 



Chromatophores, body and pigment, 

 57; photosynthesis in isolated 

 Chromatophores, 57; position af- 

 fected by light, 217, 218. See also 

 Chlorophyll 



Circumnutation, 246 



Cleistogamy, 272, 274, 275 



Climate, continental and island, 220, 

 221 



Colloids, 129 



Colored screens, 56 



Common salt, 93, 227 



Comparison of photosynthetic and 

 respiratory activities, 65 



Conditions essential to life, 6 



Conducting tissues, 156, 157 



Contact, irritation by, 239-251; ef- 

 fect 011 amount of growth, 240, 

 241 



Correlation, 251, 252 



Corrosive action of roots, 125 



Crystalloids, 129 



CUSCUTA, 88-90.. 244-246 



Cytoplasm, ratio between, and nu- 

 cleus, 181 



Cytoplasmic membranes, 106 



D 



Dew, 128 



Diastase, 64 



Diffusion, principles of, 47; rate of 

 CO 2 diffusion through minute 

 openings, 50 ; physics of, 108 



Dissociated atoms, effect of, 228, 229 



Dodder, 88-90, 244-246 



DROSERA, 82, 83 



E 



Ecology, 252, 253 



Ectoplast, 106 



Electricity, 237-239; influence on 

 amount of growth, 238; on ger- 

 mination, 239; on direction of 

 growth, 239; on locomotion, 239 



Energy, need of, 12 



Engelmann's bacteria method, 56 



Enzymes, formed in connection with 

 respiration, 19, 29, 30, 33; zy- 

 mase, 33; diastase, 64; effect of 

 light on, 209, 210; in carnivorous 

 plants, 83 , 



EQUISETUH, reproduction, 276 



Excretion, by roots, 125; of water, 

 126-128 



Exercise, advantage of, 191 



