290 



INDEX. 



Reproduction, Chapter VII., pp. 

 254-383; chief end, 257, 258; defi- 

 nition, 257; modes, 259; sexual, 

 259, 271, 272, 275-279; non-sex- 

 ual, 259, 277-379; precautions to 

 secure, 261; vegetative, 261-263; 

 influence of environment, 263- 

 276 ; stimuli determining mode in 

 Vaucheria, 26^266, 275; in Hy- 

 drodietyon, 366-268; in Stigeoclo- 

 nium, 268, 269; influence of os- 

 motic pressure, 268, 369; stimuli 

 affecting reproduction in flower- 

 ing plants, 269-275; in Mimulus 

 Tilingi, 270-373; in Viola odo- 

 rata, 274, 275; m Equisetum, 276; 

 in Sequoia, 277 



Resin, 126 



Respiration, Chapter II., pp. 13-39; 

 definition, 13; rates at diflierent 

 times, 15; regulated by proto- 

 plasm, 16; reduction of, 16; sus- 

 pension, 16; object, 16; yield in 

 energy, 17, 23; substances con- 

 cerned, 17, 18; products, 18; 

 characteristic product, 31 ; heat 

 of combustion of sugar, 33, 33; 

 heat of alcoholic fermentation, 

 28, 24; of butyric, 24; of acetic, 

 24 ; of combustion of alcohol, 34; 

 relation of enzymes to respiration, 

 19, 39, 30, 33; optimum temper- 

 ature, etc., 37; effect of injuries, 

 37, 38 ; rate in relation to growth, 

 etc., 38; ratio of O2 to COj, 38; 

 variation in latio, 38, 39 ; amounts 

 of CO2 given off, 39; effective- 

 ness of bacteria, 39; summary, 

 39. See Fermentation, Intramo- 

 lecular respiration 



Response to stimuli, see Geotropism, 

 Irritability, etc. 



Rheotaxis, 190 



Rheotropism, 189 



Roots, 113; corrosive action, 135; 

 early growth in spring, 194; geo- 

 tropism of, 198-206 ; heliotropism, 



314; thermotropism, 221; hydro- 

 tropism, 224 ; chemotropism, 331 ; 

 galvanotropism, 339; thigmotrop- 

 ism, 347 

 Root-hairs, 114, 115 

 Root-pressure, see Sap-pressure 

 Root-tubercles, occurrence, 72; struc- 

 ture, 74; contents, 74; mode of 

 infection, 75; bacteria parasitic 

 in, 76; fix free N, 75 



Salt, 93, 237, 338 



Salt plants, see Halophytes, 94, 95 



Sap, composition of maple, 132 



Sap-flow, 132, 133, 136 



Sap-pressure, distinction from turgor 

 pressure, 181; figures, 135, 136; 

 relation to ascent of water, 120, 

 137, 131, 133; "root-pressure," 

 185 



Sarracenia, 84 



Sea-water, 94, 95, 197 



Secretion, 125-130 



Seeds, respiration in air-dry, 9 ; dur- 

 ation of vitality, 10 



Selective power of roots, etc., 113, 

 113 



"Sensitive plant," see Mimosa 



Sbquoia, reproduction, 377 



Sexual reproduction, see Reproduc- 

 tion; necessary?, 276-379; in in- 

 fusoria, 279; in diatoms, 279 



Sieve-tubes, 157-159 



Silica, 93 



Soil, comparison of, in Eastern and 

 Western States, 11 



Soil water, 104, 105 



Span of life, how limited, 254-256 



"Spring wood," 123, 191-194 



Staining living protoplasm, 107 



Stamens, sensitive to contact, 251 



Starch, proportional and structural 

 formula;, 59; possible mode of 

 formation, 61, 62; translocation, 

 63, 64, 99; in sieve-tubes, 158; 

 storage, 160 



