INDEX 



Figures in heavy-faced type indicate illustrations 



Abnormal growths, 357 



Absorption, water, 165; system, 168, 268; 



machinery, 169; by roots, 172; cortex 



to ducts, 174; of minerals, 189; of 



gases, 190; of organic substances, 193; 



of salt water, 268 

 Acacias, 70 

 Acanthus, 385 

 Accident in growth, 369 

 Acclimatization, 254 

 Accumulation of characters, 409 

 Acids, 117; chemistry, 118 

 Adaptation, nature, vi, vii, 11, 12, 47, 60, 



424 



Adjustive vs. adaptive structures, 254 

 Adjustment of plants to light, 224; to 



moisture, 239; to chemical substances, 



241; to touch, 242; to gravitation, 245; 



to minor influences, 251; in growth, 



369 

 Aeration; system, 190, 191, 192, 206, 



271; in water-plants, 194; of soils, 85 

 Aerial roots, 68, 382 

 Aerotropism, 241, 242 

 Aging of plants, 163 

 Agriculture, 3 

 Albumins, 127 

 Alcohol, formation, 97, 98 

 Algae, of hot springs, 265; fertilization, 



304; described, 445 

 Algal paper, 377 

 Alkaloids, 103, 106, 125, 274 

 Alpine plants, 321 

 Alterability of individuals, 413 

 Alternation of generations, 455 

 Amides, 106, 120, 125 

 Amoeba, 380 

 Amygdalin, 119, 120 

 Anatomy, defined, 2 



Anchor roots, 196, 358 



Angiosperms, 460, 461 



Animals, protection against, 274; pol- 

 lination by, 309; dissemination by, 

 394, 461 



Annuals, 366 



Annual rings, 365 



Anther, 281 



Anthocyan, 39, 119 



Antibodies, 254 



Ants, and flowers, 325; and dissemina- 

 tion, 398 



Aphorisms, of Bacon, 9 



Applications of science, 4, 5 



Aristolochia, fertilization, 311 



Ascent of sap, 213 



Asparagin, 120 



Association, 465 



Atmospheric pressure, 215 



Autophytes, 464 



Autumn coloration, described and ex- 

 plained, 40, Plates II, III; significance, 

 43; causes influencing, 45, 148 



Autumn, vegetation in ; 368 



Auxograph, 329, 330 



Bacteria, 4, 102, 122, 262, 273, 281, 391, 

 451; chemosynthetic, 448; dissemina- 

 tion, 452 



Bacteriology, 3 



Barometric pressure and growth, 336 



Basal food, 106 



Bayberry wax, 118 



Bezoars, 377 



Biennials, explained, 366 



Biology, defined, 3 



Biotypes, 420, 423 



Birds, in cross pollination, 323; in dis- 

 semination, 395, 397 



467 



