INDEX 



Figures in t)()ldf:ice type indicate page8 on which ilhistrations occur. 



Abies, 15 



Absorption, of water and salts, 53, 54 



bands, in spectrum, 72 

 Accommodation, to unusual tem- 

 peratures, 157 

 Acer, 6 species of, 258 

 Achene, 200 

 Acquired characters, inheritance of, 



210, 235 

 Actnea, fruit of, 201 

 Adaptation, 155 

 Adder's tongues, 333 

 Adiantum, stem of, 329 

 Aecidiospore, 298 

 Aecidium, 298 

 Agaricaceae, 300 

 Agaricus, 299 

 Agriculture, 3 

 Air, in soil, 29 

 Albugo, 292 

 Alcohol, produced by fermentation, 



131 

 Aleurone-grains, 122 

 Aleurone layer, 122 

 Alga-like fungi, 289 

 Algae, 11, 12, 264-284 



blue-green, 265, 266 



brown, 278 



green, 266 



in lichens, 303, 304 



red, 282 

 Allelomorph, 213 

 Alternate leaf arrangement, 90 

 Alternation of generations, 248 



advantages of, 249 



in bryopliytes, 250, 311 



in pteridophytes, 250 



Alternation of generations, in red 

 algae, 284 



in spermatophytes, 251 



in thallophytes, 249 



origin of, 249 

 Anient, 362 

 Amentiferae, 362 

 Amino-acids, 122 

 "Amphibious" plant, 164 

 Anaphase, of mitosis, 140 

 Anatomy, 3 



Anemophilous flowers, 194 

 Angiosperms, 15, 16, 355-360 



female gametophyte of, 358, 359 

 Animals, compared with plants, 244 

 Annual ring, 101, 148 

 Annulus, 329, 331 

 Anthemis, 366 

 Anther, 185 



Antheridial filament, 291 

 Antheridium, 271, 312, 321 

 Anthoceros, 317, 318 

 Anthocerotales, 317 

 Antipodal cells, 358, 359 

 Antitoxin, 288 

 Apophysis, 322 

 Apple, leaf of, 64 

 Arales, 365 



Archegonium, 312, 321 

 Archichlamydeae, 361 

 Arctium, fruit of, 201 

 Aristotle, 4 

 Ascent of sap, 111 

 Asclepias, fruit of, 200 

 Ascocarp, 293 

 Ascogonium, 295 

 Ascomycetos, 292 

 Ascosporo, 293 

 Ascus, 293 



Asexual reproduction, 182 

 Ash, of plants, 31 



371 



