INDEX 



Abiogenesis, 89 

 Abscission layer, loi 

 Absorption, 11 

 Acacia, 327 

 Acer rubrum, 337 



saccharinum, 142 

 "Adder's tongue," 175, 177 

 Adirondack bog, 580 

 Adjustment to environment, : 

 Adiantum, 156, 170 



concinnum, 173 

 Adnation, 464 

 Aerobes, 103 

 Aesculus Hippocastanum, 36, 



121 

 Agapanthus umbellatus, 608 

 Agaricus campestris, 288 

 Agassiz, Louis, 503 

 Agathis australis, 610 

 Albugo Candida, 292 

 Alcoholase, 100 

 Aldehydase, 79 

 Alfalfa leaf-spot, 295 

 Alismaceae, 491 

 Alisma Plantago-aquatica, 



492, 493 

 AUelomorphs, 555 

 Alnus, 83 



Alsatian clover, 469 

 Alsike, 469 



Alternation, antithetic, 575 

 homologous, S7S 



Ambrosiaseae, 488 

 Amorpha, 467 

 Amylase, 80 

 Amyloplast, 78, 81 

 Anaerobes, 102, 103 

 Anatomy, 4 

 Anchorage, 11 

 Andreaeales, 193 

 Androecium, 435 

 Anemone, 462 

 89 Anemonella thalictroides, 463 



Angiopteris evecta, 595 

 Angiosperms, 408, 446 • 



ancestors of, 600 



life-cycle of an, 444 

 120, Annulus, 157, 202 



Ant, fungus-growing, 326 

 Anther, 436 

 Antheridia, 170, 171 

 Antheridiophores, 196 

 An thesis, 472 



Anthoceros, 209, 214, 219, 220, 

 341, 356 



fimbriatus, 210 



fusiformis, 209, 214, 215 



laevis, 213 

 444, Pearsoni, 213 



phymatodes, 217 



punctatus, 209 



tuberosus, 217 

 Anthocerotales, 210 

 Antipodal cells, 440 

 Antiseptic surgery, 315, 316 

 Antitoxin, 314 

 623 



