INDEX 



Abiogenesis, 89 

 Abscission layer, 101 

 Absorption, n 

 Acacia, 327 

 Acer rubrum, 337 

 "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, 505 

 Agathis australis, 610 

 Albugo Candida, 292 

 Alcoholase, 100 

 Aldehydase, 79 

 Alfalfa leaf-spot, 295 

 Alismaceae, 491 

 Alisma . Plantago-aquatica, 



492, 493 



Allelomorphs, 555 

 Alnus, 83 



Alsatian clover, 469 

 Alsike, 469 

 Alternation, antithetic, 575 



homologous, 575 

 Ambrosiaseae, 488 



Amorpha, 467 

 Amylase, 80 

 Amyloplast, 78, 81 

 Anaerobes, 102, 103 

 Anatomy, 4 

 Anchorage, n 

 Andreaeales, 193 

 Andrcecium, 435 

 Anemone, 462 



189 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 

 Anthesis, 472 



Anthoceros, 209, 214, 219, 220, 

 34i, 356 



fimbriatus, 210 



fusiformis, 209, 214, 215 



laevis, 213 

 444, Pearsoni, 213 



phymatodes, 217 



punctatus, 209 



tuberosus, 217 

 Anthocero tales, 210 

 Antipodal cells, 440 

 Antiseptic surgery, 315, 316 

 Antitoxin, 314 

 Ants, leaf -cutting, 325 

 623 



