624 



INDEX 



Ants, leaf -cutting, 325 

 Apetalae, 456, 457 

 Apex, 13 

 Apical cell, 195 



Apothecium, 329, 330, 331, 332 

 Araceae, 496 

 Aralia spinosa, 27 

 Archegonia, 169 

 Archegoniates, 222 

 Archegoniophores, 197 

 Archesporial cell, 439 

 Archichlamydeae, 456, 457 

 Arctium minus, 486 

 Arissema triphyllum, 51 

 Arrow-leaf, 449 

 Ascaris, 186 

 Asclepiadaces, 476 

 Asclepias, 476, 477 



syriaca, 475, 478 

 Ascomycetes, 98 

 Ascophyllum, 352, 364 

 Ash, 28 



Aspergillus niger, 72 

 Aspidium Filix-mas, 158 

 Assimilation, 88 

 Aster, 24, 25 

 Austrian pine, 416 

 Avena sativa, 298 

 Axil, 150 

 Azotobacter, 83, 333 



B 



Bacillus radicicola, 82, 318 



typhosus, 310 

 Bacteria, 306 



helpful, 316 



nitrogen-fixing, 318 

 Bacteria and the dairy, 316 

 Banana, 26 

 Barley, 298 



smuts of, 297 

 Barrigona palm, 130 



Base of the blade, 13 

 Bean, 123, 526 

 blight, 309 



Pond, 580 

 Beech, 336 

 Begonia, 179 

 Belladonna, 481 

 Bennettites, 602 

 Betula, 448 



lutea, II 



populifolia, 108 

 Bindweed, 119, 478, 479 

 Biogenesis, 89 

 Biology, 3 

 Biometry, 548 

 Birch, 336, 448 



yellow, II 



white, 108 

 Bittersweet, 481 

 Black-mosses, 193 

 Black mustard, 464 



walnut, 308 

 Bladderwort, 87, 88 

 Blade, 13 

 Blakeslee, 353 

 Blister-blight, 291 

 Blister-rust, pine tree, 301, 302 

 Blodgett, Frederick H., 443 

 Blueberries, 451, 452 

 BoUey, Professor, 92 

 Boneset, 486 

 Boston fern, 163 



ivy, 144 

 Botany, educational value of, s 



fossil, 5 



relation to other sciences, 3 



systematic, 3 



what is, I 

 Botrychium, 175, 178, 214 



virginianum, 176 

 Bowenia, 333, 411 



serrulata, 594 



