Index 



Aaron Hill, 333 



Abele, 50 



Absciss layer, 365, 366 



Abundant' pollen of coniferae, 



286 



Accessory buds, 60 

 Acorn, 71, 83, 84, 119, 120 

 Acorn-cup, 71 

 Acorns, 119 

 " Adam's Needle and Thread," 



207 

 Adders' tongues, 251, 266 



prothalli of, 252 

 Adventitious buds, 61 

 Aerial roots, 234 

 Age of Reptiles, 285 

 Albuminous seeds, 118 

 Alcohol, 94 

 Aleurone, 119 

 Algae, fresh water, 94, 95 

 Algae, land, 383 

 Alkali-grass, 153 

 Allen (Grant), quoted, 86, 319, 



320 

 "Alternate ' leaf arrangement, 



122 

 Alternation of generations in 



ferns, 258 



Amaranth, 353, 354, 355 

 American Beauties, 136 

 " American flannel-plant," 347 

 Andersen (Hans Christian), 



quoted, 378 

 Annuals, 368 

 Ants, 27, 79, 340, 341 

 Anthers, 40 

 Anther-ring, 42 

 Apex of growth, 59 

 Apple blossom, 136 

 Apple-seeds, 136 



Apocynum androscemifolium, 



303 



Apocynum cannabinum, 309 

 Aquatic flowers, 30, 31 

 Arbor vitae, 270, 272 

 Archegonia, formation of, 255 

 Archegonia of the pine, 292, 



294 



Archegonia of selaginella, 291 

 Arrow-head, 112 

 Arrow-root, 295 

 Asclepias cornuti, 309 

 Ash, 62 

 Ash buds, 76 

 Ash, European, 77 

 Ash, prickly, 74 

 Ash, white, 75, 76 

 Ash analyses of leaves, 367 

 Asparagus, 94 

 Asphodels, 355 

 Asters, 352 

 Atrophy, 84 

 Awn, 169 



Bacteria, 97 



Bald cypress, 270, 274, 298 



Balsam, 282 



Balsam fir, 276 



Bamboos, 173 



Barbed fruits, 350 



Barberry, 114 



Bark, green, 132 



Bark, nature of, 384 



Bark, outer, 386 



Barley, 62, 103, 118, 151 



Basis of life (physical), 90, 91 



Bast, 128, 129, 130, 394 



Bast-tubes, 133 



Bay, 273 



Beach-grass, 155 



401 



