Subject Index 



Abies, 189 



Abnormal growth, 275-299 



amorphous structures in, 287 



distinguished from pathological, 277 



morphogenetic significance, 299 



new structures produced by, 283 



of organs, 277 



produced by growth substances, 290 



two concepts, 276 

 Abscission, stimulation and inhibition, 



405 

 Absolute size, morphogenetic effects, 359 

 Acacia, 206, 209 

 Acalypha, 128 

 Acer, 84, 109, 129 

 Acetabularia, 136, 233, 427 



nuclear control in, 427 



polarity in, 137 



regeneration in, 233 

 Achimenes, 124, 249, 253 

 Achlya, 400 

 Acrasiaceae, morphogenetic significance, 



223 

 Acrasin, 223 



effect on aggregation, 406 

 Actinomorphic flowers, 175 

 Adaptation not inherent in organization, 



452 

 Adenine, and bud formation, 247 



and leaf formation, 396 

 Adventitious buds, on leaves, 245 



on roots, 245 



on shoots, 251 



and vascular development, 72 

 Agaricus, growth of sporophore in, 228, 



229 

 Aggregation in Acrasiaceae, 223 

 Aging, significance in morphogenesis, 



210 

 Agrobacterium, 291 

 Alkaloids, passage across graft, 261 

 Allium, 78, 107 

 Allometric constants, segregation, 113, 



423 

 Allometry, 105 

 Allomyces, 400 



Allopolyploidy and evolution, 441 

 Ambrosia, 317 



Amino acids, in meristematic region, 72 



in prothallial development, 372 

 Ampelopsis, 125 

 Amphibious plants, 216 

 Amphigastria, 171 

 Amphitropy, 171 

 Anacharis, 68 

 Anadendrum, 209 



Anatomical coefficients and drought re- 

 sistance, 326 

 Angiosperms, shoot meristem in, 68 

 Angle meristem in Selaginella, 248 

 Animal hormones, effect on sex in plants, 



400 

 Anisophylly, 171, 354 



factors in, 171 



habitual, 172 



role of gravity in, 354 

 Annual rings, factors determining, 85 



use in studying past, 86 

 Anomalous secondary growth, 87 

 Antheridium-forming substance in ferns. 



400 

 Antiauxins, 408 

 Antirrhinum, 264, 282 

 Apical cell, 56 



angiosperm root, 76 



angiosperm shoot, 60, 65 



fern leaves, 89, 187, 238 



lower plants, 56, 75 

 Apical dome in shoot meristem, 60 



cell relations in, 68 



shape, 67 

 Apical meristem, determination of stelar 

 structure by, 72 



development in embryo, 78 



organization, 59 



root, 75-79 



self-determining region, 238 



shoot, 59-68 

 Apogamy, 256 

 Apospory, 256 

 Aquilegia, 41, 426 

 Araucaria, 189, 214, 404 

 Aristolochia, 247 

 Aster, 358, 387, 388 

 Asymmetry, 173 

 Atropa, 261 



538 



