GROWTH AND DEVELOPMENT OF THE INFLORESCENCE AND FLOWER 521 



simplification and unification of outlook on this great and varied group 

 may in time become possible. Theoretical aspects of the inception and 

 development of the inflorescence and flower, largely based on recent 

 investigations of the shoot apex, have been considered. Examples were 

 given of some of the specific problems in floral morphogenesis that 

 await fuller investigation, and the value and general interest of the in- 

 formation that may be obtained from new observations and experi- 

 mental investigations of diflFerent kinds were discussed. 



As work progresses, it seems likely that certain major morpho- 

 genetic factors may prove to be of general occurrence. If so, new light 

 may be shed on hitherto obscure phylogenetic relationships, and we 

 may perhaps begin to understand why the same kind of evolutionary 

 change has occurred independently in seemingly unrelated groups. 



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