INDUCTION, DEVELOPMENT, AND HERITABILITY OF FASCIATIONS. 17 



(7) The morphology of the fasciated stem is the enlargement of a single 

 growing point. There is no evidence of fusion in the growing region. 



(8) When tested in pure cultures, the progeny of fasciated individuals 

 show no greater tendency to fasciation than the progeny of normal plants. 

 The effects of the stimuli causing these malformations in the evening-prim- 

 rose are therefore to be taken as in no wise heritable. 



In conclusion, the writer wishes to express her appreciation of the assis- 

 tance and of the many courtesies extended to her by Dr. D. T. MacDougal, 

 Dr. H. M. Richards, and by the director and the members of the staff of 

 the New York Botanical Garden. The work was begun under the auspices 

 of the garden and continued under those of the Carnegie Institution of 

 Washington. 



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