28 DEVELOPMENT OF SIUM CICUTAEFOLIUM. 



LITERATURE CITED. 



AGASSIZ, Louis. 



1848-1849. Twelve lectures on comparative embryology. Boston: Lowell 



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BRAUN, ALEXANDER. 



1851. Reflections on the phenomenon of rejuvenescence in nature, especially 

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BURNS, GEORGE P. 



1904. Heterophylly in Proserpinaca palustris L. Annals of Botany, 18: 579- 



587. 

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1902. Studies of localized stages of growth in .some common New England 

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GLASER, OTTO C. 



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GOEBEL, KARL. 



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HAECKEL, ERNST. 



1866. Generelle Morphologic der Organismen, 2 Bde. Berlin : G. Reimer. 



HYATT, ALPHEUS. 



1890. Genesis of the Arietidae. Smithsonian Contribution 673, and Mem. 



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JACKSON, R. T. 



1899. Localized stages in development in plants and animals. Proc. Boston 

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KLEBS, G. 



1903. Willkurliche EntwicMungsanderungeti bei Pflanzen. pp. iv, 166. Figs. 

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McCALLUM, W. B. 



1902. On the nature of the stimulus causing the .change of form and structure 

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TAMMES, Fraulein TINE. 



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VON BAER, K. E. 



1828. Ueber Entwicklungsgesdhiohte der Thiere. Beobaditungen und Re- 

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