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'96. 20. Nott, C. P. The Antheridia of Champia parvula. Erythea, IV, 1896. 

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'00. 22. Nitophylla of California. Proc. Cal. Acad. of Sciences. 1900. 



'88. 23. Overton, C. E. Ueber den Conjugationsvorgang bei Spirogyra. Ber. 



d. Deutsch. Bot. Gesellschaft, VI, 1888. 

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 '98. 25. Die Entwickelung der Sexualorgane bei Coleochaete pulvinata. 



Flora, LXXXV, 1898. 



'98. 26. - Zur Entwickelungsgeschichte der Florideen. Bot. Zeit., 1898. 

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of Bot., X, 1896. 

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the Rhodophycese. Annals of Botany, 1895-1898. 

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Botany. I, No. 4, 1898. 

 '93. 30. Setchell, W. A. Distribution of Laminariacese. Trans. Connecticut 



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'98. 31. Seward, A. C. Fossil Plants. Cambridge, University Press, 1898. 

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XIX, 1894. 

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netiana. Bot. Gaz., XXII, 1896. 



'91. 34. Solms-Laubach, H. Count. Fossil Botany. Oxford, 1891. 

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'92. 36. Histologische Beitrage. Heft IV, Jena, 1892. 



37. Van Tieghem, Ph. Traite de Botanique. 

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