460 BOTANY 



'88. 12. Gray, A. Synoptical Flora of North America, The Gamopetalae. 



Washington, 1888. 



'01. 13. Jepson, W. L. Flora of Middle California. Berkeley, 1901. 

 '92. 14. Lubbock, J. Seedlings. New York, 1892. 

 '00. 15. Merrell, W. D. Contribution to the Life-history of Silphium. Bot. 



Gaz., XXIX. 1900. 

 '91-'98. 16. Sargent, C. S. Silva of North America. Boston and New York. 



1891-1898. 

 '98. 17. Strasburger, E. Text-book of Botany. 1898. 



'97. is. Bot. Practicum. Jena, 1897. 



'91. 19. Van Tieghem, Ph. Traite de Botanique. Paris, 1891. 



'95. 20. Warming, E. W. Handbook of Systematic Botany. London, 



1895. 

 21. Wood, A. Class-book of Botany. 



