386 Reed and Smoot: Polygonum virgin ianum 



LITERATURE 



Beal ('98). Seed dispersal. New York. 1898. 



Hildebrand (*73). Die Verbreitungsmittel der Pflanzen. Leipzig. 



1873- 

 Kerner (*95). The natural history of plants (trans, by Oliver). 



New York. 1895. 

 Newcombe ('95). The regulatory formation of mechanical tissue. 



Bot. Gaz. 20: 441. 1895. 

 Sirrine ('94). Structure of the seed coats of the Polygonaceae. 



Proc. Iowa Acad. Sci. 2: 128. 1894. 

 Small ('95). A Monograph of the North American species of the 



genus Polygonum. Memoirs from the Department of Botany of 



Columbia University, vol. I. 1895. 



