198 WOODY PLANTS 



Sargent, F. L. Key to Common Deciduous Trees in Winter and 

 Key to Common Woods. Cambridge, Mass. 1903. 



Strausbaugh, P. D. and Earl L. Core, Trees and Shrubs of West 

 Virginia. Mimeographed. Morgantown. 1935. 



Trelease, William. Winter Botany. Published by the author. 

 Urbana, 111. 1918. 



Wiegand, K. M. and F. W. Foxworthy. A key to the genera of 

 woody plants in winter. Ithaca, N.Y. 1904. 2nd ed. , 1906. 

 3rd. ed. 1908. 



