Jennings : Occurrence of Wynnea Americana in Penna. 227 



growth, many parts of the tuber showing old shells or husks, which 

 were evidently the remains of former protuberances. 



The accompanying photograph, taken by the writer at Ohio Pyle, 

 Pa., Sept. i, 1907, shows the appearance of the species when just dug 

 out of the earth. The photograph shows the specimens one-half 

 natural size. 



Carnegie Museum, 



November 20, 1907. 



