Harshberger: Plant formations of Nockamixon Rocks G73 



days being spent during June and early July In the collection of 

 plants and in a study of the flora. Collections of Nockamixon 

 plants repose in the herbaria of Lafayette College, Easton, Penn- 

 sylvania, of the Academy of Natural Sciences of Philadelphia, of 

 the New York Botanical Garden, and of the University of Penn- 

 sylvania. 



University of Pennsylvania, 

 Philadelphia, Pa. 



