Plate IV 



Fig. 1. Colony of mountain mint {Pycnanthemum flexuosum) at Station I, g. The large 

 upturned leaves are those of Asclepias sullivantii. (Photograph by T. L. Hatikinson.) 



General view of Station l,g, April 23, 1911, showing- the submerged condition. (Photograph 

 by T. L,. Hankinson.) 



