April, 1908.] 



The Vegetation of Cedar Point, 



311 



resort there were other lagoons between the ridges in advanced 

 stages of the lagoon succession, mostly in the thicket and forest 

 stages although the rise of the water seems to have brought about 

 marsh conditions in places. These older lagoons were not much 

 studied as to the structure of their vegetation before thev 

 were destroyed by the dredging out of the artificial canals. 



To the left of the path leading to the Eastland Dock and not 

 far from the outlet of the artificial "Lagoons" is a small depres- 

 sion which is interesting in that it represents a secondary pond 

 or lagoon succession. The rise of water in the Lake has finally 

 brought abouc the rise of the water table into the bottom of a 

 depression which was formerly dr-y land and there will accordingly 

 follow in due time, the displacement of the present Ulmus-Acer 

 forest by a secondary hydrophytic succession. 



Fig. 6. Depression between outlet of "Lagoons" and the path 

 to the Eastland Dock. 



The present vegetation in and immediately around the water 

 is as follows: 



Primary Layer: 



Acer saccharinum, {perhaps some A. rubrum) 60%, 



Ulmus americana 15% , 



Platanus occidentalis 15%. 



Fraxinus americana 10% , 



Fraxinus nigra, one small tree. 



Subordinate Layers: Below the primary layer there appear 

 to be'only species from the lower layers of the surrounding forest 

 formation, with the one exception that in the pond is con- 



