April, 1908.] 
The Vegetation of Cedar Point. 
3 11 
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 they 
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 about the rise of the water table into the bottom of a 
depression which was formerly dry 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. ruhrum) .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- 
