April, 1908.] 
The Vegetation of Cedar Point. 
3 2 7 
In the immediate vicinity of the Laboratory there has been 
initiated a secondary Catalpa Blowout Formation by the planting 
of a considerable grove of Catalpa seedlings for commercial pur¬ 
poses, but, nevertheless, constituting an ecological experiment 
of more than passing interest. It is too early to yet predict as to 
the outcome but it appears probable that the trees will succeed 
if their roots can once become established in lower layers of 
sand with abundant and never failing ground-water near at 
hand. If successful and permitted to reach considerable size, 
dune formation will likely take place on a rather extensive scale 
and eventually, if allowed to run its course, the place would 
become an elevated more or less level area with a Quercus velu- 
tina imbricaria Forest Formation such as in the area now occu¬ 
pied by the buildings of the pleasure resort. 
Fig. 15. Secondary Catalpa Blowout Formation showing dead plants 
where the sweep of the wind has induced excessive transpiration. 
THE BAY-MARSH-WET MEADOW-THICKET-FOREST SUCCESSION. 
Along the western side of the peninsula the vegetational 
structures represent a variety of conditions of environment which 
may be classed in a general way under three heads: 
1. The Beach Habitat. This habitat includes those portions 
of the shore which are exposed fully to the action of the surf and 
from which the water deepens outwards with comparative 
rapidity. 
2. The Marsh Habitat. This habitat comprises those por¬ 
tions of the shore which are comparatively free from the action 
of violent surf and from which the water deepens outwards from 
the land very slowly. 
