2 94 The Ohio Naturalist. [Vol. VIII, No. 6, 



Point, the vegetation is almost entirely in its natural state, free 

 from human interference, and some of the successions present a 

 remarkably complete series of stages, whereas Cedar Point pre- 

 sents, in many cases, a fragmentary series considerably disturbed 

 by man's activities. 



AVith this explanation the writer in this contribution may, 

 perhaps, be pardoned for frequent comparative references to the 

 vegetation of Presque Isle. Although often differing consider- 

 ably as to particulars, Presque Isle and Cedar Point have much 

 in common, both with reference to the general physiographic 

 development of the peninsulas and to the ecological classification 

 of their vegetation. 



The best method of treatment of the structure of the vegeta- 

 tion of any particular locality is, to be sure, more or less dependent 

 upon the completeness of the successions. If the various stages 

 of the successions are present it is most logical to use the develop- 

 mental method, taking up the various stages in the order of their 

 development and considering the vegetation as a gradual growth 

 or evolution from the simple initial stages to the more complex 

 stages tending towards stabilization. 



The vegetation of Cedar Point will be discussed in this paper 

 according to the developmental method, as many of the succes- 

 sional stages are exemplified, or at least indicated, in the present 

 vegetation, while correlations with certain similar structures on 

 Presque Isle will indicate the probable composition of certain 

 missing stages. 



The following classification is here presented as a provisional 

 outline of the vegetational structures on Cedar Point. Wherever 

 the same structure has been recognized both here and on Pres- 

 que Isle the same nomenclature has been adopted as was used 

 in the author's forthcoming work on the ecology of Presque Isle. 



A — The Cottonwood Bar-Ridge-Thicket-Forest Succession, 

 a — The Populns-Salix Dune Formation, 

 b — The Andropogon Dune Formation, 

 c — The Toxicodendron Thicket Formation, 

 d — The Pinus-J uniperus Forest Formation, 

 e — The Quercus velntina-imbricaria Forest Formation, 

 f — The Ulmus-Acer Forest Formation. 



B — The Lagoon-Marsh-Wet Meadow-Thicket-Forest Succession, 

 a — The Potamogeton Formation, and 



The Popuhis-Salix Formation, 

 b — The Potamogeton Formation, and 



The J uncus-Eleocharis Formation, and 



The Populus-Salix Formation. 

 c — The Potamogeton Formation, and 



The Typha-Scirpus Formation, and 



The Salix spp. Formation, and 



The Populus-Salix Formation. 



