2 SANDUSKY FLORA. 



Academy of Science, in addition to Monroe county, 

 which is about three times as large as Erie county, 

 Ohio, includes portions of five other counties and gives 

 twenty species reported by early botanists, but no 

 longer found. All of these districts border on Lake 

 Ontario and one of them on Lake Erie also. 



The whole of England contains but about 1200 

 native phenogams ; surpassing the little district about 

 Sandusky by less than a hundred species. 



Although several hundred native plants not 

 found in Erie county grow in one place or 

 another in Ohio, yet so well is the flora of the state 

 represented here, that it is probably not too much to 

 say that excepting the counties bordering on the Ohio 

 river and those that contain sphagnous swamps or 

 bogs, there are few counties in the state where a 

 botanist, unfamiliar with the territory would be likely 

 to find in a single day's search more than half a dozen 

 native species that do not grow somewhere in Erie 

 county. The surpassing richness of the Sandusky flora 

 is not due to the fact that it includes islands within its 

 territory, for scarcely any of its species are confined to 

 the islands, nor is it in very large measure due to the 

 fact that it includes species that are confined to the lake 

 shore but rather to peculiarities of climate and geolog- 

 ical features, both of which depend to some extent on 

 the proximity of the lake. 



CLIMATIC INFLUENCE OF LAKE ERIE 

 ON VEGETATION. 



The Catalogue of Canadian Plants in six volumes 

 includes the whole territor}' lying north of the Great 

 Lakes and extending from the Atlantic to the Pacific. 

 The Sandusky district contains 165 native species and 

 varieties not given in the Canadian catalogue besides a 



