MOSELEY. 27 



well believe the picture to represent what was once a 

 reality. How long ago this was we cannot tell. Some 

 observations make it seem probable that it was not a 

 great many centuries ago, perhaps less than twenty. 

 Sometime we may find better means of judging. 



SOUTHERN AND WESTERN PLANTS WHICH 

 GROW NEAR LAKE ERIE. 



Owing to the long summer enjoyed by places situ- 

 ated on the south shore of Lake Erie, many plants 

 grow here which are not found farther north. As the 

 country farther east lacks prairies such as occupy a 

 considerable part of Erie county, quite a number of 

 species appear to reach their eastern limit here. Since 

 a number of the species are both southern and 

 western, no separation of southern and western species 

 is .attempted in the following list. Many of the south- 

 ern species grow east of the southern part of Lake 

 Michigan, and some of them in southern Minnesota, 

 where the summer isotherms reach a higher latitude 

 than in the eastern part of the country. The species in 

 the list are believed to be wholly wanting or of rare 

 or local occurrence in that part of North America, 

 which lies east and north of the meridian and parallel 

 of Cleveland, Few of them are found in northern Ohio 

 anywhere east of Erie county. The plants whose 

 names are followed by an asterisk I have not found, 

 but Mr. David F. Day, of Buffalo, who collected at 

 Toledo in 1865, tells me that he found them there. 



Echinacea purpurea is inserted in the list because 

 of a Toledo specimen in the herbarium of the Ohio 

 State University. 



Viola pedatifida. Polygala verticillata ambigua. 



Hypericum gymnanthum. Desmodium lineatum. 



Hibiscus tnilitaris.* Desmodium illinoense. 



Aesculus glabra. Petalostemon candidus.* 



