40 v BOTANY OF LA SALLE COUNTY. 



gentleman had the pleasure of sending- him specimens 

 of the plant in flower. He now admitted that the 

 determination was correct, but that he could not have 

 believed it was a native of this region without this 

 evidence. He however thought that the presence of 

 salt spring's explained the matter. But plants of this 

 character are not all found near salt springs. In fact 

 there seems to be many remnants of a former seashore 

 flora yet lingering here, not merely along the borders 

 of the salt marsh so called, but in other places as well. 

 They are too numerous to have been accidently intro- 

 duced, have no properties that make them valuable to 

 man and would thus lead him to introduce them and 

 are not well calculated to migrate unaided. Besides 

 the conditions under which they are found render it 

 certain that this is their native land and that they are 

 but a fragment of a flora that has nearly vanished, a 

 change of conditions having made it impossible for it 

 to sustain itself longer in this region and its former 

 presence being indicated by these hardiest members of 

 its tribes. We shall not attempt to reproduce to the 

 reader's imagination the conditions under which this 

 flora was in the ascendent; we state the fact and leave 

 our audience to draw their own inferences. 



Flora LaSallensis. Catalogue of the Plants of 

 La Salle County, 111., and the adjacent counties of 

 Kendall, Grundy, Livingston, Marshall, Putnam, 

 Bureau and DeKalb, and in general for that part of 

 the state north of the latitude of Bloomington. A few 

 plants confined to the shores of Lake Michigan are 

 not found in La Salle County. 



The authorities used have been Prof. Rinaldo Wil- 

 liams of Streator. A name preceded by a W. is from his 

 catalogue, published in Baldwin's History of La Salle 



