A 



DISSERTATION 



OV THE 



EUPATORIUM PERFOLIATUM 



LINN^US. 



The genus Eupatorium, according to the 

 artificial system of Linn^us, is arranged under 

 the class syngenesia, order polygamia sequa- 

 lis, and is described in the following manner : 



Cal. Communis oblongus, subcylindricus : 

 imbricatus : squamis lineari-lanceolatis, 

 erectis, inaequalibus. 



Cor. Composiia umfoimist tubulosa: Corol- 

 lula. hermaphroditae, aequales. 

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