from the Herbarium of Michaux, from which we have ascer- 

 tained that this is his A. cordifolius. We have received it 

 under the same name from Dr. Torrey ; and it is probably 

 that of other American Botanists: not, however, ofNuttall, 

 who evidently, by combining it with A. heterophyllus, was 

 aware of the true A. cordifolius. 



J. L. 



