Liriodendron tulipifera — known as the tulip tree, American tulip tree, tuliptree, tulip poplar and yellow poplar — is the Western Hemisphere representative of the two-species genus Liriodendron, and the tallest eastern hardwood. It is native to eastern North America from Southern Ontario and Illinois eastward across southern New England and south to central Florida and Louisiana. Six known aporphine alkaloids, asimilobine, norushinsunine,  norglaucine, liriodenine, anonaine and oxoglaucine were found to be responsible for the antiplasmodial activity of the bark. Leaves yielded two known sesquiterpene lactones, peroxyferolide and lipiferolide with antiplasmodial activity. The Liriodendron tulipifera tree grows readily from seeds, which should be sown in a fine soft mould, and in a cool and shady situation. If sown in autumn they come up the succeeding spring, but if sown in spring they often remain a year in the ground.