The American linden or American basswood (Tilea americana) is a deciduous medium to large upright tree with a neat rounded crown. Leaves are large, heart-shaped with finely serrated edges. When mature, the leaves are matt green on top and paler green beneath. In autumn, the leaves turn a bright yellow. The flowers hang from a leafy bract which becomes a wing for the mature, ball-shaped cluster of brown seeds. The tree is native to eastern North America.