American basswood - Tilia americana

"Tilia americana" is a species of tree in the family Malvaceae, native to eastern North America, from southeast Manitoba east to New Brunswick, southwest to northeast Oklahoma, southeast to South Carolina, and west along the Niobrara River to Cherry County, Nebraska. It is the sole representative of its genus in the Western Hemisphere, assuming "T. caroliniana" is treated as a subspecies or local ecotype of "T. americana".