Pictured here is a shadblow, Amelanchier arborea, also a member of the Rosaceae. This species is native to sandy areas of eastern North America. A species more closely related to the domestic apple is the black chokeberry, Pyrus melanocarpa, which grows in boggy woodland areas of northeastern North America. An extensive list of photographs of other North American native species is on-line at Texas A&M University.
The domestic pear, Pyrus Commùnis, is even more closely related to the apple, a fact that is obvious in older varieties such as the White Winter Pearmain.