Northern Hawkberry - Celtis occidentalis
Up to 80 or more feet in height, although typically much smaller, with a straight trunk and a rounded or columnar crown, Northern Hackberry is widespread in range, growing in a variety of habitats from eastern Colorado to the Atlantic, north to Canada, and south to Mississippi. The bark is corklike with protuberances. The leaves are glossy, ovate, with a long tip, and coarse teeth; autumn color is yellow. The small flowers are borne in clusters, and the dark purple fruit, which persists into winter, is high in fat and carbohydrates.