The Shagbark Hickory (Carya ovata) is a common hickory in the eastern United States and southeast Canada. It is a large deciduous tree, growing up to 27 m tall, and will live up to 200 years old. Mature Shagbarks are easy to recognize because, as their name implies, they have shaggy bark. This character is however only found on mature trees; young specimens have smooth bark.
The shagbark hickory's nut is edible and has a very sweet taste.
The leaves are 30-60 cm long, pinnate, with five (rarely three or seven) leaflets, the terminal three leaflets much larger than the basal pair. The flowers are small wind-pollinated catkins, produced in spring. The fruit is a drupe, an edible nut, 2.5-4 cm long contained in a thick green four-sectioned husk which turns dark and splits off at maturity in the fall and a hard, bony shell. 
There are two varieties:
Some sources consider Southern Shagbark Hickory as the separate species Carya carolinae-septentrionalis
"Hickory" is derived from pawcohiccora, an Algonquin Indian word for the tree's oily nutmeat.
The nuts were a food source for Native Americans.