The common North American trees with pinnate leaves. Identity hickory, ash, walnut, black locust or pecan using this tree leaf key and attached tips.
How to Identify the Shellbark Hickory, Washington University Arboretum
Carya laciniosa (Big Shellbark Hickory, Broom Hickory, King Nut, Shagbark Hickory, Shellbark Hickory)
Trees with Pinnate Leaves: Hickory, Ash, Walnuts
Arkansas Tree Database - Image Gallery
Maryland Trees Collection
Bitternut Hickory Missouri Department of Conservation
Tree Leaf-Shape pinnate
Hickory Hot Sex Picture
Minnesota Seasons - northern shagbark hickory
The Mockernut Hickory Tree - Footsteps in the Forest
Identification of Common Trees of North Carolina