Thank you for contacting eXtension. I'm sorry, but it is almost impossible to identify a plant from a single leaf photograph. Is it a tree, shrub, or something else? Its size, its habit, where it was growing (geography and environment)--these can help pin down an identification. The arrangement of leaves on a branch is often key: you may be able to use the What Tree Is It website from the Ohio Public Library System (http://www.oplin.org/tree/index.html) to find your answer (if it's a tree), or send further details and we can forward your question to an expert.