A box elder growing in a canyon.
box elder definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a medium-sized, fast-growing North American maple (Acer negundo), with compound leaves
box elder definition by American Heritage Dictionary
A North American maple tree (Acer negundo) having pinnately compound leaves with coarsely toothed to lobed leaflets. Also called ash-leaved maple.