Fraxinus pennsylvanica (green ash). Credit: Keith Kanoti. “Fraxinus pennsylvanica leaf” by Keith Kanoti, Maine Forest Service, USA – This image is Image Number 5349055 at Forestry Images, a source for forest health, natural resources and silviculture images operated by The Bugwood Network at the University of Georgia and the USDA Forest Service.. Licensed under CC BY 3.0 us via Wikimedia Commons – http://commons.wikimedia.org/wiki/File:Fraxinus_pennsylvanica_leaf.jpg#/media/File:Fraxinus_pennsylvanica_leaf.jpg