3 leaflets, a type of maple.........................................................Boxelder (Acer negundo)



5 to 9 leaflets with stalks at their bases.............................White Ash (Fraxinus americana)



  7 to 9 leaflets, no stalks at bases.........................................Black Ash (Fraxinus nigra)



 7 to 11 leaflets with stalks,  hairy below.......................Green Ash (Fraxinus pennsylvanica)