|ash (Fraxinus spp.)||
ash (Fraxinus spp.; OLIVE FAMILY [Oleaceae]) Medium to tall trees with opposite compound leaves of typically 7 to 13 leaflets. Long and narrow fruits with a single terminal wing are released late in the growing season, and are often blown long distances over the ice of rivers and lakes during the winter. Most species have large, half-round, notched leaf scars, showing an elliptical line of tiny, vascular bundle scars. Wisconsin species include white ash, which grows tall in fertile, well drained woods; green ash, most common on the shores of rivers and lakes; and black ash, which is typical of hardwood swamps. 
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