Blue Ash (Fraxinus quadrangulata)

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The Blue ash is a medium to large-sized tree that is usually 40 to 60 feet tall, but can attain a height of 150 feet with a trunk diameter of 3 feet. It is the only eastern ash with square twigs. The leaves are 8 to 12 inches long with 7 to 11 leaflets, 3 to 5 inches long, oval or lance shaped, and finely toothed margins.

Forestry Extension
Department of Natural Resource Ecology and Management
339 Science II, Iowa State University, Ames, Iowa 50011-3221