USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Wetland Plants and Plant Communities of Minnesota and Wisconsin


(Fraxinus pennsylvanica Marsh.)

Green ash



FIELD CHARACTERISTICS: A deciduous tree growing to a height of 25 m. Leaves are opposite and compound. The leaflets number 5-9 (usually 7) and are toothed, slightly petioled and 4-5 cm. long. The leaf scars are in a half circle. Branches are smooth and round, or nearly so. The bark is furrowed in a very tight, regular diamond pattern of crisscrossing ridges. Fruit is a wedgeshaped samara with a round or somewhat round body and a flat wing. In flower during April and May.

ECOLOGICAL NOTES: Green ash is commonly associated with floodplain forests and, to a much lesser extent, hardwood swamps. However, it is also found in rich upland habitats. Green ash is frequently used for landscaping purposes.

SOURCE: Gleason and Cronquist (1991); Petrides (1972); and Swink and Wilhelm (1994).

Previous Section -- Silver Maple (Acer saccharinum L.)
Return to Contents
Next Section -- American Elm (Ulmus americana L.)

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:31:39 EST
Sioux Falls, SD [sdww54]