Northern Prairie Wildlife Research Center
Green Ash (Fraxinus pennsylvanica)
- Family: Ash (Oleaceae)
- Flowering: April-May.
- Field Marks: The green ash has leaflets not decidedly paler on the lower surface and usually at least partially toothed. The young, expanding leaves are purplish.
- Habitat: Swamps, floodplain woods, along streams, around ponds.
- Habit: Tree up to 60 feet tall with a pyramidal to broadly rounded crown.
- Bark: Light or dark gray, with diamond-shaped furrows between flat-topped, sometimes scaly ridges.
- Leaves: Opposite, pinnately compound, with 7-9 leaflets; each leaflet lanceolate to elliptic to elliptic-ovate, pointed at the tip, tapering to the base, toothed along the edges, green and either smooth or hairy on both surfaces, up to 6 inches long, up to 2 inches broad.
- Flowers: Male and female flowers borne on separate trees, in branched clusters, green or purplish.
- Sepals: Minute.
- Petals: 0.
- Stamens: 2.
- Pistils: Ovary superior.
- Fruits: Samaras lance-shaped, up to 2 1/2 inches long, up to 1/2 inch broad, with the wing not extending to the base of the seed.
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