Fraxinus pennsylvanica
Green Ash
Oleaceae

Located by metered lot near Whetten Graduate Center.

  • leaves opposite, pinnate compound, with 5 to 9 leaflets
  • leaflets ovate-lanceolate, acuminate, with serrate or smooth margins
  • leaf undersides often somewhat pubescent, unlike white ash
  • leaves dark green; turning clear yellow in fall (F. americana is often purplish)
  • terminal bud round, scaled, often pubescent, rusty brown
  • buds smaller and narrower than F. americana
  • lateral buds smaller, set in the leaf scar
  • leaf scars not notched like white ash
  • stems thick, coarse, with raised leaf scars that are rounded and brown
  • stems appear with characteristic swellings ("pretzel with salt") when viewed from afar
  • stems often fuzzy, unlike F. americana
  • flowers inconspicuous in early spring
  • fruit is an elongated samara, in clusters, like a boat paddle, falling early
  • bark dark gray, with characteristic deep furrows and narrow ridges
  • habit is a medium to large single-stem shade tree; pyramidal when young
  • plant develops an open, irregular crown with age


View Fraxinus pennsylvanica page in the UConn Plant Database


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