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Arboretum Facts

  • The largest tree in the Oak Grove is a White Oak that is 11 feet 4 inches in diameter, 41 inches wide and approximately 140 feet tall.
  • Based on a study in 1961, there were 149 trees in the Oak Grove. Today there are ninety. There were thirty-two species of trees in the Oak Grove. Today there are sixteen species.
  • There are numerous specimens of Eastern Hemlock (the Pennsylvania state tree) on campus. There are no specimens of Mountain Laurel (the state flower) on campus.
  • The mixed Oak forest is the most common habitat in Pennsylvania. It is also commonly known as the Oak/Hickory forest of Eastern North America.

View the Oak Grove photo gallery.

  • The Allegheny Arboretum
  • Indiana University of Pennsylvania
    Robertshaw Building
    650 S 13th Street
    Indiana, PA 15705-1087
  • Phone: 724-357-3322