ailanthus tree-old main-1001

ailanthus tree-old main-1001

ailanthus tree

This Ailanthus tree (tree-of-heaven) rests on the south side of Old Main on Penn State's University Park campus. While there have been no complaints about this particular Ailanthus, the plant's quick growth and spread has turned the tree into a major problem for foresters. Ailanthus was first imported to Pennsylvania in the late 1700s as a status symbol for rare plant collectors and botanists.

Image: Patrick Mansell
Licensing and Use