Hiker's Guide to the Trees, Shrubs and Vines of Ricketts Glen State Park (PA)

Hiker's Guide to the Trees, Shrubs
and Vines of Ricketts Glen State Park

Chestnut Oak Leaf Gall Caused by the
Cynipid Wasp Acraspis quercushirta

Identification by Dr. Carol Mapes, Biology Dept., Kutztown Univeristy of PA.

Updated 25 October 2017.