gall on white oak twig - Disholcaspis quercusglobulus
Elk Rock State Park, Lake Red Rock, Marion County, Iowa, USA
April 24, 2011
Size: ~15 mm diameter
Old, weathered gall on twig from uppermost branches of tall, mature White Oak (Quercus alba); accessible only because shoreline erosion had undermined and toppled the tree.
Images of this individual: tag all