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 Contributed by John Pearson on 24 April, 2011 - 4:19pm Last updated 24 April, 2011 - 9:52pm |