Oak Rough Bulletgalls

Oak Rough Bulletgalls are produced under the direction of the tiny gall wasp. The “rough” in the common name refers to the roughened appearance created by tiny hairs covering the surface. The sturdy galls can be round like a musket ball or slightly elongated like a Minie ball, which accounts for the “bullet” part of their common name.

Oak Rough Bulletgalls are at the hub of a buzz about wasps and flies swarming oaks belonging to the white oak group. The sturdy galls are produced under the direction of the tiny gall-wasp. The gall structure includes extrafloral nectaries that exude nectar to entice stinging and biting insects that provide protection.