Plum-gall
Guides
Amphibolips quercusjuglans
Acorn Plum Gall Wasp
Amphibolips quercusjuglans, commonly known as the acorn plum gall wasp, is a cynipid gall wasp that induces distinctive plum-like galls on acorns of oak trees (Quercus spp.). The species is part of a large radiation of gall-forming wasps specialized on oaks in North America. Its galls are among the most visually striking of oak galls, developing on the cupule or acorn itself rather than on leaves or stems.