Buggy Joe!! What is that? Oak Apple Gall

Several types of "oak-apple" galls are now obvious on their namesake oak hosts in southern and central Ohio.  These unusual plant growths range in size at maturity from 1/2 - 2" in diameter and are named for their resemblance to apples.  The galls are constructed of various plant parts that have been hijacked by a gall wasp (Family Cynipidae) to surround a single wasp larva located within a seed-like structure positioned at the center of the gall.

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