Enlarged, aborted seed capsule...Asphondylia vernoniae Felt

Galls are globular with longitudinal ribs, dark green, often purple at apex. Adults emerged in autumn...Host: V. novaboracensis and possibly also V. blodgettii

Asphondylia vernoniae Felt is a bivoltine species that produces a summer apical gall flower gall on Vernonia noveboracensis (Linnaeus) and a spring crown gall at the base of the plant the following May.