The galls of this species were found by E. Fontes in May and June of 1982 around Gainesville, Florida (Fontes et al. 1994). They developed on young stems, and seemed to have stunted the growth of the apical meristem, because galled ramets were usually only 30 cm tall and atypically branched under the galls. The galls are oval with a tapered tip, single-chambered, grayish, and are typically aggregated around a stem to form a “star-like” structure. Galls found in August were already dry except for one or two records.
”- Netta Dorchin, Miles V. McEvoy, Todd A. Dowling, Warren G. Abrahamson, Joseph G. Moore: (2009) Revision of the goldenrod-galling Rhopalomyia species (Diptera: Cecidomyiidae) in North America©