The galls of this species ... are identical to those of R. pedicellata ... except for the lack of a pedicel. This difference is consistent and no intermediate forms were found. The galls are found on leaves, stems and inflorescences, are 6–12 mm long, 1–2 mm wide at the base, and tapered towards apex. Galls are often found in aggregations ...They are smooth, green to purplish-green with longitudinal darker lines, contain a single chamber, and are smooth and shiny on the inside.

Galls are monothalamous and green to purple. The biology is probably similar to that of pedicellata...Host: E. graminifolia...