Presumed Diastrophus sp.
Wood beauty stem gall wasp
Host: Wood beauty (Drymocallis sp.).
Gall location: On the stem
Description: Globular galls similar to those of the cinquefoil stem spindle gall wasp (see page 39); galls of this species are often misidentified as that species. Range: Widespread, probably throughout the range of wood beauty in North America.
Galls have been reported on three wood beauty species (Drymocallis arguta, D. glandulosa, and D. lactea). The true inducer of these galls is entirely unknown but is presumed to be a gall wasp
”- Louis Nastasi, Charles Davis: (2022) Field Guide to the Herb and Bramble Gall Wasps of North America©