The small rosette galls develop only in apical buds and can be locally very common. These galls are composed of several shortened leaves that surround a single central, rigid chamber made of closely attached leaves, and are lined by white mycelium on the inside.

[this species was originally described by the authors of this paper; please refer to it for many more details of gall biology, insect life history, anatomy, and phylogeny]

- Netta Dorchin, Jeffrey B. Joy, Lukas K. Hilke, Michael J. Wise, Warren G. Abrahamson: (2015) Taxonomy and phylogeny of the Asphondylia species (Diptera: Cecidomyiidae) of North American goldenrods: challenging morphology, complex host associations, and cryptic speciation^©