Infested inflorescence buds do not usually show any external signs of infestation, although they may appear somewhat wider than normal buds ... The larva feeds on the developing inflorescence within the closed bud, and the gall is accompanied by a white fungal mycelium that lines its internal walls.

[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]

Aborted flower bud... Asphondylia sp.
A central cell within the bud encloses the larva or pupa. Host: E. graminifolia.