? on Galium verum
Galium verum, Zwanenwater
the axis of a small part of the inflorescence is galled
higher up in the inflorescence also leaflike elements are included
here the gall also is larger, and multilocular
the galls burst open
parasitised larva; the inner wall of the gall has no mycelial lining
Possibly the gall is caused by Geocrpyta galii, that normally galls part of the stem.