Physoderma pulposum
Wallroth, 1833
on Aegopodium, Amaranthaceae
GALL
irregular pustules on the leaves, 1-2 mm large, initially hyaline, then greenish and finally brown; on all parts of the plant; also the plant shows characteristic tumors.

HOST PLANTS
Amaranthaceae, (Apiaceae), polyphagous
Aegopodium podagraria; Atriplex calotheca, littoralis, patula, prostrata; Chenopodiastrum murale; Chenopodium chenopodioides, glaucum, rubrum, urbicum; Dysphania botrys.
On Aegopodium relatively rare (Klenke & Scholler).

- Willem N. Ellis: (2021) Plant Parasites of Europe^©

Reference: https://bladmineerders.nl/parasites/fungi/blastocladiomyceta/blastocladiomycota/blastocladiomycotina/physodermatomycetes/physodermatales/physodermataceae/physoderma/physoderma-pulposum/