Introduction:
North American gall ID website
https://www.gallformers.org/

https://bygl.osu.edu/node/750 from https://www.inaturalist.org/observations/7931784

https://www.inaturalist.org/journal/twr61/19179-the-fungi-that-make-alder-tonge-galls from https://www.inaturalist.org/observations/3617467

New Zeland Leaf Galls
http://bts.nzpcn.org.nz/bts_pdf/Cant_1974_7__3-9.pdf from https://www.inaturalist.org/observations/33398335