@az "Sorbus Aria" is called Mehlbeere (literally meal-berry) in German because it was often dried and milled, then added to flour. This is according to a favorite new book "Unsere essbaren Bäume und Sträucher"¹.
I only had a little taste out of curiosity and I can't report any side effects yet. But I know there are a bunch of varieties called Whitebeam so some of them might be inedible.

1. https://www.kosmos.de/buecher/ratgeber-naturfuehrer/natur/pflanzen/10157/unsere-essbaren-baeume-und-straeucher