These should be well known by nature people but I don't hear them discussed much. Today, because of this discussion, searching for some info, I found this inte

These should be well known by nature people but I don't hear them discussed much. Today, because of this discussion, searching for some info, I found this interesting trivia observation someone blogged about: you can use bog bilberry to clean the color off your bilberry blue fingers. The explanation likely being that they are slightly acidic (it's hard to remove with just water and soap.) https://www.godt.no/aktuelt/i/eK1GOO/baeret-som-fjerner-blaabaerfarge https://www.godt.no/aktuelt/i/eK1GOO/baeret-som-fjerner-blaa... These berries have many names in scanidinavia too, but in norwegian I would know them as «skinntryte».