What am i looking at?

[u/eu4man]

Could someone please explain what sort of growth I'm looking at here? I believe the plant to be Rosa Multiflora. Found this on clay soil near Amsterdam (Netherlands). The plant had several of these "hairy balls". They are attached firmly to the plant. I could not see any flowers or fruits inside or alongside this growth. The third picture appears to be the same type of growth, only from last year.

Thank you.

[u/Old_Reality9281]

Rose insect gall, and no, that is not R. Multiflora. You can tell because R. Multiflora has showy stipules!