Yep, this Basswood (Tilia americana), aka, American Linden tree is hosting mites. Fairly innocuous, the Spindle Galls (Eriophyid tilae), aka Nail Galls live inside these gall “homes” while feeding on the leaves. Other than causing appearance damage to the trees they are relatively harmless. https://en.wikipedia.org/wiki/Eriophyidae Copyright 2026 Pamela Breitberg
