Small clumps of white fuzz, fading to tan or brown, in pinched areas of the leaf lamina, along the midrib, down the petiole and onto stems of new growth on Notholithocarpus densiflorus. The taxon responsible for this gall is not known but cf the fuzzy midge gall found on tan oak flowers.
”- Gallformers Contributors: (2024) Gallformers ID Notes©