Small, tan, oblong galls scattered along the lower (occasionally upper) midrib or major side veins of Quercus velutina, phellos, and imbricaria in clusters that are initially loose but become densely packed. The galls appear tan-yellow darkening to deep red but are densely covered in short, straight white hairs sometimes tinged with brown. They emerge from their veins in late September, but unlike Callirhytis piperoides, they emerge without causing noticeable swelling or patches of dead tissue. Their hairs are also much shorter than those of C piperoides.

Observed in September and October in Virginia on Quercus X leana 2 (imbricaria X velutina), phellos, velutina 2 3 4, 5, 6, and marilandica; in Ohio on Quercus velutina 2, in Virginia on Quercus falcata, and in Michigan on Quercus velutina. A possibly similar gall was seen in Missouri. Another was seen on Quercus nigra in Arkansas in October.

- Gallformers Contributors: (2024) Gallformers ID Notes^©