A stiff, woody witches' broom involving the alteration of many shoots, buds and branches of Cercocarpus betuloides and C. ledifolius. This gall is often identified as Dasineura cercocarpi Felt on iNaturalist, however this is unlikely as that gall was originally described as producing bud galls. It has been posited that this gall may be D. cercocarpi in an early form.

Anyone finding this witches' broom could help by separating out one or two of the components that look like this, that is, like small bud galls with lots of white hairs and photographing them whole and also cut open, noting any signs of exit holes, gall chambers, or midge larvae. Quite a few photos of this broom gall look like they may contain multiple Dasineura cercocarpi galls, which would explain why an Internet source Nancy came across years ago mentioned a theory that the witches' brooms were induced by D. cercocarpi.

Observed in California 1, 2 in various months.

- Gallformers Contributors: (2023) Gallformers ID Notes^©