Deforming fruits and all floral parts of Prunus alabamensis Mohr, P. virginiana L., P. virginiana L. var. demissa Torr., and P. virginiana L. var. melanocarpa Sarg.

[This source seems to suggest that Taphrina confusa may also gall leaves, shoots, and petioles.]

Taphrina confusa ... gall [s]imilar to T. padi, but on different host plants.

[Taphrina padi page] less conspicuously, probably also less frequently, also leaves and young shoots are galled.

[Note that Mix had described T. padi, a European gall, simply as "Causing deformed fruits (pockets)."]