Causing deformation of fruits ("bladder plums," "plum pockets") and of twigs, sometimes with curling of leaves (not witches' brooms) of Prunus americana Marsh. P. [americana var.] lanata (Sudw.)
Mack, and Bush, P. hortulana Bailey ... P. maritima Marsh., P. rnunsoniana Wight and Hedr., P. nigra Ait., P. salicina Lindl., P. tarda [umbellata], P. umbellata
- AJ Mix: (1949) A monograph of the genus Taphrina©