Fragrant Sumac Bladder Galls

Bladder galls are rising from the leaf surfaces of poison ivy and fragrant sumac. The galls on both plants are the handiwork of the Poison Ivy Leaf Gall Mite (Aculops rhois).

The distinctive-looking eriophyid mite bladder galls produced by the so-called Poison Ivy Leaf Gall Mite on Eastern Poison Ivy are now apparent. The irregular, wart-like, light green to reddish-green galls arise from the upper surfaces of the leaflets. Heavily galled leaves may be twisted and deformed.