Aceria baccharices, also known as the mulefat leaf-blister mite and formerly known as Eriophyes baccharices, is a species of arachnid native to North America that induces galls on two California willows, Baccharis salicifolia and Baccharis glutinosa.

[3] According to Keifer, "the typical host is the long-leaf type Baccharis which is common to dry washes in northern California.

"[3] These galls, which look like warty protrusions from the surface of the leaf, are nurseries for the next generation of mites.

[2] The adults eventually leave the leaf via anterior exit holes that may be visible.

This article about a mite or tick is a stub.