causes irregular, wartlike, rough-looking galls on the upper surface of the leaves of seep willow [Baccharis glutinosa Pers.] and mule-fat [Baccharis salicifolia]
”- Hartford Keifer, Edward Baker, Tokuwo Kono, Mercedes Delfinado, William Styer: (1982) An Illustrated Guide to Plant Abnormalities Caused by Eriophyid Mites in North America©