Phytoptus laevis (Actinedida: Eriophyidae) Alder Bead Gall Mite Angelo Coast Range Reserve, Mendocino County, California June 17, 2012 Blister galls on alder (Alnus rhombifolia) leaf, caused by mites.
Blister galls on alder (Alnus rhombifolia) leaf, caused by mites.