Eriophyes salicicola
Phytoptus salicola
Host: Salix longifolia [interior]
Leaf-gall, tiny, globular to irregular, often massed, on either surface of leaf, at times projecting through. .25-3 mm. across. Light green to completely crimson. July. Common.
”- PB Sears: (1914) Insect galls of Cedar Point and vicinity©
Reference: https://www.biodiversitylibrary.org/page/50337404#page/455/mode/1up