Dryocosmus sp.
Brown-eye gall wasp
Host: a hybrid white oak
Galls are in small clusters on the ventral leaf midrib of a hybrid white oak in spring. Individual chocolate-brown monothalamous galls protrude from the tightly bound mass of white hairs.
Range: Santa Rosa Mountains, CA
”- Russo, Ronald A. : (2021) Plant Galls of the Western United States©