Cynips douglasii

Cynips douglasii, the spined turbaned gall wasp, is a species of gall wasp in the family Cynipidae. It induces galls in valley oaks, blue oak, and California scrub oak. The leaf galls induced by the parthenogenic, unisexual generation in summer are noted for their spines and can be white, purple, or pink. They can be up to 10 mm wide and 15 mm high. Adult females emerge from these galls in winter. The bisexual generation induces rounder, green bud galls in spring.