on blue oak
Host: Garry oak
On California Scrub Oak. The large one with points
On Quercus lobata
Blue oak host. Sexgen.
Sexgen on Blue oak host
Sexgen on Blue oak
Blue oak host for sexgen
Opertus? On blue oak.
On Quercus garryana tended by European paper wasp.
Galls on leaf of OR white oak
I saw this on several old brown leaves, but couldn’t find any on green leaves