Not sure if there's anybody still home, but you can still find the cute little galls on the leaf undersides, in this case Interior Live Oak. They make the live oak trees look pretty ratty though.
on Coast Live Oak
on Coast Live Oak
Valley oak
On Arroyo Willow
On Juglans hindsii
On White Alder. No new ones yet herr.
on California Sagebrush
on California Sagebrush
On Coyote Brush.
on Coyote Brush
3 or 4 on stems of Baccharis pilularis.