Below you will find images of a small selection of the galls that can be
found on the oaks and other plants located in Oak Grove Regional Park. Click on
the image to see a larger image.
California Gall Wasp gall (Andricus quercuscalifornicus), also known
as Oak Apples, forming, maturing and mature, ready for wasps to "hatch".
From left to right: California Jumping Gall Wasp gall (Neuroterus
saltatorius); Club Gall Wasp gall (Xanthoteras clavuloides);
Clustered Gall Wasp gall (Andricus brunneus).
From left to right: Convoluted Gall Wasp gall (Andricus confertus);
Disc Gall Wasp galls(Andricus parmula) on Blue Oak; Red Cone Gall Wasp
galls (Andricus kingi).
From left to right: Rose Blister Gall Wasp galls (Diplolepis rosaefolii);
Spiny Leaf Gall Wasp gall (Diplolepis polita) on California Rose;
Willow Apple Gall Sawfly galls (Pontania clifornica) on Arroyo Willow.