Gall maker: Amphibolips sp. Gallers of the Amphibolips genus of gall wasps (Order Hymenoptera, Family Cynipidae) are numerous and often create oak apple galls such as those pictured.

Shape and Size: galls are globose "oak apples" roughly 2.5 cm in diameter.

Location: Occurring on various species of Quercus (oak) trees; these leaf galls often halt development of the leaf itself and appear to grow out of the bud.

Color: Varies, often light green to yellow with red or brown spots.