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small, round, hard wasp gall on chinkapin oak leaf
wasp Andricus kollari, which lays eggs ...
Red gall on oak tree.about the size of a cherry.
http://www.kaweahoaks.com/html/galls_ofthe_voaks.html
Oak marble galls develop as a chemically induced distortion of leaf buds on oak ...
Fuzzy growth on an Oak leaf. Inside is a parasitic gall wasp.
Large apple-looking gall from the California Gall Wasp.
Three large red galls growing from the tree branch caused by the California ...
Small, red ball growing from mid rib on underside of leaf.
I saw this growth in a tree .It was at the base of the trunk,solitary and ...
Red and yellow, flat, disc-shaped gall. There are only female wasps of this ...
Fuzzy growth on the underside of the leaf. By early October, many of them had ...
Pink cone galls with white "hairs".
This gall is made by the parthenogenetic Cynipid gall wasp
A group of three green galls growing on a Gary oak tree. Ranging in size from 2 ...
Wart like looking bumps on green leaves. Not sure if this is part of the plant, ...
7. The Initiation Of Insect Galls The most fascinating galls are sometimes ...