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Photo#976202
l insect galls on oak tree - Andricus quercuscalifornicus

l insect galls on oak tree - Andricus quercuscalifornicus
Walnut Creek, contra costa County, California, USA
July 8, 2013

Moved
Moved from Unidentified Galls.

oak species?
Do you know if this was valley oak (Quercus lobata)? Also, do you remember if the gall had any fuzz on it at all?

The image is a little blurry, but the gall looks smooth to me (no fuzz), and your other gall image was from valley oak. Assuming this was a white oak of some sort, my guess is that this is a small and young Andricus quercuscalifornicus gall. Usually by July they are bigger than this one appears to be, but not always. Anyway, you may want to have a look at A. quercuscalifornicus and see what you think.

 
Andricus quercuscalifornicus
I agree!!!!

Moved
Moved from ID Request.

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