leaf gall on pin oak - Amphibolips quercusostensackenii
State Capitol Campus, Des Moines, Polk County, Iowa, USA
May 5, 2010
Size: ~9 mm diameter
Single gall on edge of underside of leaf of ornamental pin oak (Quercus palustris) on lawn along urban street. Several other leaves on the same tree had single galls like this one.
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