Callirhytis milleri Melikaiella flora, formerly Callirhytis milleri, the live oak petiole gall wasp, is a species of hymenopteran that produces leaf galls on coast live oak, interior live oak, and canyon live oak trees in California in North America.

[1][2] The gall often subsumes the entire petiole and occasionally part of the leaf body.

[1] Pregnant females of the second generation oviposit on acorns; these acorns are usually dropped by the tree and become food for squirrels, deer, Steller's jays, etc.

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