Spangle gall

Spangle gall

Observation - Spangle gall - UK and Ireland. Description: On a large English Oak - Quercus robus - underside of the leaves. About 4mm in diameter.The Spangle gall on the underside of the oak leaf is a flat disc, with a distinct central elevation, slightly hairy, yellow-green at first and reddish later,

On a large English Oak - Quercus robus - underside of the leaves. About 4mm in diameter.The Spangle gall on the underside of the oak leaf is a flat disc, with a distinct central elevation, slightly hairy, yellow-green at first and reddish later,