green acorns close up. andricus quercuscalicis is a gall wasp species inducing knopper galls.

acorn agriculture autumn background backgrounds beauty botany branch brown cereal close color colored colors condition conservation crop deciduous defocused design environmental foliage food freshness fruit green group growth hanging horizontal image leaf lifestyles lush luxuriant macro natural nature non nut oak object objects organic outdoors part pattern photography plant scene season seed single tree twig unripe urban woodland