Pungent Desert Parsley, Lomatium grayi, and early red oak leaf growth, Columbia River Gorge National Scenic Area, Washington

Ginko, Maidenhair tree, Gingko biloba, Single gree leaf among autumnal oak leaves, Wilsonville, Oregon, USA.

Oak, Autumnal colours of Aspen and Oak leaves in pond near Alpine, Oregon, USA.

Oak, Pin oak, Quercus palustris, Studio shot of backlit leaves.

Oak, Pin oak, Quercus palustris, Studio shot of backlit leaves.

Hydrangea, Oakleaf hydrangea, Hydrangea quercifolia 'Pee Wee', Close view of the small flowers that make up the inflorescences or clusters.

Common oak, Quercus robur, leaves infested with the common spangle gall caused by the cynipid wasp.

Sessile oak, Quercus petraea, snow covered leaf hanging on a twig.

Oak, Quercus.

Oak, Red oak, Quercus rubra.

Oak, Quercus robur.

Oak, Algerian, Algerian oak, Quercus canariensis.