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.

Lone oak tree in field, Wilsonville, Oregon, USA.

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

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

Oak, Common oak, Quercus robur, Autumn leaves covering fallen acorns.

Oak, Acorn, Quercus, Close up of green acorns growing on the tree.

Macadamia nut, Macadamia integrifolia, Aerial view of mass of brown coloured nuts,

Oak, Quercus robur, Acorns growing on the branches of tree in late summer.

Oak, Common oak, Quercus robur, Side view of fairly mature tree with no leaves, silhouetted against the misty dawn sky in an English field.

Sessile oak, Quercus petraea, Aerial view of many wet, fallen brown leaves and an acorn.