Japanese maple, Sculpture and autumnal colours at Portland Japanese Garden, Oregon, USA.

Japanese Maple tree in autumnal colours, Portland Japanese Gardens, Oregon, USA.

Close up of autumnal colours and trunks of aspen trees, Inyo National forest, California, USA.

Close up of autumnal colours and trunks of aspen trees, Inyo National forest, California, USA.

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

Maple, Acer rubrum, Single autumnal coloured leaf.

Japanese Maple tree in autumnal colours, Portland Japanese Gardens, Oregon, USA.

Sumac, Cutleaf Sumac, Rhus glabra 'Laciniata', in autumnal colours, Hoyt Arboretum, Portland, Oregon, USA.

Tamarack or larch in autumnal color, North Cascades National Park, Washington, USA.

Trees in fog with sun streams, Willamette National Forest, Aufderheide National Scenic Byway, Oregon, USA.

Trees in fog with sun streams, Willamette National Forest, Aufderheide National Scenic Byway, Oregon, USA.

Trees in fog with sun streams, Willamette National Forest, Aufderheide National Scenic Byway, Oregon, USA.