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.

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

Hare's tail,Lagurus ovatus and other wildflowers growing on rocks in a wild area with rubbish strewn in Halkidiki, Greece.

Oleander, Nerium oleander, bush and wildflowers by the beach in Halkidiki, Greece with rubbish strewn around, illustrating mans disregard of the beauty of nature.

Sow thistle, Sonchus oleraceus and other weeds growing in a neglected street container.

Sunflower seedlings, Helianthus annuus, An arrangement on white of different stages of the seed sprouting until the final one has shed its seedcase.

Citrus flower on white background, four views, two with stalk.

Cherry, Prunus, showing the difference between the defoliated tree above the trail and the healthy one below and the pollution from the aircraft flying over London?s East End.