Tupelo, Nyssa sylvatica, Close view of a sprig of vibrant orange autumn leaves.

Woodbine, Clematis virginia, A single white flower of the wild clematis.

Woodbine, Clematis virginia, A single white flower of the wild clematis.

Columbian lewisia, Lewisia columbiana

Runner bean, Phaseolus coccineus. Shelled beans of mottled black and purple colour with open, drying pod containing single bean lying on top.

Our Lords candle, Hesperoyucca whipplei. Spikes of creamy yellow flowers extending from rosette of stiff, spine tipped leaves. USA, California, Sequoia National Park,

Crabapple, Malus Ioensis.

Pair of bright yellow daisy-like flowers of Heliopsis helianthoides against green background.

USA, Arizona, Saguaro National Park, Saguaro cacti against blue sky.

USA, Arizona, Saguaro National Park, Saguaro cactus against blue sky.

USA, Arizona, Saguaro National Park, Saguaro cactus with raised ridged branches against blue sky.

USA, Arizona, Saguaro National Park, Saguaro cactus silhouetted against blue sky in soft light, framed by branches of another in foreground.

England, West Sussex, Crossbush, field of young green wheat, Triticum aestivum.

England, West Sussex, Crossbush, field of young green wheat, Triticum aestivum.

England, West Sussex, Crossbush, field of young green wheat, Triticum aestivum.

England, West Sussex, Crossbush, field of young green wheat, Triticum aestivum.

Sunflower, Helianthus, A field of sunflowers near Sandeep in the Dordogne, France

Poppy, Opium poppy, Papaver somniferum, Single red coloured flower growing outdoor.

Squash, Winter squash 'Sweet Dumpling', Cucurbita pepo 'Sweet Dumpling', Studio shot of green and yellow coloured fruit against white background.

Squash, Winter squash 'Sweet Dumpling', Cucurbita pepo 'Sweet Dumpling', Studio shot of green and yellow coloured fruit against white background.

Squash, Winter squash 'Golden Acorn', Cucurbita pepo 'Golden Acorn', Studio shot of orange coloured fruit against white background.

Squash, Winter squash 'Golden Acorn', Cucurbita pepo 'Golden Acorn', Studio shot of orange coloured fruit against white background.

Squash, Delicata squash, Cucurbita pepo 'Delicata', Studio shot of fruit against white background.

Squash, Carnival squash, Cucurbita pepo 'Carnival', Studio shot of single orange coloured fruit against white background.