Algerian iris, Iris unguicularis, Close cropped view of purple petal with yellow and white markings against pale blue background.

Algerian iris, Iris unguicularis, Close cropped view of purple petal with yellow and white markings against pale lilac background.

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

Cosmos bipinnatus 'Daydream', Front view of one fully open flower with white petals tinged with pink at the centre and yellow stamens, Against soft blue and pink background.

Cosmos bipinnatus 'Daydream', Front view of one fully open flower with white petals tinged with pink at the centre and edges, and yellow stamens, Against soft blue and pink background.

Cosmos bipinnatus 'Daydream', Front view of one opening flower, yellow stamens half hidden by white petals tinged with pink edges, Against soft focus blue background.

Greater Knapweed, Centaurea scabiosa, Close cropped view of fringed petals of white form of the pink flower, which is occasionally found, Selective focus against grey background.

Christmas cactus, Schlumbergera x bridgesii, Close view of one bright pink flower with swept back petals, white stamens and unusual star shaped pink stigma.

Greater Knapweed, Centaurea scabiosa, Front view of one flower showing spidery fringed petals, Soft focus stem, Against white background.

Harebell, Campanula rotundifolia, Close view of one mauve flower coming out of pale grey misty soft focus, Showing central white stamens.

White bryony, Bryonia dioica, Close side view of one tightly curled tendril loop against dark green.

Red cabbage, Brassica oleracea capitata, Very close abstract view of slice through cabbage forming purple and white pattern.