Cosmos bipinnatus 'Purity' against a warm yellow background.

Cosmos bipinnatus 'Purity', single flower showing the yellow stamens in sharp focus, seen against a soft focus background.

Cosmos bipinnatus 'Purity', close up showing white petals partly in focus.

Anemone 'Wild Swan' close view from side showing stamen and grey-blue streak on the underside of the white petals.

Anemone 'Wild Swan' close view from side showing stamen and grey-blue streak on the underside of the white petals.

Anemone 'Wild Swan' close view from side showing stamen and grey-blue streak on the underside of the white petals.

Wind flower, Anemone leveille back view showing lilac underside of white flowers against an out of focus green and yellow dappled background.

Japanese anemone, Anemone x hybrida 'Honorine Jobert', side view of a single flower stem and buds against a dappled green background.

Japanese anemone, Anemone x hybrida 'Honorine Jobert', close up view showing orange stamen.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma.

Welsh poppy, Meconopsis cambrica, black and white of 2 flowers against a large area of solid black.

Globeflower, Trollius chinensis, black and white flower showing stamens and stigma, against a solid black background.