Siberian iris, Iris sibirica 'Sparkling rose', purple flower against dappled background.

Siberian iris, Iris sibirica 'Sparkling rose', purple flower against dappled background.

Siberian iris, Iris sibirica 'Sparkling rose', purple flower against pale lilac coloured background.

Iceland poppy, Papaver nudicaule, front view showing stigma and stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Opium poppy, Papaver somniferum 'Danish Flag', red and white coloured flower showing fringed petals and stamens.

Opium poppy, Papaver somniferum 'Danish Flag', red and white coloured flower showing fringed petals and stamens.

Opium poppy, Papaver somniferum 'Danish Flag', red and white coloured flower showing fringed petals and stamens.

Opium poppy, Papaver somniferum 'Danish Flag', red and white coloured flower showing fringed petals and stamens.