Opium poppy, Papaver somniferum, close up showing the stamens and stigma.

Love-in-a-mist, Nigella damascena, close up showing stamens against a blue background.

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

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

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

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

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.