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

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

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

Dahlia, red flower shot against similar colour backgound.

Dahlia, red flower shot against similar colour backgound.

Dahlia, red flower shot against similar colour backgound.

Godetia or Farewell to Spring, Clarkia amoena , manipultaed blue flower against a dappled blue background.

Opium poppy, Papaver somniferum, close up of a bud opening.

Sweet rocket, Dame's rocklet, Hesperis matronalis flower, purple flower cluster.

Sea holly, Eryngium variifolium close up of flower. ,

Sea holly, Eryngium variifolium close up of flower.

Sea holly, known as Miss Wilmott's ghost, Eryngium giganteum.