UV photograph of two Orange Welsh Poppy flowers (Meconopsis cambrica var. aurantiaca). One flower is has partly open petals so that the centre of the flower is visible. The other flower has the petals closed up and is bent over so that the side of the flower is visible.
A clear UV marking pattern can be seen in the flower that is open. The stamens and stigmas appear much darker than they do under visible light. The base of the petals are also slightly darker in ultraviolet. These markings, known as nectar guides, are used to help bees and other insects (which can see UV light) find the area of the flower where the pollen and nectar are located.
Meconopsis cambrica is endemic to uploand areas of Western Europe, preferring damp, shady places on rocky ground. It is especially well adapted to colonising gaps and crevices in rocks and stones. This habit has enabled it to colonise the urban environment, growing between paving slabs and at the edges of walls.
Description adapted from Wikipedia: http://en.wikipedia.org/wiki/Meconopsis_cambrica
Channel mixer used in PS CS5 to adjust colours
LCE applied in PS CS5