Ultraviolet photo of a Hyacinthus orientalis plant in flower. In ultraviolet the flower petals appear quite dark, and have little variation in tone across the petal, unlike in visible light where the centre of each petal is a darker purple than the edge.
The throat of the flower appears much darker in ultraviolet than it does in visible light. What might appear to be a white ring shape around the centre of the flower in this photo is merely a reflection of the flash used to help light the image.
White balance adjusted and highlights reduced in ACR
Images blended for focus in PS CC
Slight yellow-green colouration towards the top of the frame removed in PS CC