Spectral comparison of the flowers of a Clematis montana cultivar. The top image shows the flowers in visible light, the middle image in ultraviolet light, and the bottom image in infrared light.
The petals do not have any UV markings visible, but the centre of the flower does appear much darker in ultraviolet.
The leaves and flowers both reflect similar amounts of infrared light.
This image is free for you to use and is licensed under the Creative Commons licence CC-BY-SA 3.0. If you use this image please credit Dave Kennard / www.davidkennardphotography.com.
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