Buddleja davidii (Butterfly-bush) flowers photographed in visible light (top), ultraviolet (middle), and infrared (bottom).
In visible light the flowers are purple with an orange centre. There is a slightly lighter area around the edge of the orange centre.
In ultraviolet light the flowers appear as roughly a single tone, with no lighter area around the centre.
In infrared the flowers also appear as roughly a single tone, with no lighter area around the centre.
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