| Knautia arvensis (L.) Coult. |
| Dipsacaceae |
 |
| Visible light |
 |
| UV
light (FF + CC20C, SB-140) |
| Both
images: Nikon D1H @800 ISO, UV-Nikkor 105 mm f/4.5 © Bjørn Rørslett/NN |
| The UV marks on the petals constitute a chequered pattern set off from the central flower head. |
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Last Update 1 October, 2002