Ultraviolet Flowers

Rosa dumalis Bechst.
Rosa dumalis. Visible light
Visible light
(L37C filter)
Rosa dumalis. Ultraviolet light
UV light
(U-360 + CC20C, SB-140)
Nikon D1H, UV-Nikkor 105 mm f/4.5, @800 ISO

Both images © Bjørn Rørslett/NN

This pinkish-flowered species exhibits UV-absorbing petals all over, but the degree of UV absorbance does vary with the flower so presumably some kind of UV pattern emerges. More to the point is the fact that the bracts reflect UV quite strongly.

Other Rose species may behave differently from the Glaucous Dog-Rose as far as UV pattern is concerned.

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Last Update 3 August, 2004