Ultraviolet Flowers

Glechoma hederacea L.
Glechoma hederacea. Visible light
Visible light
(L37C filter)

UV light
(FF + CC20C, SB-140)

UV fluorescence
(Sylvania Blacklight, L37C filter on lens)

Glechoma hederacea. IR light
IR light
(Wratten 89B, SB-140 with Wratten 87)
Nikon D1H, UV-Nikkor 105 mm f/4.5, @800 ISO

All images © Bjørn Rørslett/NN

Ground Ivy has no clear-cut bull's eye pattern, just a variegated flamed pattern of the flower, but shows plenty of everything else. The anthers both reflect UV strongly and exhibit a beautiful UV-mediated fluorescence as well. In common with so many other blue-hued flowers, there is a strong IR reflectance too thus explaining why the flower tends to turn out with a magenta cast on film and digital pictures.

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Last Update 30 May, 2003