Ultraviolet Flowers

Sonchus oleraceus L.
Sonchus oleraceus. Visible light
Visible light
(L37C filter)

Sonchus oleraceus. UV light

UV light
(U-360,, SB-140)
Both images: Nikon D1H , UV-Nikkor 105 mm f/4.5 @800 ISO

© Bjørn Rørslett/NN

Annual Sow-thistle has lighter coloured flower heads than its relatives and the heads are much less conspicuous, too. Still, the bull's-eye floral pattern is strongly developed.

The flower head also reflects quite strongly in near-IR.

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Last Update 17 June, 2003