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Cymbalaria muralis [Ivy-leaved Toadflax]: Another Example


Nico

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Chalwatzis, N. 2013. More on Cymbalaria muralis (Scrophulariaceae) Ivy-leaved Toadflax. Flowers photographed in visible and ultraviolet light, including simulated bee colours. http://www.ultraviol...ample/#entry482

Cymbalaria muralis

 

Syn. Linaria cymbalaria

DE: Zimbelkraut, Zymbelkraut

EN: Ivy-leaved toadflax, Kenilworth Ivy

 

Flowers were photographed in Bensheim, Germany, 7 May 2013.

 

All images were taken with a broadband-modified Panasonic Lumix G1 and the EL-Nikkor 80mm/f5.6 at f8.

 

Visible light image with IR-neutralisation-filter ND (Optic Makario), ISO 100, 1/60s.

post-14-0-76002000-1369599626.jpg

image reference: NCH_P1080419130507

 

UV-image, Baader U-filter 2”, ISO 400, 8s, sunlight

post-14-0-18765500-1369599624.jpg

image reference: NCH_P1080418130507

 

 

“simulated bee-colours”: composite image of the UV image (-> blue) (greescale conversion) and the blue (-> green) and green (-> red) channel of the visible light image. The goal of this is to mimic the spectrum that bees and other insect-pollinators can see.

post-14-0-73545600-1369599621.jpg

image reference: NCH_P1080418_RGB_UV_bw130526

 

These tiny flowers are completely UV-dark in the centre and show a relatively weak UV-reflexion at the peripheral part of the petals. The pattern in the simulated bee-colour is more caused by the visible spectrum (blue channel). The low UV-reflexion causes the shift from white to yellow.

 

[published:26 May 2013]

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