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Chamerion angustifolium [Rosebay Willowherb]


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Rørslett, B. 2013. Chamerion angustifolium (L.)Holub (Onagraceae). Rosebay Willowherb. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...bay-willowherb/

 

Chamerion angustifolium (L.)Holub

Syn. Chamaenerion angustifolium (L.) Scop nom. illeg.; Epilobium angustifolium L.

NO: Geitrams

SE: Mjölke; rallarros

DK: Gederams

FI: Maitohorsma

IS: Sigurskúfur

DE: Schmalblättriges Weidenröschen

EN: Rosebay Willowherb; Fireweed

 

This is a tall gregariously-growing perennial species with a wide Circumboreal distribution. Different subspecies have been described. It is a typical pioneer invader on fresh or sandy ground such as forest cuttings, road verges, railway embankments, and other disturbed habitats, man-made or natural. Flowering is typically in mid to late summer and the tall inflorescences with showy pale purple flowers are very eagerly visited by a variety of pollinators, large or small.

 

Plants collected near Oslo, Norway 23 Jul 2011.

 

CHAM_ANG_I1107237712_VIS.jpg

Image reference: CHAM_ANG_I1107237712_VIS.jpg

Visible light. Nikon D3, UV-Nikkor 105 mm f/4.5 lens, Baader UV/IR Cut filter, daylight.

 

CHAM_ANG_I1107237709_UV.jpg

Image reference: CHAM_ANG_I1107237709_UV.jpg

Ultraviolet light. Nikon D3, UV-Nikkor 105 mm f/4.5 lens, Baader U 2" (Venus) filter, Broncolor Minicom Studio flash (uncoated Xenon tube).

 

[Published 7 Feb 2013]

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  • 2 months later...
Hi, Bjørn, lurking around this forest of UV flowers here, I've found that you shot this flower with Nikon D3 both for VIS and UV. Have you modified it?
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Yes, for a while I had one modified as a broad-spectrum camera. However, I experienced a severe issue with IR contamination caused by its shutter monitor LED. In order to minimise the issue I had to shoot at maximum sync speed, i.e. 1/250 sec, and use studio flashes. Not a viable option over time for a field camera so I reset the camera to its factory condition and sold it off.
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