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Erysimum cheiri [Wallflower]


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Rørslett, B. 2013. Erysimum cheiri (L.)Crantz (Brassicaceae). Wallflower. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...iri-wallflower/

 

Erysimum cheiri (L.)Crantz

Syn. Cheiranthus cheiri L.

 

NO: Gyllenlakk,; gyldenlakk

SE: Gyllenlack; lackviol

FI: Tavallinen kultulakka

DE: Goldlack

 

This is a biannual to perennial species native to southern Europe and having a long-standing history as an ornamental plant thanks to its fragrant flowers. It is introduced outside its native region mainly from garden escapes. A great variety of cultivated forms exist and flower colours can range from native deep yellow to magenta, pink, or orange, sometimes with variegated patterns prevailing.

 

Plants collected from a refuse heap in London, UK 31 May 2013.

 

ERYS_CHE_G1305319706_VIS.jpg

Image reference: ERYS_CHE_G1305319706_VIS.jpg

Visible light: Nikon D3S, AFS-Nikkor 24-70 mm f/2.8 lens, daylight.

 

ERYS_CHE_V13053100003_UV.jpg

Image reference: ERYS_CHE_V13053100003_UV.jpg

Ultraviolet light: Panasonic GH-2, Coastal Optics 60 mm f/4 lens, Baader U 2 (Venus) filter, daylight. [snapshot from a UV video].

 

E. cheiri shows a strong bull's-eye type marking on the basal petals. This appearance is similar to that exhibited by its smaller relative, E. cheiranthoides http://www.ultravioletphotography.com/content/index.php?/topic/48-erysimum-cheiranthoides-little-wallflower/ .Veins on the petals are pronounced because of their low UV reflectivity. The buds are rather UV dark as well.

 

[Published 4 June 2013]

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