nfoto Posted June 3, 2013 Share Posted June 3, 2013 Rørslett, B. 2013. Erysimum cheiri (L.)Crantz (Brassicaceae). Wallflower. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...iri-wallflower/ Erysimum cheiri (L.)CrantzSyn. Cheiranthus cheiri L. NO: Gyllenlakk,; gyldenlakkSE: Gyllenlack; lackviolFI: 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. Image reference: ERYS_CHE_G1305319706_VIS.jpgVisible light: Nikon D3S, AFS-Nikkor 24-70 mm f/2.8 lens, daylight. Image reference: ERYS_CHE_V13053100003_UV.jpgUltraviolet 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] Link to comment
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