nfoto Posted June 23, 2013 Share Posted June 23, 2013 Rørslett, B. 2013 Platanthera bifolia (L.)Rich. (Orchidaceae). Lesser Butterfly-Orchid. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...tterfly-orchid/ Platanthera bifolia (L.)Rich.Syn. Habenaria bifolia (L.)R.Br.NO: Vanleg nattfiol; vanlig nattfiolSE: Nattviol; nattyxneDK: Bakke-Gøgelilje FI: ValkolehdokkiDE: Weiße Waldhyazinthe EN: Lesser Butterfly-orchid This is a medium tall, to 0.3-0.4m, orchid native to Europe and Western Asia in several races. It occurs on meadows often in forest clearings. In lowland regions it is fairly common on shaded habitats. Flowering occurs in late June or July and the shiny white flowers are sweetly fragrant in night-time. Nectar is profusely produced in long spurs requiring a pollinator with the ability to access this part of the flower, likely night moths or butterflies. Plants photographed at Hvaler, Southern Norway 27 June 2010. Specimens are the nominal race ssp. bifolia. Image reference: PLAT_BIF_I1006271507_VIS.jpgVisible light: Nikon D3S, UV-Nikkor 105 mm f/4.5 lens, Baader UV/IR Cut filter, daylight. Image reference: :PLAT_BIF_I1006275837_UV.jpgUltraviolet light: Nikon D200, UV-Nikkor 105 mm f/4.5 lens, Baader U2" (Venus) filter, daylight. In UV light, a lot of additional details appear. The presence of iridescent areas is striking and add to the signalling effect of these flowers. References:http://www.ultraviol...ure-references/ [Published 24 June 2013] Link to comment
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