nfoto Posted January 30, 2013 Share Posted January 30, 2013 Rørslett, B. 2013. Calendula officinalis L. (Asteraceae). Pot Marigold. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...s-pot-marigold/ Calendula officinalis L.NO: RingblomSE: Ringblomma; solsickaFI: Kehäkukka; TarhakehäkukkaDE: Ringel-Blume EN: Pot Marigold A widely cultivated species, C. officinalis is frequently found as a garden escapee but populations usually are fairly short-lived. It flowers from mid summer to late in autumn, in fact often until the first frost or snowfall arrives. Image reference: CALE_OFF_I0508099202_VIS.jpgVisible light. Nikon D70, UV-Nikkor 105 mm f/4.5. Image reference: CALE_OFF_I0508099203_UV.jpg Ultraviolet light. Nikon D70, UV-Nikkor 105 mm f/4.5, Hoya U-360 + B-W BG-38 filters, SB-140 flash.C. officinalis has UV-dark disc flowers and the ray florets have a large UV-dark patch at their basal part. Thus, the general impression of a dominant "bull's-eye" pattern is generated. Under UV light, the little spider hiding in the left flower head becomes very apparent. [Published 30 Jan 2013] Link to comment
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