Andrea B. Posted December 29, 2012 Share Posted December 29, 2012 Blum, A.G. (2012) Ratibida columnifera (Nuttall) Wooton & Standley (Asteraceae) Prairie Coneflower. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...rie-coneflower/ Middletown, New Jersey, USA30 June 2007Wildflower in home garden Comment:This Coneflower was part of a wildflower seed packet that I grew in my garden. It typically grows in the prairies of the US and Canada and is also found in Mexico. The columnar disc is UV-bright until the UV-dark disc florets cover it as they open from the bottom up. Reference:1. Flora of North America Online. (2012) Ratibida columnifera, vol. 21, pp. 62-63. FNA. New York & Oxford. http://www.efloras.o...on_id=242417124 Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/250" @ISO400 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/1 for 1" @ISO400 in Sunlight with Baader UV-Pass Filter] Link to comment
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