Andrea B. Posted October 18, 2013 Share Posted October 18, 2013 Blum, A.G. (2013) Echinacea Moench 'Marmalade' PP22602 (Asteraceae) Coneflower. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ade-coneflower/ Middletown, New Jersey, USA 24 June 2013 Cultivar in home garden Comment: In the last few years the hardy, drought tolerant Echinacea has become a very popular garden plant with many unusual cultivars being developed. In this particular hybrid double, the typical spiny center disc is replaced by a pompom. In UV the long outer rays are UV-dark with some narrow bright stripes, the pompom is UV-light and the center is UV-black. Reference: 1. Missouri Botanical Garden (2013) Echinacea 'Marmalade' http://www.missourib...file=0&letter=e Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/60" @ ISO 400 with onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/10" @ ISO 800 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Link to comment
nfoto Posted October 18, 2013 Share Posted October 18, 2013 The interesting aspect here is the manner in which this highly modified flower head still shows the UV signature of the original disc flowers (UV dark). Typical conical cell patterns are visible on the ligulate florets as well. Link to comment
Andrea B. Posted October 18, 2013 Author Share Posted October 18, 2013 It has always interested me how a cultivar might differ from its wild ancestor. :DThat is, how much does horticultural development affect the underlying UV-signature? Link to comment
nfoto Posted October 18, 2013 Share Posted October 18, 2013 If this specimen is typical, not much difference in the underlying UV signature ... Link to comment
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