Andrea B. Posted April 8, 2014 Share Posted April 8, 2014 Blum, A.G. (2014) Linum grandiflorum Desfontaines (Linaceae) Red Flax. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...lorum-red-flax/ Synonyms:Scarlet FlaxComment:An introduction to the US, L. grandiflorum has become naturalized in some areas.In UV the flower has a central UV-dark star inside a somewhat lighter central circular area. A diffuse version of this pattern is seen also in the Visible flower. Reference:1. Jepson eFlora (2014) L. grandiflorum Desf. Jepson Herbarium, U. of Cal.-Berkeley, Berkeley, CA. http://ucjeps.berkel...?4965,4980,4982 Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Set 1Boyce Thompson Arboretum, Superior, Arizona, USA24 April 2013Wildflower in botanical garden Visible Light [f/8 for 1/1600" @ ISO 400 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/8 for 1/200" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Set 2Desert Botanical Garden, Phoenix, Arizona, USA25 April 2013Wildflower in botanical garden Visible Light [f/11 for 1/200" @ ISO 100 with onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/100" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Link to comment
igoriginal Posted April 9, 2014 Share Posted April 9, 2014 Hmmm. After looking through some of your photos of flowers that are predominantly red in color (including from some of my own tests of red-dominant colored flowers) ... I am finding that the majority of them seem to turn white under UV reflected photography (particularly all of those with some type of observed centralized UV-dark scheme). This also includes flowers with petals that have hints of pink ("rose" red) but are still predominantly red. Not to say that all red-dominant flowers with UV-dark "bull's eye" centers do this ... but it seems like it is quite a common result (if they exhibit any UV brightness at all, that is). Is this hunch true, or is my UV sampling experience still limited? Link to comment
nfoto Posted April 9, 2014 Share Posted April 9, 2014 Limited experience might be the answer. Plenty of red-flowered species say from Caryophyllaceae, Geraniaceae, Rosaceae, and Asteraceae appear UV-dark whether or not they have central patterns in visible light. Link to comment
igoriginal Posted April 10, 2014 Share Posted April 10, 2014 Ahhh. I figured as much. ;) Back to work, I go. Link to comment
Andrea B. Posted April 10, 2014 Author Share Posted April 10, 2014 Here is a red Dianthus which is UV dark.http://www.ultravioletphotography.com/content/index.php?/topic/535-dianthus-chinensis-china-pink/ And a pink Dianthus which is UV dark.http://www.ultravioletphotography.com/content/index.php?/topic/544-dianthus-carthusianorum-carthusian-pink/ Link to comment
igoriginal Posted April 16, 2014 Share Posted April 16, 2014 Wow. Spectacular and hauntingly beautiful! Thank you! Link to comment
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