Andrea B. Posted March 28, 2017 Share Posted March 28, 2017 Blum, A. G. (2017) Stellaria graminea (Ledeb.) Bong. (Carophyllaceae) Grass-leaved Stitchwort. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ved-stitchwort/ Southwest Harbor, Maine, USA07, 14 July 2014Wildflower Synonyms:Alsine graminea (L.) Britt.Stellaria graminea var. latifolia Peterm.Other Common Names:Lesser StitchwortComment:A key point of identification for S. graminea are the conspicuously veined sepals. The petals are moderately UV-absorbing. The sepals are UV-dark.In meadows and fields, the white Stitchwort flowers look like scattered stars across the green. Reference:1. New England Wild Flower Society (2014) Stellaria graminea (Ledeb.) Bong. Grass-leaved Starwort, Grass-leaved Stitchwort. https://gobotany.new...laria/graminea/ SET 1Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar] Visible Light [f/11 for 1.6" @ ISO-100 with Onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 25" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]A long exposure was made to permit multiple flashes for more even coverage. SET 2Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/16 for 1/5" @ ISO-100 in Sunlight with Baader UVIR-Block Filter]View of the veined sepals. Large crop. Ultraviolet Light [f/16 for 1/20" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]View of the dark sepals. Large crop. Ultraviolet Light [f/16 for 1/200" @ ISO-100 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]Different raw converters produce slightly different shades of the blue UV-false colour. Large crop. Link to comment
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