Andrea B. Posted July 21, 2014 Share Posted July 21, 2014 Blum, A. G. (2014) Trifolium hybridum L. (Fabaceae) Alsike Clover. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...-alsike-clover/ Synonyms:Alsatian CloverTrifolium elegans SaviTrifolium hybridum ssp. elegans (Savi) Aschers. & Graebn.Trifolium hybridum var. elegans (Savi) Boiss.Trifolium hybridum var. pratense Rabenh.Comment:A key point of differentiation between T. hybridum and its creeping cousin T. repens is that T. hypridum's stipules have free tips and its leaves have no lighter markings on the top surface.Like Red Clover and White Clover, in Ultraviolet light Alsike Clover is primarily UV-dark with some patches of reflectivity on the floret banner due to the angle of the light. Reference:1. New England Wild Flower Society (2014) Trifolium hybridum L. Alsike Clover. https://gobotany.new...olium/hybridum/2. Mittelhauser et al. (2010) The Plants of Acadia National Park. Alsike Colver, page 191. The U. of Maine Press, Orono, ME. Set 1Southwest Harbor, Maine, USA08 July 2014Wildflower Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/4.5 for 1.3" @ ISO 100 with onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/16 for 20" @ ISO 100 with SB-14 UV-modified Flash and Baader UV-Pass Filter]A long exposure was taken so that the UV flash could be fired 3 times for even lighting. Visible Light [f/11 for 2.5" @ ISO 100 with onboard Flash and Baader UVIR-Block Filter]Unmarked leaf and free-tipped stipule. Visible Light [f/9 for 1/800 @ ISO 400 with Nikon Df + 60/f2.8G AFS Micro-Nikkor]A patch of Alsike Clover in a Maine meadow. Set 2Southwest Harbor, Maine, USA13 July 2007Wildflower Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/16 for 1/125" @ ISO 280 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/16 for 1.5" @ ISO 280 in Sunlight with Baader UV-Pass Filter] Link to comment
Andrea B. Posted April 6, 2017 Author Share Posted April 6, 2017 Set 3Shore Cottage, Southwest Harbor, Maine, USA01 August 2015Wildflower Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] f/11 for 1/8" @ ISO-800UG-5 (1.50mm) + S8612 (1.75mm) Filter StackSun f/16 for 1/13" @ ISO-200B+W 093 IR-Pass FilterSun f/11 for 1/250" @ ISO-200Baader UV/IR-Cut Filter + SB-14 + Sun f/11 for 8" @ ISO-200BaaderU UV-Pass FilterSun f/11 for 3" @ ISO-400CopperU UV-Pass FilterSun Link to comment
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