Andrea B. Posted January 26, 2015 Share Posted January 26, 2015 Blum, A.G. (2015) Penstemon parryi (A. Gray) A. Gray (Plantaginaceae) Parry's Penstemon. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ys-beardtongue/ Organ Pipe Cactus National Monument, Arizona, USA10 March 2012Wildflower Synonyms:Desert BeardtongueComment:Recognized by pollination ecologists as attracting large numbers of bees.1 Reference:1. Lady Bird Johnson Wildflower Center (2015) Penstemon parryi. University of Texas at Austin, Austin, TX. http://www.wildflowe...id_plant=PEPA24 Equipment [Nikon D300-broadband + Carl Zeiss 60mm f/4.0 UV-Planar] Visible Light [f/11 for 1/250" @ ISO-250 in Sunlight with Baader UVIR-Block Filter]In late afternoon sun the candy pink of this P. parryi is even more intense. Ultraviolet Light [f/11 for 1/250" @ ISO-250 in Sunlight with Andrea-U UV-Pass Filter]Anthers, pollen and hair tufts of P. parryi show some minor UV-reflection. Link to comment Share on other sites More sharing options...
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