Andrea B. Posted January 15, 2013 Share Posted January 15, 2013 Blum, A.G. (2012) Erigeron divergens Torrey & A. Gray (Asteraceae) Spreading Fleabane. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ading-fleabane/ Visitor's Center, Death Valley National Park, Furnace Creek, California, USA29 February 2012 (Leapday)Wildflower Comment: The nodding buds clinched the ID for this Erigeron growing in the gravel at the Visitor's center. It has a UV-dark signature typical of fleabanes. Here the open disk flowers on the circumference show a little brighter in the UV. Reference:1. Flora of North America Online. (2013) Erigeron divergens, vol. 20, pp. 339. FNA. New York & Oxford. http://www.efloras.o...on_id=2500665852. Cal Photos. (2013) Erigeron divergens. Biodiversity Sciences Tech. Group, U. of Cal.-Berkeley, Berkeley, CA. http://calphotos.ber...id=&max_rows=243. Jepson eFlora. (2013) Erigeron divergens. Jepson Herbarium, U. of Cal.-Berkeley, Berkeley, CA. http://ucjeps.berkel...IJM.pl?tid=2662 Equipment [Nikon D300-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/8 for 1/2000" @ ISO 200 in Sunlight using a Nikon D3S + Nikon 60mm f2.8G Micro-Nikkor] Visible Light [f/11 for 1/400" @ ISO 200 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/250" @ ISO 640 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Link to comment
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