Andrea B. Posted July 11, 2013 Share Posted July 11, 2013 Blum, A.G. (2013) Perityle emoryi Torrey (Asteraceae) Emory's Rock Daisy. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...rys-rock-daisy/ Joshua Tree National Park, California, USALat [N33°43'09.5"] Lon [W115°48'43.2"]05 March 2012Wildflower Synonyms:Perityle emoryi Torr. var. nuda (Torr.) A. GrayComment:This Rock Daisy grows in coastal or Creosote Bush scrublands. It has UV-dark disc florets which show bright tips prior to opening. The ray florets are moderately UV-dark. Reference:1. Jepson eFlora (2013) Perityle emoryi. Jepson Herbarium, U. of Cal.-Berkeley, Berkeley, CA. http://ucjeps.berkel...IJM.pl?tid=4303 Equipment [Nikon D300-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/9.5 for 1/750" @ ISO 400 with Nikon D3S + Nikon 60mm f/2.8G Micro-Nikkor] Visible Light [f/9.5 for 1/750" @ ISO 400 with Nikon D3S + Nikon 60mm f/2.8G Micro-Nikkor] Ultraviolet Light [f/8 for 1/200" @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]The unopened disc florets have UV-bright tips. The UV-bright pollen grains are easily seen. Ultraviolet Light [f/8 for 1/100" @ ISO 200 with SB-14 UV-modified Flash and Baader UV-Pass Filter]UV light reveals some wear & tear on the ray florets of an older flower. Link to comment
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