Andrea B. Posted July 8, 2017 Share Posted July 8, 2017 Blum, A. G. (2017) Eurybia macrophylla (L.) Cass. (Asteraceae) Large-leaved Wood-aster. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ved-wood-aster/ Shore Cottage, Southwest Harbor, Maine, USA01 August 2014Wildflower Synonyms:Aster ianthinus BurgessAster macrophyllus L.Aster macrophyllus L. var. apricensis BurgessAster macrophyllus L. var. excelsior BurgessAster macrophyllus L. var. ianthinus (Burgess) Fern.Aster macrophyllus L. var. pinguifolius BurgessAster macrophyllus L. var. velutinus BurgessComment:This E. macrophylla is not uniform in its UV-signature. It has moderately UV-absorbing ray and disk flowers, but with brighter edges and various lighter streaks. Some iridescence is at play also. Reference:1. New England Wild Flower Society (2017) Eurybia macrophylla (L.) Cass. Large-leaved Wood-aster https://gobotany.new...ia/macrophylla/2. Haines, A. (2011) Flora Novae Angliae. Asteraceae key, page 352. Asteraceae Group 4 key, page 361. Eurybia key, page 399. Yale University Press, New Haven, CT. Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar] From left to right:Visible Light [f/11 for 2.5" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]Visible Light [f/11 for 1/125" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter] Long UV exposures were made to permit multiple UV flashes for more even coverage. Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter] Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]Although having a bit of motion blur, this view better shows the just slightly more reflective disk florets. Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now