Andrea B. Posted February 1, 2021 Share Posted February 1, 2021 Blum, A.G. (2021) Chaetopappa ericoides (Torr.) G.L.Nesom (Asteraceae) Rose Heath. Flowers photographed in ultraviolet, infrared and visible light. https://www.ultravio...des-rose-heath/ La Secuela, Santa Fe, New Mexico, USA15 May 2020Wildflower Synonyms:Aster arenosus (A.Heller) S.F.BlakeAster ericifolius Rothr. 1877 not Forssk. 1775Aster hirtifolius S.F.BlakeAster leucelene S.F.BlakeDiplopappus ericoides (Torr.) Torr. & A.Gray 1841 not Less. 1831Diplopappus ericoides var. hirtellus A.GrayInula ericoides Torr.Leucelene ericoides (Torr.) GreeneOther Common Names:Baby AsterBaby White AsterSand AsterSmallflower AsterWhite AsterComment:Small clumps of C. ericoides, about 4" tall, popped up in late April on our land and continued for some time. The plant hung in there during early dry spells with its petals curling under a bit. After rainfall the flowers perked up and more clumps appeared. It was gone by the hottest summer days this year, but is said to continue blooming until September in rainier summers. The common name references the heath-like leaves. Like other white asters, the Rose Heath is moderately absorbing in UV with pleasant false blue rays and very dark disc florets. Reference:1. Allred, Kelly W., Ivey, Robert DeWitt (2021) Flora Neomexicana III: An Illustrated Identification Manual, 2nd Edition, Part 2. Chaetopappa Key, page 117. Print on demand at lulu.com.2. Finley, Willa F., Nieland, Lashara J. (2013) Land of Enchantment Wildflowers. Chaetopappa ericoides, page 284. Texas Tech University Press, Lubbock, Texas.3. SEINet Arizona-New Mexico Chapter (acc 31 Jan 2021) Chaetopappa ericoides. This is a southwestern US biodiversity organization which uses the Symbiota portal software.4. Southwest Colorado Wildflowers (acc 31 Jan 2021) Chaetopappa ericoides. Website published and maintained by Al Schneider and hosted by Rocky Mountain Biological Laboratory5. Wildflowers of New Mexico (acc 2021) Chaetopappa ericoides. Website published and maintained by George Oxford Miller. Equipment [Nikon D610-broadband + Nikon 105mm f/4.5 UV-Nikkor]Unless otherwise noted. Visible Light [f/11 for 1/400" @ ISO-160 with D850 + Micro-Nikkor 60/2.8 in Sunlight] Visible Light [f/16 for 1/125" @ ISO-200 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/1.6" @ ISO-400 in Sunlight with BaaderU UV-Pass Filter] Infrared Light [f/11 for 1/320" @ ISO-200 in Sunlight with B+W 092 IR-Pass Filter] Link to comment
ulf Posted February 1, 2021 Share Posted February 1, 2021 It might be noted that the filter used for the NIR image, B+W 092, has a cut on wavelength of 695nm. This gives slightly wider range of false colours than a typical R72-filter, with a cut on wavelength of 720nm. Link to comment
Andrea B. Posted February 2, 2021 Author Share Posted February 2, 2021 Yes, I've always enjoyed using that B+W 092. Link to comment
Cadmium Posted February 2, 2021 Share Posted February 2, 2021 I really like that UV shot, very dynamic! B+W 092 is made of Schott RG695. And according to B+W's catalog, it is not coated, so should be exactly the same as RG695. Link to comment
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