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Chaetopappa ericoides [Rose Heath]

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#1 Andrea B.

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Posted 01 February 2021 - 01:48

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, USA
15 May 2020
Wildflower

Synonyms:
  • Aster arenosus (A.Heller) S.F.Blake
  • Aster ericifolius Rothr. 1877 not Forssk. 1775
  • Aster hirtifolius S.F.Blake
  • Aster leucelene S.F.Blake
  • Diplopappus ericoides (Torr.) Torr. & A.Gray 1841 not Less. 1831
  • Diplopappus ericoides var. hirtellus A.Gray
  • Inula ericoides Torr.
  • Leucelene ericoides (Torr.) Greene
Other Common Names:
  • Baby Aster
  • Baby White Aster
  • Sand Aster
  • Smallflower Aster
  • White Aster
Comment:
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 Laboratory
5. 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]
Attached Image: chaetopappaEricoides_vis_sun_20200522laSecuela_6790pnFin.jpg


Visible Light [f/16 for 1/125" @ ISO-200 in Sunlight with Baader UVIR-Block Filter]
Attached Image: chaetopappaEricoides_vis_sun_20200515laSecuela_19062pnResize.jpg


Ultraviolet Light [f/11 for 1/1.6" @ ISO-400 in Sunlight with BaaderU UV-Pass Filter]
Attached Image: chaetopappaEricoides_uvBaad_sun_20200515laSecuela_19079pnResize.jpg


Infrared Light [f/11 for 1/320" @ ISO-200 in Sunlight with B+W 092 IR-Pass Filter]
Attached Image: chaetopappaEricoides_ir092_sun_20200515laSecuela_19101pnResize.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 UlfW

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Posted 01 February 2021 - 07:09

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.
Ulf Wilhelmson
Curious and trying to see the invisible.

#3 Andrea B.

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Posted 02 February 2021 - 01:19

Yes, I've always enjoyed using that B+W 092.
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 Cadmium

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Posted 02 February 2021 - 05:14

I really like that UV shot, very dynamic! :smile:
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.

Attached Image: BW_Coated.jpg