• Ultraviolet Photography

Comandra umbellata [Bastard Toadflax]

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#1 Andrea B.

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Posted 04 December 2013 - 18:09

Blum, A.G. (2013) Comandra umbellata (L.) Nuttall (Santalaceae) Bastard Toadflax. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...stard-toadflax/

Mesa Verde National Park, Montezuma County, Colorado, USA
02 May 2013

  • Comandra richardsiana Fern.
  • Thesium umbellatum L.
The Colorado subspecies is C.umbellata ssp. pallida. However, the genus Comandra contains only the single species C. umbellata with its subspecies.
This plant performs photosynthesis but also parasitizes the roots of nearby plants and so may be called a hemiparasite. The clusters of pink buds open to become a white flower with tinges of green. Unfortunately, C. umbellata is a host for a damaging pine fungus.
The blooming flower's sepals are UV-dark against the much lighter unopened buds.

1. Weber & Wittmann (2012) Comandra Nuttall, page 158. Colorado Flora: Western Slope, 4th Ed. The U. of Colo. Press, Boulder, CO.

[Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor]

Visible Light [f/8 for 1/200” @ ISO 100 with onboard Flash and Baader UVIR-Block Filter]
Attached Image: comandraUmbellataVisFlash_050213mesaVerdeNpCO_10674origPNres.jpg

Ultraviolet Light [f/8 for 1/200” @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter]
Attached Image: comandraUmbellataUVBaadSB14_050213mesaVerdeNpCO_10668pfPn2res.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.