3 replies to this topic

[Andy Perrin]

Perrin, A. (2016) Another example of Chelidonium majus L. (Papaveraceae) Greater Celandine. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...another-example

Brighton, Massachusetts, United States
5 May, 2016
Wildflower

Synonyms:
(reproduced from Rørslett (2012) example for convenience)

• NO: Svaleurt
  
• SE: Skelört
  
• DK: Svaleurt
  
• FI: Keltamo
  
• DE: Schöllkraut
  
• EN: Greater Celandine
  
• Chelidonium majus var. laciniatum (P. Mill.) Syme
  
• Chelidonium majus var. plenum Wehrhaln

Comment:
Rørslett (2012) first showed Chelidonium majus in ultraviolet⁽¹⁾. The flower is nearly all yellow in visible light, but the stamens turn black in UV while the rest of the flower remains yellow (in the standard white balance). According to the New England Wildflower Society, the sap is highly irritating. Chelidonium is widely distributed in Brighton.

Reference:
1. Rørslett, B. 2012. Chelidonium majus L. (Papaveraceae). Flowers photographed in visible and ultraviolet light.
2. New England Wildflower Society (6 June, 2016) Chelidonium majus L. (Papaveraceae). Greater Celandine.

Equipment:
Visible [iPhone 6S Plus]
Ultraviolet [Sony NEX-7-broadband + Novoflex 35/3.5 Noflexar + back-mounted Omega 330BW80 UV-Pass Filter ]

Visible Light [f/2.2 for 1/769" @ ISO-25 in Sunlight]


Ultraviolet Light [f/16(?) for 0.4" @ ISO-1600 in Sunlight with Omega 330BW80 UV-Pass Filter, Back-mounted]

[Andrea B.]

Congratulations, Andy, on your first formal botanical post!!!

Now, keep 'em coming!!!

I'll mention that we have been attempting to also UV photograph the abaxial (underneath) surface of the flower. And to aid in botanical IDs, remember to make reference photographs in situ of leaves (top & bottom), stems and general plant shape. Not all reference photos need be entered in the post. I sometimes post them in for 'difficult' flowers like hawkweeds.

(I made two very minor corrections: one to the reference string and the other was adding some bullets to the Synonyms.)

[Cadmium]

Andy, Wow, very nice shot!

[nfoto]

Always a good feeling to have completed a formal post ....

I try myself to remember to shoot both upper and lower side of the flower for any species, as mounting experience shows some flowers can show quite different UV rendition on either side.