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Hesperis matrionalis [Dame's Rocket]: More Examples

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#1 Andrea B.

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Posted 13 July 2017 - 17:46

Blum, A.G. (2017) Hesperis matronalis L. (Brassicaceae) Dame's Rocket. Flowers photographed in ultraviolet, visible and infrared light. http://www.ultraviol...-more-examples/

Seal Cove, Mount Desert Island, Maine
22 July 2017
Wildflower

Synonyms:
na

Comment:
Dame's Rocket can vary widely in colour from light or dark pink/magenta to reddish-purple to white. This white variant is moderately UV-reflective -- or, equivalently, moderately UV-absorbing. The center reproductive parts are UV-dark with brighter pollen.
Rørslett (2013) first showed Hesperis matronalis on UVP in ultraviolet(1). Blum (2013) showed an example of UV-variation in Hesperis matronalis(2).

References:
1. Rørslett, B. 2012. Hesperis matronalis L. (Brassicaceae). Dame's Rocket. Flowers photographed in visible and ultraviolet light.http://www.ultraviol...s-dames-rocket/
2. Blum, A.G. (2013) A UV Variant Example of Hesperis matronalis L. (Brassicaceae) Dame's Rocket. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ariant-example/
3. New England Wild Flower Society (2017) Hesperis matronalis L. Dame's Rocket. https://gobotany.new...ris/matronalis/


Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Click photos to view at 1200 pixels width (or height) in an expanded browser.

Visible Light [f/11 for 1/200" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]
Like other Brassicaceae, Dame's Rocket forms seed bearing cases called siliques.
Attached Image: hesperisMatronalis_visFlash_20140722sealCoveMdiME_23508pn01.jpg

Ultraviolet Light [f/11 for 5" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
A long exposure was used to permit a bit of sunlight to boost the UV-flash.
Attached Image: hesperisMatronalis_uvBaadSB14_20140722sealCoveMdiME_23512pn01.jpg


Visible Light [f/11 for 1/1.3" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]
Attached Image: hesperisMatronalis_visFlash_20140722sealCoveMdiME_23526pn01.jpg

Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
A long exposure was used to permit multiple UV-flashes.
Attached Image: hesperisMatronalis_uvBaadSB14_20140722sealCoveMdiME_23536pn01.jpg

Infrared Light [f/11 for 1/200" @ ISO-100 with Onboard Flash and B+W 092 IR-Pass Filter]
Attached Image: hesperisMatronalis_092IrFlash_20140722sealCoveMdiME_23544pn01.jpg


Visible Light [f/11 for 1/100" @ ISO-100 with Onboard Flash and Baader UVIR-Block Filter]ax
Abaxial view of the flowers.
Attached Image: hesperisMatronalisAbaxial_visFlash_20140722sealCoveMdiME_23562pn01.jpg

Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]
A long exposure was used to permit multiple UV-flashes.
Attached Image: hesperisMatronalisAbaxial_uvBaadSB14_20140722sealCoveMdiME_23570pn01.jpg
Andrea G. Blum
Often found hanging out with flowers & bees.

#2 Mark

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Posted 16 July 2017 - 17:01

I especially appreciate the second image in this post; which helps to prove/display UV absorbance vs reflectance within the image. This has me thinking about making a miniature or at least very small calibration target which can be easily included in UV images without being obtrusive to the composition.

#3 Andrea B.

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Posted 17 July 2017 - 14:26

That's a good idea. In order not to sacrifice composition, a UV photo could be shown which contains some targetry to establish the reflectivity record -- and then another more "artistic" version without the target(s) could also be shown.
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 Andy Perrin

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Posted 17 July 2017 - 14:50

Ooh, this one looks quite nice in UV, especially on the abaxial side!