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Aubrieta deltoidea [Purple Rock Cress]

Fluorescence
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#1 Andrea B.

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Posted 12 April 2013 - 16:04

Blum, A.G. (2013) Aubrieta deltoidea (L.) de Candolle (Brassicaceae) Purple Rock Cress. Flowers photographed in ultraviolet, visible and infrared light. http://www.ultraviol...ple-rock-cress/

Comment:
Loves the rocks. Native to southeastern Europe. In Deep Cut Park these A. deltoidea plants have been growing happily for at least 25 years on and around a low rock wall and have become well naturalized, slowly spreading.
The edges of the petal in ultraviolet light are somewhat lighter than the central portion because of apparent iridescence. The visible veins radiating from the center carry over to become UV-black venation. The stigma and 4 stamens are UV-dark with some reflectivity where pollen is present. In UV the flowers do stand out somewhat against the mass of lighter foliage. A bee would probably see these flowers as a blue or bluish-cyan against "grey" foliage.

Reference:
1. Flora of North America Online (2013) Aubrieta deltoidea, vol. 7, pp. 269. FNA. New York & Oxford. http://www.efloras.o...on_id=242416161


SET 1
Deep Cut Gardens, Middletown, New Jersey, USA
08 April 2013
Wildflower in botanical garden

Equipment [Nikon D600-broadband + Nikon 105mm f/4.0 UV-Nikkor]

Visible Light [f/8 for 1/200" @ ISO 200 in Sunlight with Baader UVIR-Block Filter]
Attached Image: 600_4078ProofPn2Crop.jpg

Ultraviolet Light [f/8 for 1/2" @ ISO 400 in Sunlight with with Baader UV-Pass Filter]
Click the photo for a larger view.
Attached Image: 600_4086ProofPn2Crop01.jpg

Infrared Light [f/11 for 1/40" @ ISO 400 in Sunlight with with B+W 093 IR-Pass Filter (830nm)]
Attached Image: 600_4090ProofPn2Crop.jpg


SET 2
Deep Cut Gardens, Middletown, New Jersey, USA
24 April 2009
Wildflower in botanical garden

Equipment [Nikon D200-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Visible Light [f/11 for 1/250" @ ISO 400 in Sunlight with Baader UVIR-Block Filter]
Attached Image: aubrietaDeltoideaVisSun042409dc_28328pn.jpg

Infrared Light [f/11 for 1/250" @ ISO 400 in Sunlight with B+W 092 IR-Pass Filter]
Attached Image: aubrietaDeltoidea072IRSun042409dc_28331pn.jpg

Ultraviolet Light [f/11 for 1.5" @ ISO 400 in Sunlight with Baader UV-Pass Filter]
Attached Image: aubrietaDeltoideaUVSun042409dc_28343pn.jpg


SET 3
Deep Cut Gardens, Middletown, New Jersey, USA
06 April 2010
Wildflower in botanical garden

Equipment [Nikon D200-broadband + Carl Zeiss 60mm f/4.0 UV-Planar]

Visible Light [f/11 for 1/4" @ ISO-400 with onboard Flash and Baader UVIR-Block Filter]
Attached Image: aubrietaVisFlash040610deepCutMt_37307pnpnCrop.jpg

Ultraviolet Light [f/11 for 1/1.5" @ ISO-400 with Nichia 365nm UV-LED and Baader UV-Pass Filter]
The UV-Led was used supplementarily to reduce exposure time.
Attached Image: aubrietaUV365LED040610deepCutMt_37316pnpnCrop.jpg

Ultraviolet Light [f/11 for 1/1.5" @ ISO-400 with Nichia 385nm UV-LED and Baader UV-Pass Filter]
The UV-Led was used supplementarily to reduce exposure time.
Attached Image: aubrietaUV385LED040610deepCutMt_37319pnpnCrop.jpg

UV-Induced Visible Fluorescence [f/11 for 1.5" @ ISO-400. Nichia 365 UV-Led + Baader-UV-Pass Filter. Lens + Baader UVIR-Block Filter. Photographed outdoors inside box.]
Note: This photo was not formally colour-calibrated, so the colours of the Fluorescence may not be entirely accurate.
Attached Image: aubrieta365LedUVIVF040610deepCutMt_37311pn2.jpg


SET 4
Deep Cut Gardens, Middletown, New Jersey, USA
09 April 2011
Wildflower in botanical garden

Equipment [Nikon D200-broadband + Novoflex 35mm f/3.5 Noflexar]

Ultraviolet Light [f/8 for 1/2" @ ISO 200 in Sunlight with Baader UV-Pass Filter]
In UV the false-blue Aubrieta stand out against their foliage and the lichen covered rock wall.
Attached Image: aubrietaWall200_UV040911deepCutParkMtNJ_4239origpn.jpg

[Published 12 April 2013]
[Updated 18 December 2014]
Andrea G. Blum
Often found hanging out with flowers & bees.