Lamiastrum galeobdolon [Yellow Archangel]: Another Example

[Nico]

Chalwatzis, N. 2013. Another Lamiastrum galeobdolon (L.) Ehrend. & Polatschek (Lamiaceae). Yellow Archangel. Flowers photographed in visible and ultraviolet light, including simulated bee colours.

 

Lamiastrum galeobdolon (L.) Ehrend. & Polatschek

Syn. Galeobdolon luteum Huds., Lamium galeobdolon (L.) L.

NO: Gulltvetann, gulltvitann

SE: Gulplister, guldplister, gulsuga

DK: Guldnælde

FI: Keltapeippi

DE: Gemeine Goldnessel, Goldtaubnessel

EN: Yellow Archangel

 

UV-photos of this species have been published before (Rørslett 2013, http://www.ultraviol...llow-archangel/ )

However, subspecies of L. galeobdolon have been described and the flowers shown here have clearly a different UV-appearance.

 

Flowers were photographed near Bensheim, Germany on 24 May 2013.

 

All images were taken with a broadband-modified Panasonic Lumix G1 and the EL-Nikkor 80mm/f5.6 at f8.

 

Visible light image with IR-neutralisation-filter ND (Optic Makario), ISO 100, 1/60s.

image reference: NCH_P1080700130524

 

UV-image, Baader U-filter 2”, ISO 400, 4s, sunlight

image reference: NCH_P1080721130524

 

UV-image, Baader U-filter 2”, ISO 400, 6s, sunlight

image reference: NCH_P1080737

 

“simulated bee-colours”: composite image of the UV image (-> blue) (greescale conversion) and the blue (-> green) and green (-> red) channel of the visible light image. The goal of this is to mimic the spectrum that bees and other insect-pollinators can see.

image reference: NCH_P1080736_RGB_UV_bw130526

 

It’s interesting to see the variability of the UV appearance in this species. It is also very distinct from Lamium species like L. album (http://www.ultraviol...te-dead-nettle/ ).

 

[Published 26 May 2013]