Sonchus arvensis [Perennial Sow-Thistle]

[nfoto]

Rørslett, B. 2012: Sonchus arvensis L. (Asteraceae). Perennial Sow-Thistle. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...nchus-arvensis/

 

Sonchus arvensis L.

Syn. S. arvensis L. f. laevipes (W. D. J. Koch) Hiitonen S. arvensis L. ssp. uliginosus (M. Bieb.) Nyman S. uliginosus M. Bieb. (var. glabrescens), S. maritimus auct. (var. maritimus)

 

NO: Åkerdylle; vanlig åkerdylle (ssp. arvensis); snaudylle (ssp. uliginosus)

SE: Åkermolka

DK: Ager-Svinemælk

FI: Peltovalvatti

DE: Acker-Gänsedistel

EN: Perennial Sow-Thistle

 

A tall-growing species found on coastal shores, roadsides, and agricultural fields in Europe. Two main races, ssp. arvensis (including S. humilis Orlova and S. arvensis L. var maritimus Wahlenb.) and ssp. uliginosus (M.Bieb.)Nyman.

 

Specimen (ssp. arvensis) from: Hvaler municipality, Norway, August 2002

 

Nikon D1H, UV-Nikkor 105 mm f/4.5, Baader UV/IR Cut filter.

 

Nikon D1H, UV-Nikkor 105 mm f/4.5, Nikon FF + Wratten CC20C filter, SB-140 flash.

 

Do note that UV-dark areas of the flower head are shown in reddish hues with this camera and filter technology. So one should keep this fact in mind when comparing these pictures against other UV captures.

 

[Last update: 26 Dec 2012]