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UltravioletPhotography

Calystegia sepium [Hedge Bindweed]


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Rørslett, B. 2013. Calystegia sepium (L.)R.Br. (Convolvulaceae). Hedge Bindweed. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...hedge-bindweed/

 

Calystegia sepium (L.)R.Br. (s.lat.)

Syn. Convolvulus sepium L.

NO: Strandvindel

SE: Snårvinda

DK: Gærde-Snerle

FI: Karhunköynnös

DE: Gemeine Zaunwinde

EN: larger bindweed; hedge bindweed; Rutland beauty; bugle vine; heavenly trumpets; bellbind

 

A cosmopolitean species occurring in a number or races often treated as subspecies, sometimes with specific rank, it is a climbing perennial vine with showy large trumpet-shaped flowers. The natural habitats are shorelines and marshes above the high-water mark, hedges, forest edges, and similar ecotonal locations. Some forms are cultivated for their large flowers. It grows fast and has a deep root system and rich seedset, so frequently considered a noxious weed in gardens and on agricultural land.

 

The prevailing colours of the corolla are pale pink or cream white, but purple varieties also are often seen. The flowers, which open in sunshine but close in a twisted fashion otherwise, are eagerly visited by a number of pollinators of all sizes, from small hoverflies to large bumblebees and butterflies. Buds are always twisted anti-clockwise. Flowering commences late June and can continue until September, sometimes even later.

 

Plants recorded near Risør, southern Norway, 19 Jul 2010 (ssp. sepium).

 

CALY_SEP_I1007190738_VIS.jpg

Image reference: CALY_SEP_I1007190738_VIS.jpg

Visible light. Olympus E-P2, Olympus 14-42 mm f/3.5-5.6 lens, daylight.

 

 

CALY_SEP_I1007191177_UV.jpg

Image reference: CALY_SEP_I1007191177_UV.jpg

Ultraviolet light. Nikon D40X, UV-Nikkor 105 mm f/4.5 lens, Baader U 2" (Venus) filter, daylight.

 

There is a dominant central "bull's eye" UV mark, made even more apparent by being encircled with a medium UV-bright section outside it. Presence of conical cells is evident in this brighter zone. Note epidermal damage on the corollas, caused by recent rain, that becomes clearly visible under UV light.

 

[Published: 17 Jan 2013]

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