Potentilla recta [Sulphur Cinquefoil]

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Rørslett, B. 2014. Potentilla recta L. (Rosaceae). Sulphur Cinquefoil. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...phur-cinquefoil

 

Potentilla recta L.

 

NO: Stormure

SE: Styv fingerört

DK: Rank Potentil

FI: Pystyhanhikki

DE: Hohes Fingerkraut

EN: Sulphur Cinquefoil

 

This is a perennial Potentilla capable of extending up to 1 m tall, but usually it is smaller. It occurs on dry meadows mainly on calcareous soils and is native to most of Europe. In the Nordic countries it is introduced and mainly is found on road verges, fallow fields, and other ephemeral habitats. The flowers are found in open terminal cymes and are quite big, usually at least 2 cm wide. A lot of pollinators frequent them.

 

Material collected in Tara Canyon national park, Montenegro, at an altitude of about 1100 m.a.s.l. 22 June, 2014.

 

Image reference: POTE_REC_G1406220807_VIS.jpg

Visible light: Nikon Df, Voigtländer APO-Lanthar 125 mm f/2,5 lens, daylight.

 

Image Reference: POTE_REC_I1406221683_UV.jpg

Ultraviolet light: Nikon D3200 (modified), Coastal 60 mm f/4 APO lens, internal Baader U2" (Venus) filter, SB-140 flash

 

In common with a number of other members of the Potentilla genus, P. recta exhibits large and prominent UV-dark marks on the petals. Sepals are UV-bright on the upper side and UV-dark on their lower side, so buds appear near black.

 

[Published 28 June, 2014]