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Parnassia palustris [Bog-Star]


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Rørslett, B. 2013. Parnassia palustris L. (Celastraceae). Bog-Star. Flowers fotographed in visible and ultraviolet light. http://www.ultraviol...stris-bog-star/

 

Parnassia palustris L.

NO: Jåblom

SE: Slåtterblomma

DK: Leverurt

FI: Vilukko

IS: Mýrasóley

DE: Sumpf-Herzblatt

EN: Bog-Star; Grass-of-Parnassus

 

Formerly placed in a separate family Parnassiaceae.

 

P. palustris is a small, up to 20 cm, perennial species with a wide circumboreal distribution in various races. It grows in a variety of biotopes, usually damp meadows and pastures in lowland areas. However, it can ascend into mountain ranges as well. The vernacular names in Norwegian and Swedish are derived from its flowering time that indicates hay can be cut in the fields. Flowering begins in July and continues into September.

 

The shiny white terminal flower is solitary on long scapes and has an outer series of 5 sterile staminoids followed by 5 inner fertile stamens. Each staminoid is equipped with drop-like false nectaria that glitter in the sun giving the flower a unique appearance. Evidently the advertising pays of as there are a wide variety of pollinators calling on the P. palustris flowers.

 

PARN_PAL_B1307207260_VIS.jpg

Image reference: PARN_PAL_B1307207260_VIS.jpg

Visible light: Nikon D800, Voigtländer 125 mm f/2.5 APO-Lanthar

 

PARN_PAL_I1307200736_UV.jpg

Image reference: PARN_PAL_I1307200736_UV.jpg

Ultraviolet light: Panasonic GH-2, Coastal Optics 60 mm f/4 APO lens, Baader U2" (Venus) filter, SB-140 flash.

 

The corolla of P. palustris is densely covered with conical cells making it shimmering in UV. The staminoids glitter in the UV light as well.

 

 

References:

http://www.ultraviol...-r%C3%B8rslett/

 

[Published 30 Jul 2013]

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