You can say that I should have boosted the ISO, but I so hate the noise that can occur in UV photos. It is only about 3 minutes later than when the previous photo was made, but it was getting darker and rainier. Its face exhibits a kind of muddy false grey-yellow. bulbosus does not have a vibrant false colour. When I began shooting there was only drizzle and still a fair amount of light. The various optical effects from the raindrops were quite interesting. These photographs were all made in the rain, in a graveyard, while Bjørn and Kai stood by chuckling at my ergonomics after getting down on the sodden grass to make thse shots! Shooting in the rain tends to provide an artistic interpretation of a UV-signature rather than a documentary view. The buttercup has a nice false-cyan glowy inner base.īad shadows! But I thought it would be interesting to see a close leaf study in UV. That is not sensor dirt, that is flower dirt. The breezes have created a bit of motion blur in the anthers, but I wanted to show the photo anyway. This filter stack passes a bit of violet/blue which I could bring out in the converter. Two flashes were made during the 10" interval. Two flashes were made during the 8" interval. bulbosus plant in weedy strip of grass along with some veronica and dandelions.Įquipment Īll photos except the pollen details may be clicked up to 1200 pixels wide. New England Wild Flower Society (2018) Ranunculus bulbosus L. Norsk Rødliste for Arter (2010) Artsdatabanken, Norwegian Biodiversity Information Centre, Trondheim, Norway, page 173. Den virtuella floran (2014) Knölsmörblomma. The pollen on the anthers is UV-bright.ġ. The reproductive center parts are UV-black. The abaxial side of the corolla is UV-dark. It reflects some UV from its upper petals but not enough to brighten the rather dull false grey-yellow seen in the following UV photos. bulbosus flashes many specular highlights in all wavelengths due to the waxy surface of its petals. bulbosus growning amongst clover in a local park. The photos in Set 1 show a flower taken from a grassy area near a convenience store which has subsequently been mowed. bulbosus is a common sight in springtime. We found some growing in a cemetery in Mandal, Southern Norway where I photographed it in the rain, not an easy task. In Norway it is rare and red-listed as a vulnerable species. Ranunculus bulbosus, a common Eastern North American introduced weed, is a European native. ![]() Anthony's Turnip (because of the swollen bulbous base) Knölsmörblomma ('Lumpy Butterflower', Swedish).Knolliger Hahnenfuß ('Knobby Cocksfoot', German).Photos made with UV+Blue+Green filtration also shown. ![]() Flowers photographed in ultraviolet, visible and infrared light. Blum, Andrea G (2018) Ranunculus bulbosus L.
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