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UltravioletPhotography

Ranunculus repens [Creeping Buttercup]


Andrea B.

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Blum, A. G. (2012) Ranunculus repens L. (Ranunculaceae) Creeping Buttercup. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ping-buttercup/

 

Southwest Harbor, ME, USA

14 July 2007

Wildflower

 

Comment:

I frequently find R. repens in lawns in Maine because its stoloniferous growth pattern helps it to survive the lawn mower. Note the stalked terminal leaflet and mottled leaflets which distinguishes it from the similar R. acris (http://www.ultraviol...tall-buttercup/) and R. septrionalis. In these buttercups the dark UV bullseye matches the visible bulleyes which are darker yellow than the rest of the corolla.

 

Reference:

1. Mittelhauser et al. (2010) Creeping Buttercup, page 296. The Plants of Acadia National Park. The U. of Maine Press, Orono, ME.

2. Newcomb, L. (1977) Creeping Buttercup, page 242. Newcomb's Wildflower Guide. Little, Brown & Co., New York City, NY.

3. Vignolini et al. (2011) Directional scattering from the glossy flower of Ranunculus: how the buttercup lights up your chin. Journal of the Royal Society Interface, v9 no71 pp1295-1301.

 

Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor]

 

Visible Light [f/16 for 1/180" @ISO 280 in Sunlight with Baader UVIR-Block Filter]

ranunculusRepensVis071407swhME_16317proofPnCrop.jpg

 

Ultraviolet Light [f/16 for 2" @ISO 280 in Sunlight with Baader UV-Pass Filter]

ranunculusRepensUV071407swhME_16319proofPnCrop.jpg

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