Andrea B. Posted June 30, 2014 Share Posted June 30, 2014 Blum, A.G. (2014, 2017) More Examples of Potentilla recta L. (Rosaceae) Sulphur Cinquefoil. Flowers photographed in ultraviolet, visible, infrared and UV+B+G light. http://www.ultraviol...-more-examples/ Synonyms:Rough-fruited CinquefoilComment:Rørslett (2014) first showed Potentilla recta in ultraviolet(1). Here are more examples found in the USA which exhibit some differences in UV signature with a smaller UV-dark blotch on the petals. The visible flower here is usually a paler yellow than the European version. Reference:1. Rørslett, B. (2014) Potentilla recta L. (Rosaceae) Sulphur Cinquefoil. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...phur-cinquefoil2. New England Wild Flower Society (2014) Potentilla recta. Sulphur Cinquefoil. https://gobotany.new...tentilla/recta/3. Natural Resources Conservation Service (2014) Potentilla recta Plant Profile. US Department of Agriculture. http://plants.usda.g...le?symbol=PORE5 Set 1Gateway National Recreation Area, Sandy Hook Unit, New Jersey, USABoy Scount Camp29 May 2008Wildflower Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/750" @ ISO 400 in Sunlight with Baader UVIR-Block Filter]One petal is missing from the flower in these photographs. Ultraviolet Light [f/11 for 1" @ ISO 400 in Sunlight with Baader UV-Pass Filter] Set 2Gateway National Recreation Area, Sandy Hook Unit, New Jersey, USABoy Scount Camp01 June 2008Wildflower Equipment [Nikon D200-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/180" @ ISO 400 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1.5" @ ISO 400 in Sunlight with Baader UV-Pass Filter] Set 3Gateway National Recreation Area, Sandy Hook Unit, New Jersey, USA03-05 June 2010Wildflower Equipment [Nikon D700-broadband + Novoflex 35mm f/3.5 Noflexar] Visible Light [f/6.3 for 1/400" @ ISO 450 using Nikon D3]A small fly enjoys the Suphur Cinquefoil. Visible Light [f/6.3 for 1/400" @ ISO 1100 using Nikon D3 + Nikon 60mm f/2.8G Micro-Nikkor]P. recta shows an upright habit. Visible Light [f/6.3 for 1/400" @ ISO 1790 using Nikon D3 + Nikon 60mm f/2.8G Micro-Nikkor]The palmate leaf of P. recta. Most have 7 leaflets. Ultraviolet Light [f/8 for 1" @ ISO 200 with Nichia 365nm UV-LED and Baader UV-Pass Filter] UV-Induced Visible Fluorescence [f/8 for 1/2" @ ISO 200. Nichia 365 UV-Led + Baader UV-Pass Filter. Lens + Baader UVIR-Block Filter. Photographed in Darkness.]Note: This photo has not been formally colour-calibrated, so the colours of the fluorescence may not be entirely accurate.The pollen is fluorescent on the edge of the anthers. Set 4Gateway National Recreation Area, Sandy Hook Unit, New Jersey, USA09 June 2010Wildflower Equipment [Nikon D700-broadband + Carl Zeiss 60mm f/4.0 UV-Planar] Visible Light [f/11 for 1/50" @ ISO 650 with onboard Flash and Baader UVIR-Block Filter] Infrared Light [f/11 for 1/50" @ ISO 640 with onboard Flash and B+W 092 IR-Pass Filter] Set 5Shore Cottage, Southwest Harbor, Maine, USA06 July 2016Wildflower Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor]unless otherwise noted Visible Light [f/11 for 1/200" @ ISO-200 with Onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter] Ultraviolet Light [f/11 for 1/2,5" @ ISO-800 with SB-14 UV-modified Flash and AndreaU UV-Pass Filter]Best viewed when clicked up to 1000pixel width in an exanded browser. Infrared Light [f/11 for 1/160" @ ISO-400 in Sunlight with B+W 093 IR-Pass Filter] UV+Blue+Green [f/8 for 1/6" @ ISO-500 in Sunlight with UG5(1.5mm) + S8612(1.75mm)] Leaf DetailsVisible Light [f/8 for 1/400" @ ISO-250 with Nikon D800 + 60mm f/2.8G Micro-Nikkor in Sunlight] Visible Light [f/8 for 1/400" @ ISO-400 with Nikon D800 + 60mm f/2.8G Micro-Nikkor in Sunlight] Link to comment
nfoto Posted June 30, 2014 Share Posted June 30, 2014 Is the identification of this specimen verified? It looks quite dissimilar to the Potentilla recta plants I have seen from various European locations. These tend to have deep yellow flowers and all share the similar habitus with a stout upright stem and spreading terminal inflorescence, making the species easily identifiable in the field. It is noteworthy that the UV signature is different as well from those obtained from European material. Link to comment
Andrea B. Posted June 30, 2014 Author Share Posted June 30, 2014 What is identified as Sulphur Cinquefoil here in the US has a paler yellow flower.I was just about to post a 3rd set showing a leaf and a group of plants. I will of course consult the various keys and field guides to verify my ID. We have encountered this kind of difference before between the same species separated by an ocean. Link to comment
Andrea B. Posted June 30, 2014 Author Share Posted June 30, 2014 Here's are some Reference photos of our version of P. recta: https://gobotany.new...tentilla/recta/ and here too, US Dept of Agriculture - click the Images Tab: http://plants.usda.g...le?symbol=PORE5 Link to comment
msubees Posted July 1, 2014 Share Posted July 1, 2014 Potentilla is quite variable in its UV signature? I have seen a small, yellow one and totally dark under UV. Another pink one was also almost black in UV. Link to comment
Andrea B. Posted July 1, 2014 Author Share Posted July 1, 2014 There seem to be two types of Potentilla UV-signature posted on UVP so far. One type has UV-dark blotches on the petal end next to the flower center. The size of the black blotches may vary. The other type is uniformly UV-dark or moderately so. We have 2 of those: Potentilla atrosanguinea [blood Cinquefoil] and Potentilla crantzii [Alpine Cinquefoil] Let's see some more Potentilla if you have them !! :( Link to comment
msubees Posted July 1, 2014 Share Posted July 1, 2014 I do not know their species, but will post somewhere soon. One is a nice pink and similar to the red one here under UV. Link to comment
msubees Posted June 3, 2015 Share Posted June 3, 2015 I thought my pink species (or perhaps the yellow one also) was P. fruticosa. I photoed some white and some yellow yesterday, the white one is uv dark, but not black, and the yellow is much darker. It seems to a different cultivar of the same species. Link to comment
nfoto Posted June 3, 2015 Share Posted June 3, 2015 Potentilla fruticosa, now to be designated Dasiphora fruticosa, belongs to the yellow flowers that register UV dark all over. It has a development of conical cells though, so depending on the incoming illumination, the petals can display a lot of iridescence. Link to comment
msubees Posted June 4, 2015 Share Posted June 4, 2015 I have seen three color variations of D. fruticosa, pink, yellow, and white. they are black, black and deep blue under UV, respectively. Potentilla fruticosa, now to be designated Dasiphora fruticosa, belongs to the yellow flowers that register UV dark all over. It has a development of conical cells though, so depending on the incoming illumination, the petals can display a lot of iridescence. Link to comment
Andrea B. Posted January 20, 2017 Author Share Posted January 20, 2017 Added new example in first post which is getting rather long now. Link to comment
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