ulf Posted July 3, 2021 Share Posted July 3, 2021 Wilhelmson, U. 2021. Verbascum speciosum Schrad. (Scrophulariaceae). Hungarian Mullein. Flowers photographed in visible, ultraviolet light and a combination of both. https://www.ultravio...garian-mullein/ Verbascum speciosum Schrad. NO: Praktkongslys SE: Praktkungsljus DK: Kandelaber-Kongelys DE: Pracht-Königskerze EN: Hungarian Mullein References: https://www.luontopo...t/showy-mullein http://alienplantsbe...ascum-speciosum https://commons.wiki...ascum_speciosum Comment: A plant native to eastern Europe and western Asia, Verbascum speciosum is known in many other regions as an introduced species and roadside weed. It is a biennial herb forming a rosette of large leaves and an erect stem well exceeding one meter in maximum height. The leaves are 30 to 40 centimeters long and have smooth edges and pointed tips. The plant blooms in a large panicle with many branches lined with flowers. Each flower has a corolla measuring 2 to 3 centimeters wide with five yellow petals. There are five stamens coated in long white hairs at the center. The fruit is a capsule up to 7 millimeters in length containing many seeds. The Hungarian Mullein is the most common Mullein species in Sweden with branched inflorescence. It is characterized by the fact that all stamens are symmetrically attached and that the two lower stamens also have hair on the stamens. Source: http://linnaeus.nrm....ba/verbspe.html Plants collected and photographed in the southern parts of Malmö, Sweden, October 2019, just before the first night frost destroyed the last flowers. All the pictures below show flowers from the same individual. Flower at the collection site: Images below by the same camera and light source: Camera: Canon EOS 60D, EL-Nikkor 80mm f/5.6 old metal type-lens Light source: two UV-converted Godox AD200 flashes with uncoated Quartz tubes Front of the flower, overviews Visible light Filter: Schott BG38, 2mm BUG3-stack image Filter: Schott S8612, 2mm + Schott BG3, 2mm BUG5-stack image Filter: Schott S8612, 2mm + Schott UG5, 1.5mm Ultraviolet Image Filter: Schott S8612, 2mm + Schott UG1, 1mm Front, close-up BUG3-stack image, Filter: Schott S8612, 2mm + Schott BG3, 2mm BUG5-stack image Filter: Schott S8612, 2mm + Schott UG3, 1.5mm Ultraviolet Image Filter: Schott S8612, 2mm + Schott UG1, 1mm Rear of the flower BUG3-stack image Filter: Schott S8612, 2mm + Schott BG3, 2mm BUG5-stack image Filter: Schott S8612, 2mm + Schott UG3, 1.5mm Ultraviolet Image Filter: Schott S8612, 2mm + Schott UG1, 1mm [Published 3 July 2021]. Link to comment
Fandyus Posted July 3, 2021 Share Posted July 3, 2021 Good post! I wonder if there are yellow plants out there that don't turn out yellow in UV. Link to comment
Stefano Posted July 3, 2021 Share Posted July 3, 2021 Yes, there are. Some "dandelions" are completely UV-black, for example. Link to comment
Fandyus Posted July 4, 2021 Share Posted July 4, 2021 Really? I suspect that's not the common species you find growing in the garden. Link to comment
Andy Perrin Posted July 4, 2021 Share Posted July 4, 2021 That’s the thing – dandelions don’t seem to have species really, if I understand right, it’s more like a continuum of varying genes. So you don’t know what you’ll find in your garden. But I have to say, I haven’t seen any all black ones yet. I definitely have seen some yellow flowers that turned out to be black, though. The plant called butter-and-eggs (yellow toadflax) is like that. Very shiny black. Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 There are many other that has a low UV-reflectance while being bright yellow in VIS. Two I remember quickly are:Bird's-foot trefoil, Lotus corniculatus L.https://en.wikipedia.org/wiki/Lotus_corniculatusTansy, Tanacetum vulgare L.https://en.wikipedia.org/wiki/TansyAndrea and Birna can for sure list many many more. Link to comment
Cadmium Posted July 4, 2021 Share Posted July 4, 2021 Ulf, Very interesting plant! :-) Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 I hope that the formal format is OK.I used Birna's post for Dark Mullein as a template. Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 Ulf, Very interesting plant! :-)Yes I agree.I had hoped to take better shots of this flower with my Sony A7III and photo stacking, but have private issues that is making it difficult for now to do more complicated setups.In the future I hope to explore many more flowers that way with bigger magnification. Link to comment
colinbm Posted July 4, 2021 Share Posted July 4, 2021 Fantastic Ulf especially with all the different lighting.I hadn't realised the furry bit was so small, when you showed it before. Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 The front close-ups above are reduced a bit to fit the page size in a proper way. They are not 100% crops Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 Fantastic Ulf especially with all the different lighting.I hadn't realised the furry bit was so small, when you showed it before.Thanks Col.Maybe I should select one of them and publish a big 100% crop in my gallery.They are really nice to zoom in on as pictures. Link to comment
nfoto Posted July 4, 2021 Share Posted July 4, 2021 Good post! I wonder if there are yellow plants out there that don't turn out yellow in UV. In fact, being "UV black" is very common among yellow flowers. There are examples too numerous to list e.g. in diverse families such as Cruciferae (Brassicaceae), Asteraceae, Scrophulariaceae and many others. Link to comment
ulf Posted July 4, 2021 Author Share Posted July 4, 2021 That’s the thing – dandelions don’t seem to have species really, if I understand right, it’s more like a continuum of varying genes. So you don’t know what you’ll find in your garden. But I have to say, I haven’t seen any all black ones yet. I definitely have seen some yellow flowers that turned out to be black, though. The plant called butter-and-eggs (yellow toadflax) is like that. Very shiny black.I think the "Dandelion" Stefano is referring to is some kind of Hawkweed. The Mouse-ear hawkweed, Pilosella officinarum is one of the species in that group that is UV-Black.https://commons.wiki...o=Go&type=image It is not a Dandelion Link to comment
nfoto Posted July 4, 2021 Share Posted July 4, 2021 The genus Tragopogon (Salsify, Goat's Beard) contains UV-black species. In one weird example, T. pratensis has two recognised subspecies, ssp. pratensis (nominal race) which is UV-yellow, whilst ssp. minor is UV-black. Except for the size of the flower head and the length of the phyllaries, both subspecies are identical to the naked eye. Andy mentioned butter-and-eggs (yellow toadflax) which is Linaria vulgaris, and it is indeed totally UV-black. Amongst the Crucifera (Brassicaceae), there are many genera containing UV-yellow and UV-black flowers for different species all with visually yellow flowers. Some good examples are seen in Brassica, Erysimum, and Bunias. Link to comment
Andrea B. Posted July 5, 2021 Share Posted July 5, 2021 That is a wonderful Mullein. Such an interesting structure. Link to comment
ulf Posted July 5, 2021 Author Share Posted July 5, 2021 Thank you Andrea, If you see anything wrong with the post's format, please feel free to do any corrections you like. Link to comment
Andrea B. Posted July 5, 2021 Share Posted July 5, 2021 Only a minor tweak or two. It looks good. Link to comment
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