Andrea B. Posted April 16, 2021 Share Posted April 16, 2021 Blum, A.G. (2021) Galinsoga quadriradiata Ruiz & Pav., 1798 (Asteraceae) Gallant Soldiers. Flowers photographed in ultraviolet and visible light. https://www.ultravio...llant-soldiers/ Holmdel Park, Holmdel, New Jersey, USA27 Aug 2013Wildflower Synonyms:Adventina ciliata Raf.Ageratum perplexans M.F.JohnsonBaziasa urticifolia (Kunth) Steud.Galinsoga aristulata E.P.BicknellGalinsoga bicolorata H.St.John & D.WhiteGalinsoga brachystephana RegelGalinsoga brachystephana Otto ex Heer & RegelGalinsoga caracasana (DC.) Sch.Bip.Galinsoga ciliata (Raf.) S.F.BlakeGalinsoga eligulata Cuatrec.Galinsoga hispida Benth.Galinsoga humboldtii Hieron.Galinsoga plikeri Giacom.Galinsoga urticifolia (Kunth) Benth.Jaegeria urticaefolia (Kunth) Spreng.Jaegeria urticifolia (Kunth) Spreng.Sabazia urticifolia (Kunth) DC.Stemmatella urticifolia (Kunth) O.Hoffm. ex Hieron.Vargasia caracasana DC.Wiborgia brachystephana Heynh.Wilborgia urticifolia KunthOther Common Names:Common QuickweedFringed QuickweedHairy GalinsogaPeruvian DaisyShaggy SoldierComment:The genus Galinsoga apparently was apparently misunderstood at some time in the past and became corrupted into the common name Gallant Soldiers. The tiny flower is UV-absorbing against much UV-lighter foliage. Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/100" @ ISO-800 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/8 for 1/2" @ ISO-1250 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]I rarely use such high-ISO, but the plant was in deep shade.The foliage is more UV-reflective than the very UV-dark little flower rays. Link to comment
Stefano Posted April 16, 2021 Share Posted April 16, 2021 It looks so cool in UV! I'm guessing the leaves are reflecting the UV-yellow sky in the photo. Link to comment
nfoto Posted April 16, 2021 Share Posted April 16, 2021 An inconspicuous species that has become near cosmopolitean in distribution. We saw it "invading" (which, strictly, is not the apt descriptor for this harmless little creature) northern Europe through ballast dumping by tall ships in the 1800's. All the endearing old seaside ports and tiny cities along the southern coastline have it as a characteristic element on any open patch of earth. Its close relative, Galinsoga parviflora, led the first wave of invasion, but has become much rarer these days due to the competitive advantage of the bigger G. quadriradiata. "Big" of course being used in a relative sense as neither are tall. Link to comment
colinbm Posted April 17, 2021 Share Posted April 17, 2021 Nice flower Andrea, how small are they please ? Link to comment
Andrea B. Posted April 17, 2021 Author Share Posted April 17, 2021 Thanks, all. This particular species is native to Mexico. Interestingly, we don't seem to have it in New Mexico. Col, the yellow center disc is about 5 mm in diameter. The petals thus are probably about 4 mm in length. I've seem smaller petals on plants in other location. Link to comment
colinbm Posted April 18, 2021 Share Posted April 18, 2021 Thanks Andrea, so about 15mm diameter. Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now