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UltravioletPhotography

Dotted loosestrife (Vis, UV, IRG, UVIVF, UVIIF, SWIR 1500-1600nm)


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Andy Perrin

I believe this flower is yellow [dotted] loosestrife. Title will be amended if I'm wrong. :)

 

Camera (except for SWIR) was Sony A7S converted, lens was EL-Nikkor 80mm/5.6. For SWIR, the Wollensack 25mm/1.4 lens was used.

 

Visible

650-405nm using BG38 2mm and DB850 dual bandpass filter

post-94-0-24581500-1564349075.jpg

 

post-94-0-76167900-1564349092.jpg

 

UV

This is under Convoy S2+ 365nm. Filters were S8612 1.75mm and UG11 2mm.

Saturation drastically boosted.

post-94-0-35343600-1564349113.jpg

 

This is in sunshine.

post-94-0-49565600-1564349148.jpg

 

IRG

With Tiffen #12 and DB850 dual bandpass filters.

post-94-0-52048900-1564349290.jpg

 

UVIVF

BG38 2mm and DB850 dual bandpass filters on the camera, and a filtered Convoy S2+. White balance chosen to roughly match the flower color as it looked to me.

post-94-0-63090300-1564349363.jpg

 

UVIIF

Hoya R72 on the camera, filtered Convoy S2+

post-94-0-16205800-1564349455.jpg

 

SWIR 1500-1600

TriWave camera, 1500-1600nm Thorlabs bandpass filter

post-94-0-31447300-1564349479.jpg

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The IRG is so striking! An excellent series, thanks for posting.

 

Yes, this is a Yellow Loostrife, genus Lysimachia. Of the 14 Lysimachia species in New England, color and structural characteristics narrow it down to 4 possibilities of which I think Lysimachia punctata is a likely possibility.

 

 

Here is a link to Birna's Norwegian version: Lysimachia punctata [Dotted Loosestrife]

Interesting side note: L. punctata is blacklisted in Norway as an invasive pest. Here in New England it is not. At least so far.

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Andy Perrin
It’s the first time I’ve seen it here, being grown as a bush adjoining the street. I don’t think it’s invasive in our climate? Based on N=1 samples.
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You wouldn't by chance have a photo of the entire plant? There is this feeling we *might* be dealing with a different species. The genus is correct, however.
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Andy Perrin

Ok, try these.

 

Same plant, standing at different distances. Moving from farther to closer.

 

post-94-0-92887400-1564437234.jpg

 

post-94-0-33462100-1564437261.jpg

 

post-94-0-92107600-1564437269.jpg

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Must be L. punctata, but nowhere near the vigour of growth and flowering we are accustomed to over here.
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Andy Perrin
Probably why it's not considered "invasive" down here. Maybe we are at the edge of its favored climate?
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The petal edges are ciliate with little stalked glands. There are *no* staminodes. Filaments are connate near the base. The corolla is 5-merous. Petals not dotted or streaked with black or red. Stems are slightly fuzzy. Calyx lobes have no red/brown margins. Can't be anything else in New England but L. punctata. :lol:

 

Here you see this flower mostly in gardens. There are, of course, some escapes.

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