Jump to content
UltravioletPhotography

Cymbalaria muralis (Ivy-Leaved Toadflax)


Recommended Posts

Jim Lloyd

Ha - Just bought a flower identification app - and so far its auto identification has worked (n=2!)

 

This plant grows like a weed literally right outside our door (and at times even attempts to encroach inside!) [Hexham, North East England, May]- I have been know to rip it up like a weed - maybe I will start to think differently now ?

 

Images similar to those on this site already (here, here and here ) but I was taken particularly in my examples by the gold and silver appearance of the leaves in UV

 

D3200 full spectrum conversion

UG1 2 mm + BG40 2 mm for UV

BG40 only for visible

Photax 35mm f/3.5 old preset version with extension tube

f/16. Full Sunlight outside early afternoon

WB and processing in Lightroom

ASA 400 4seconds for UV / ASA 100 1/50 s for visible

 

post-175-0-92927600-1525443230.jpg

 

post-175-0-86346400-1525443245.jpg

 

post-175-0-27889300-1525443263.jpg

 

post-175-0-84099800-1525443327.jpg

Link to comment
Andrea B.

I moved it to the Ultraviolet Photographs section.

 

Yes, some foliage can have a metallic look in UV due to a strong iridescence. That can happen for various reasons - cellular surface characteristics or leaf coatings like a waxy cuticle or other reasons.

 

I love seeing this little flower growing on brick walls or on garden stones. I saw C. muralis growing on some old bridges in Venice where it was very charming in that rustic setting. It seems to be very hardy stuff.

Link to comment
Andy Perrin
Yes, some foliage can have a metallic look in UV due to a strong iridescence. That can happen for various reasons - cellular surface characteristics or leaf coatings like a waxy cuticle or other reasons.

 

The reason UV is particularly prone to it is that refractive indexes of most things are much higher in UV than in visible. The percent of light reflected (at normal incidence, for a given wavelength) is R = ((n-1)/(n+1))^2, where n is refractive index at that wavelength, so a bigger n means a bigger percentage of the light is reflected.

Link to comment

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
×
×
  • Create New...