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Thread: UV Fluorescence in CPs

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    nimbulan's Avatar
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    UV Fluorescence in CPs

    I thought I'd start a thread for pictures and discussion of UV fluorescence in CPs. I get the impression that it's not a very well-known phenomenon, and I'd like to change that!

    I'll start with a fantastic picture of N. "Triffid" I took last night:



    And one of my random hybrid from April (possibly identified as N. ventricosa x angasanensis.) The pitchers are old and dying back, but they had lots of super thick nectar on them to fluoresce.

    Last edited by nimbulan; 06-07-2016 at 10:45 AM.

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    Holy crap--that's awesome! Do a Drosera!! I have always been curious about those!! I've seen plenty of UV Nep photos, but yours make it blatantly obvious that these plants are advertising with multiple wavelengths.

    Thanks for sharing!
    Last edited by theplantman; 06-07-2016 at 11:04 AM.

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    nimbulan's Avatar
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    I don't think it's necessarily multiple wavelengths being emitted - rather it's the blue color of the fluorescence blending with the red peristome, and also being visibly concentrated in certain areas due to light refraction. I'll have to examine some other plants with my UV flashlight to see what else I can find - I know at the very least that Sarracenia purpurea exhibits some level of UV fluorescence.

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    Hello, I must be going... Not a Number's Avatar
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    I posted links to photos of UV fluorescence in Sphagnum moss. Check out the UV Photography forum for all kinds of good stuff.
    Grand Hotel... always the same. People come, people go. Nothing ever happens.

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    To get any meaningful information the receptive device (camera) needs to be U/V sensitive as with insects' ocular vision. Otherwise it's like shining a U/V torch on vaseline glass. The plants are not advertising to human eyes, we just kidnap them and keep them hostage.
    Fred

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    nimbulan's Avatar
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    Quote Originally Posted by fredg View Post
    To get any meaningful information the receptive device (camera) needs to be U/V sensitive as with insects' ocular vision. Otherwise it's like shining a U/V torch on vaseline glass. The plants are not advertising to human eyes, we just kidnap them and keep them hostage.
    Just because the plants aren't advertising to us doesn't mean we can't appreciate what they do show us. In any case cameras are UV-sensitive, at least partially. I'm actually curious now how different the picture would look if I took it again through a UV filter. Now you've got me looking at lenses designed to filter all non-UV light out...
    Last edited by nimbulan; 06-07-2016 at 11:35 AM.

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    fredg's Avatar
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    Yaaaay! I made you think. Mission accomplished
    Fred

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    nimbulan's Avatar
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    Time for a picture dump since I brought my UV flashlight out again last night.

    Cephalotus follicularis by Nimbulan, on Flickr

    Sarracenia rosea (UV illuminated) by Nimbulan, on Flickr

    Sarracenia purpurea ssp. venosa, Tattnall Co, GA (UV illuminated) by Nimbulan, on Flickr
    Very weak fluorescence here. I may need to try this picture again with a visible light filter.

    Nepenthes 'Miranda' (UV illuminated) by Nimbulan, on Flickr

    Nepenthes x hookeriana (UV illuminated) by Nimbulan, on Flickr
    Interestingly, the upper part of the pitcher is slightly darker under UV when it's the same color under normal lighting.

    Nepenthes adnata (UV illuminated) by Nimbulan, on Flickr

    Nepenthes singalana pot (UV illuminated) by Nimbulan, on Flickr
    It seems like just about everything that grows in CP pots glows!

    Nepenthes "Triffid" (UV illuminated) by Nimbulan, on Flickr

    Nepenthes heterodoxa (UV illuminated) by Nimbulan, on Flickr
    Heliamphora pitcher hairs glow brightly when the pitcher first opens, but fade quickly for some reason.

    Drosera "Marston Dragon" pot (UV illuminated) by Nimbulan, on Flickr

    Drosophyllum lusitanicum seeds (UV illuminated) by Nimbulan, on Flickr
    Apparently Drosophyllum seeds glow. I guess I know how to find them in the dark now.

    Nepenthes attenboroughii (UV illuminated) by Nimbulan, on Flickr
    Unlike other species I grow, the leaves seem to be reacting to the UV rather than just the pitchers.

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