Just preparing and testing for a field trip, so some output here for your - hopefully - viewing pleasure...
UV camera, Baader-U filter, my ReflectionDisc for in-camera whitebalancind, leading to the following UV "color" palette:
[click on image to see a larger one]
The 375-390nm group (violet UV reflection):
The 350-370nm group (yellow UV reflection):
That last shot, a Helianthus tuberosus (in female state) image is quite interesting, as the full blooming flower shows a 350-370nm reflection, whereas the younger buds show some in the 375-390nm range. Obviously there are development stages in UV reflections, I would assume .
[excuse the little motion blur in some images, it was quite windy today...]
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos