I find the surface structures amazing, UV shots can reveal...
(both shots from testing a new fast lens designed for UV-A 300-400nm)
[click on image to see a larger one]
Phalaenopsis Orchid UV:
Here a VIS image:
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