[click on image to see a larger one]
Visible light image:

UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):

UV image using Jupiter-U filter (approx. 280-385nm, effective peak approx. 365nm):

Simulated butterfly vision (UV - VIS) using XBV3 filter:

Simulated bee vision (UV - VIS) using XBV6 filter:

Quadriptych of the above:

Mexican Zinnia flowers have a very specific UV pattern, its petals are very UV dark on the middle and bottom, but its petal tips are very UV bright, reaching much deeper into UV as any other flower I know (<345nm), and all this gets nicely visible.
I have written previously about these flowers HERE.
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