We got a tip they were just starting to bloom. Jim found the first one and called me over.
Finally, we stumbled upon this beauty. It was fully open and a brilliant Pepsi-can blue. A blue you rarely see in nature. Here is a side view.
And here is a top view. You can see the fringes on the petals, where it gets its name. A flower that was well worth the two hours of searching for the fen.