Wife says what we have around farmsteads is a Bearded Iris. But she also says she knows where to get the other kind. The Blue Flag Iris appears to be a more open flower than the Iris that was popular plantings around farmsteads.
https://www.google.com/search?ie=UTF-8&a...;q=Bearded+irisReading up on the Bearded Iris, it says excellent drainage is a must, so they would not likely be suitable for wet pond edge conditions.