I was noticing some irises that have purple edged bloom covering before it opens and took a few pictures this morning. ( I'm not sure what that part of the bloom is called.)
This is Dialect, it's stalks are purple too, but only slight PBF (Much darker then is shows on the pic)
Broadband has both
Quantum Leap has no PBF, but has the edge on the bloom covering.
Splashacata had both really dark. Had trouble getting the camera to focus on the stems so they aren't very clear, but I think you can get the idea.