Speaking of PBF irises... (Sorry, no pics of the foliage...)
I was back out by my iris bed today (the one with more than 2-3 irises in it), and while I was placing labels, I checked the foliage on 'Golden Immortal' (which of all the irises in that bed, is the only that was listed in the database here as having PBF). Guess what... no PBF! So either mine is not the correct cultivar (it did bloom this spring, and the bloom was a golden yellow (the pic looked the AIS images)), or else this is another one of the irises that sometimes show PBF, or the database here is wrong. (PBF was not listed in the AIS encyclopedia. Curiously enough, a quarter inch center line WAS mentioned, but I have not seen it on any image of this cultivar, including the one on the Sutton website.)