Definitely no PBF in my 'Kupari', not even a trace of purple anywhere on
the plants at any season. I do have a "blue" pallida that, very like
'Dalmatica', that shows the faintest trace of purple on the edge of the base of
the leaf at bloom time, but you practically need a magnifying glass to find
it. It really surprised me when I noticed it, as the plant is very typical
I. pallida. Even so, I'm not sure if it qualifies as true PBF.
I also have a few I. pallida that show a hint of purple on the young
spathes (right before they go papery), but I don't remember which ones.
Seems maybe all the (three) cengialtii clones do, but I'm not certain.
I see the PBF on Tom's pod-loaded hybrid too. Otherwise I thought the
plant looks a lot like I. pallida. I can't remember what 'Rosemary's
Dream' looks like, and now I'm curious.