Elaine, ok thank you! That's great info! Now I get the misting.....
When I picked up the bifurcatum a couple of months ago, it was in a plastic hanging pot at a big box store, and was SO heavy from having been watered, I had to re-pot right away. Even then, a few weeks later some black marks showed up on the leaves, a fungus from having been kept wet for whatever amount of time. Cut off the three affected fronds at that point and it's fine now.
I wish I lived in an area where they could grow on trees! That sounds like a fun back yard!!!