I still don't know what this is, if an Iris or a lily or what. All I know is that it takes years for it to bloom, and once it blooms, it does so once a year, one per plant. I went about 20 years or so to the center of the island, to Orocovis, and we went up to the mountain, to a property that my father-in-law had. His wife gave me a little plant. I never knew what it would look like, but I'm glad i accepted it.
I don't know why the other plants are not flowering, though. I think I'll transfer those to the front of the house, just to see what happens.