No it's not iridaceae ! Well, that's a good word I wouldn't use very often. I certainly did not learn that at school - unless it was one of the Latin words we had to memorize and I've since forgotten!Not at all, glimarg, I am not the only member playing this game! I can only speak for myself. But so far as I am concerned I'll offer my last reply which is that I believe that they ALL belong to the IRIDACEAE family.
Unfortunately, we all come from different backgrounds and have different experiences. Sorry!