Tengun, you are almost right about the use of sassifrass. You are spot on about using the roots for tea. The smaller roots, no bigger than your finger. are best and it is the bark of the root that one should use. Peel it, wash it and steep it in hot pure water such as well water. Treated city water will result in a very bitter brew. I think it has to do with the chlorine in the water reacting with something in the sassifrass that gives such a bitter taste.
Now, as for the file' for gumbo, it is not made from the root, it is made from the dried leaves. My wife's family comes from Louisiana and her uncle used to make his own file' by harvesting the leaves from the sassifrass trees, drying them and then grinding them into a powder in a device that looked like a big morter and pestle. His home made file' was better than any file' that you could get from a store. :hatsoff: