I've been experimenting with some different natural fibers after making some dogsbane cordage with James. Here are a few I have held onto. The left is green processed yucca fibers, the center is a paiute deadfall trigger from dogsbane with a cedar tab, and the right is a piece of milkweed I made from the fibers that all came from one stalk. The milkweed is probably about 5 feet long at this point and I've since added some more to that piece. The milkweed was dried, then broken open, I removed the pith, and then soaked it to scrap the stalk skin away from the fibers. It almost looks like raw linen fiber when it first dries. The yucca is awesome because the fibers are all tapered and easily separated from the green material in the leaf. If you took your time you could make some really consistent thin diameter cordage with those. I've also used dried yucca and poplar bark for quick stuff.