I had to really search online to discover the part of the plant, that is the fiber for paper or cloth. Then I had to look up how you change the bark into a fiber! Half a cup of washing soda in a huge pot of water. Boil it for 20 min.
There’s the fiber cards in the last photo. You can use it to card the fibers and make roving. Left over crap from when my parents thought they were pioneers. I got the spinning wheel too.