Sorry for the nastiness in the 2nd picture
Found what I think might be this as an ornamental plant growing around here. Cut off a dying leaf. It was very hard if not impossible to tear off. Seems like it has strong fibers.
Just split the leaf lengthwise a bunch of times. Don't actually know how to process it.
It did not always split evenly... even if splitting from the thin end.
I mean to try it as a bowstring, but maybe this should be moved to primitive skills?