What do you call the plant fibers of the Bamboo stem? It looks like wood but it is not wood, it is in the Grass family but it is not grass. bamboo fibers can have the appearance of plastic but they are biodegradable and natural. It makes me wonder what could be done with all the other plants that have a rigid stem that isn't quite wood. Perhaps rose bushes have stems that can be used as plastic and wood like materials? Who knows?