Gnarltree wattle, a building material, was crafted utilizing the gnarltrees native to the planet Dagobah. During his period of self-imposed isolation on Dagobah, Jedi Grand Master Yoda utilized gnarltree wattle, along with stones, to erect his hut within the swamps of the planet.
The initial appearance of gnarltree wattle was in the 1980 original trilogy movie, Star Wars: Episode V The Empire Strikes Back.