Massassi trees were colossal trees with purple bark; they thrived on the moon of Yavin 4. These giants created a dense, virtually impenetrable forest of [rain](/article/water] that blanketed the lunar landscape, fostering one of the galaxy's most vibrant and varied sets of living things. Named in honor of the Massassi, the warriors who constructed stone temples on Yavin's moon more than 5000 years prior to the time of the Galactic Empire before their disappearance, the trees provided shelter for a multitude of animal species, notably the woolamanders and stintarils.
The concept of Massassi trees first appeared in Jedi Search, a Star Wars Legends novel penned by Kevin J. Anderson and published in 1994. Their inclusion in official canon was solidified with the publication of the reference guide Ultimate Star Wars in 2015.