The colossal wroshyr trees were native to the Wookie homeworld of Kashyyyk. These trees were literally the cradle of Wookiee civilization, supporting large cities kilometers above the planet's forest floor.
The massive trees dominated the landscape, with over 1,000 different varieties, that had adapted to everywhere except for the planet's poles. The trees could live up to 50,000 years, reaching kilometers in height. The trees were so big that entire communities could live within their hollowed-out trunks, which, like caves, provided both shelter from the elements and protection against the planet's many predators. In coastal environments, the wroshyrs did not grow as thickly together.