Kashyyyk, also known as Wookiee Planet C, Edean, G5-623, and Wookiee World, was a Mid Rim planet. It was the lush, wroshyr tree-filled home world of the Wookiees.
With no axial tilt and a perfectly circular orbit, Kashyyyk experienced one continuous season. It was composed of a molten metallic core, rocky mantle, and a silicate rock crust. The planet had four continents, making up 40% of the surface, which were mostly covered in lush, wroshyr tree-filled forests, which were several kilometers high. The planet did have a small amount of desert region in the rain-shadow of its small mountain ranges as well as large plains including the Woolwarricca region. A tropical ocean belt contained archipelagos and long coral reefs. In addition, a few sandy beaches could be found along the shores of its oceans. The Kashyyyk coastlines were lined with a brownish-white sand and thick grasses. Kashyyyk's highest peak was Korrokrrayyo Mountain.
Much of the planet could be compared to a giant swamp—filled with wildlife and covered with wet soil and large amounts of water. The prevalent ecology could be politely described as a "layered deathtrap", as the dangers presented by local wildlife increased as one descended toward the forest floor. According to Wookiee culture, this vertical environment consisted of seven levels. The bulk of Wookiee civilization was located on the uppermost seventh level, and even the bravest Wookiees rarely ventured below the fourth level. Unlike most, Chewbacca was known to travel below this marking point for most Wookiees. The ground level was known as the Shadowlands and, sometimes, the "notherworld".
As previously stated, the wroshyr trees were the dominant flora. Wroshyr trees may have actually been one large connected organism, as when limbs of two tree limbs ran into each other, they would fuse together. The Wookiees inferred great symbolism in this.
The forests of Kashyyyk were filled with a tremendous variety of plant life, many with some form of consciousness. The Wookiees learned to communicate with these plants and often came to an understanding about their use. One example of this was with the Orga plants, who allowed the Wookiees to harvest their older roots to use in Life Day ceremonies.
Most other flora was parasitic to the wroshyr trees, grew in dirt pockets in crevices of the trees, or were carnivorous. Chyntuck, however, was a species of onion-like vegetable used by the Wookiees as food.
There were at least two types of large carnivorous plants in the lower levels. These included a carnivorous, spiked vine plants, and the infamous Syren plant, which played a crucial role in the coming of age rituals for various Wookiee tribes. Both of these plants were capable of consuming adolescent Wookiees or fully grown Humans.
Besides the primary sentient Wookiees, Kashyyyk was home to various species of banthas, a small population of terentateks, and a host of other species. Usually, the deeper into the jungle one went, the more dangerous the animals became. For instance, the tenacious and intelligent Kashyyykian giant weaver—a giant red-pigmented spiderlike creature—could track prey for over a kilometer and coordinate with other weavers to organize an ambush. Additionally, many of the species that inhabited the deeper parts of the jungle were capable of bio-phosphorescence, since the deeper layers of the forest were in perpetual darkness.
The cuirrent governing body is the Coven led by the High Priestess and High Witch Council. In accordance to maintain peace with the natives, the Wookiees have been promised defense against poachers in exchange for loyalty. These natives are given still free reign of their own provinces without fear of slaverly and mistreatment. They have maintained positive relations with the Witches.