How do the tree-ships work?
The royal trees are sentient beings. As such, they choose whom they will partner with (and there is a ceremony for this). Once a tree is partnered, a ship is then constructed which can access the tree’s power. The tree is placed into a core-container and container is inserted into the newly constructed ship. The tree creates a subspace region and designs the environment to suit the tastes of the partner (the living quarters). Thus far, these have all resembled a planet’s surface (most likely Jurai’s). Those seen have had a single, giant tree (20 or more stories high) at the subspace region’s center, but this may not be true for all tree-ship’s living quarters. To enable better synchronization the connection between the partner and the tree, a key is made from a branch of the tree. So each tree has a key which is kept by the partner. The shape of the key is dependant on the branch used and the taste of the partner. 1st-generation tree’s keys are “master keys” which can take control over