The stalk is a branch-like growth that grows out of the yukkuri's head, just above the forehead. It is used in the most common form of Yukkuri reproduction- stalk-type pregnancy. The baby yukkuris grow on the stalk like fruits until they are mature enough to be born, at which point they drop like fruits and are able to live as normal yukkuris. The stalk is then usually fed to the baby yukkuris. Exactly why this is hasn't yet been explored in great detail, but it could be that the stalk contains vital nutrients and passes on vague information and memories.