The Stratum that is just below the Emerald Grove. The second Stratum of the Yggdrasil Labyrinth, the Primitive Jungle has a different atmosphere. True to its name, there are wild plants and animals everywhere, and the vibe gives the sense of one truly being in a jungle.
*Alraune is an optional boss that can only be found when the quest "Phantom of the Forest" is accepted. She is located in the eastern half of B7F, which is ultimately accessible through a Violet Crystal door on B11F.
**One does not have to battle the Wyvern. It is actually very discouraged until much later into the game.
***The Great Dragon replaces the Wyvern at B8F after its associated quest, "The dread Wyrm", is accepted. Defeating it will raise the level cap by 10. Once the Great Dragon has appeared, the Wyvern will respawn in B9F.