Minecraft wiki entry for The_Nether, associated text: The majority of flora in the Nether is fungus-based as opposed to plants. The Nether "grass" consists of specialized Nether mycelium (known as "nylium"). The Nether features its own unique fungi (including nether wart), as well as equivalent huge fungi which serve as trees. The stems of the huge fungi function as logs. Also present are a number of native vines and roots.