Minecraft wiki entry for Lush_Caves, associated text: Underground, moss and ores covers the floors and ceilings, along with moss carpets, grass and azalea bushes on the floors. On the ceiling, vines and cave vines with glow berries grow down and light up the caves, and spore blossoms grow from the ceiling and drip water particles. A lush cave contains springs and shallow lakes with clay where dripleaf plants grow out of them. Sometimes these lakes generate dry.