Minecraft wiki entry for Dark_Forest, associated text: Dark forests feature a much higher density in trees compared to other forest biomes, which often times block direct views of the sky entirely. Oak, dark oak, and sometimes birch trees generate in these biomes; the only place where dark oak trees naturally generate. Additionally, both types of huge mushrooms generate among the trees, though the red variants are more common. Like normal forests, lily of the valley, rose bushes, peonies and lilacs generate in this biome family along with the usual dandelions and poppies. Grass takes on a dark but vibrant green color.