Tropical rainforest
The understory is usually a dark, humid place, under the canopy. There is very little light and no breeze because they are blocked out by the canopy. The plants under the canopy must be able to live with very little sunlight. Bushes, large green plants, ferns and small trees make up this layer. Often they will only grow in open patches where a big tree has fallen down. Other plants, like vines, grow on the big trees.