Shrubs

Shrubs are blocks that were added in Beta 1.6. The living variant appears in large amounts in the forest biomes. Shrubs are not a solid block, but rather an aesthetic weed that does not block movements, like Sugar Cane, Wheat and Tall Grass; just occurring naturally.

Living shrubs have a small chance to drop Seeds (Item) when broken, which replaces using the hoe on grassy dirt blocks in versions prior to 1.6 Beta. They behave similarly to normal Saplings, but when you try to use Bone Meal on it nothing will happen.

Dead Shrubs
Dead Shrubs spawn on Sand blocks in desert biomes.