Dead Bush

Dead Shrubs is a new block in 1.6. It spawns on Sand blocks in the desert biome. Dead shrubs are not a solid block, but rather an aesthetic weed that does not block movements, like Sugar Cane, Wheat and Tall Grass; just occuring naturally.

Dead shrubs currently have no use, and cannot be replanted. They behave similary like normal Saplings.

Screenshot
http://i.imgur.com/b0Kno.png another pic