|Of all the giant tropical bamboos grown in the United States, this is the most common. It grows in tight clumps, is very straight and has wide leaves that grow on fairly short branches. This bamboo grows vigorously. Clump bamboos have underground stems that sprout vertical shoots much closer to their parent plants, usually growing slowly outward. Clumpers tend to be tropical or subtropical. Bamboo has many uses worldwide from building materials to paper.