This is a spiny roadside weed in the tropical regions of the world. When touched, the leaves fold. This movement is due to a change in internal water pressure in the swollen pulvini cells at the base of the leaflets. Go Back Bamboo, Phyllostachys niger or Bambusa glaucescens . Some bamboo species are useful for construction, and some for food.
Bamboos have much to offer as ornamental specimens.
There are around 200 species of bamboo.