elephant grass 
noun [mass noun]
A tall robust tropical African grass which is used for fodder and paper.
- Pennisetum purpureum, family Gramineae.
- The exhibition includes a South African ficus, a tamarind with pods, elephant grass from Africa, cherry, bougainvillaea, fig, Accacia and trees collected from forests.
- The grave sites may be overgrown with tall, dry elephant grass, which is burned away, creating an Armageddon-like atmosphere.