Scirpodendron ghaeri

Scirpodendron ghaeri is a plant in the family Cyperaceae native to areas from India through southeast Asia to the western Pacific. It is a tall sedge with a woody rhizome producing 3 m (9.8 ft) long leaves in dense clumps; the leaves have sharp edges and the plant forms impenetrable barriers. It was first described as Chionanthus ghaeri by Joseph Gaertner in 1788, and transferred to the genus Scirpodendron by Elmer Drew Merrill in 1914. It usually grows in coastal swamp forest, but may be found in rainforest and gallery forest...read more on Wikipedia.