Phragmites is a genus of four species of large perennial reed grasses found in wetlands throughout temperate and tropical regions of the world.
The World Checklist of Selected Plant Families, maintained by Kew Garden in London, accepts the following four species:
Phragmites australis (Cav.) Trin. ex Steud. – cosmopolitan
Phragmites japonicus Steud. – Japan, Korea, Ryukyu Islands, Russian Far East
Phragmites karka (Retz.) Trin. ex Steud. – tropical Africa, southern Asia, Australia, some Pacific Islands ...