Vanilla base

''Phragmites'', the Common reed, is a large perennial grass found in wetlands throughout temperate and tropical regions of the world. ''Phragmites australis'' is sometimes regarded as the sole species of the genus ''Phragmites'', though some botanists divide ''Phragmites australis'' into three or four species. In particular the South Asian Khagra Reed – ''Phragmites karka'' – is often treated as a distinct species.