Annual beard-grass (Polypogon monspeliensis) belongs to the Poaceae (the Grass family). It is an annual herb that is native to southern Europe, Asia and northern Africa, and has been introduced to North and South America, some countries in Africa, Australia and New Zealand. This herb grows in coastal marshes, river estuaries, marshes, along stream edges, and humid habitats. The culms are erect or geniculate, clumping, and up to a height of 30-60 cm. The leaves are narrowly to broadly linear, 8-15 cm long. The pale green, narrowly oblong panicles are borne from May to June. The spikelets have long, thin, whitish awns, which give the inflorescence its texture.