Poa

Poa
	Poa annua (annual meadow-grass)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Supertribe:	Poodae
Tribe:	Poeae
Subtribe:	Poinae; Dumort.
Genus:	Poa; L. (1753)
Synonyms
	Synonymy Anthochloa Nees & Meyen (1835) ; Aphanelytrum Hack. (1902) ; Austrofestuca (Tzvelev) E.B.Alexeev (1976) ; Dasypoa Pilg. (1898) ; Dissanthelium Trin. (1836) ; Eremopoa Roshev. (1934) ; Graminastrum E.H.L.Krause (1914) ; Libyella Pamp. (1925) ; Lindbergella Bor (1969) ; Lindbergia Bor (1968), nom. illeg. ; Neuropoa Clayton (1985) ; Ochlopoa (Asch. & Graebn.) H.Scholz (2003) ; Paneion Lunell (1915), nom. superfl. ; Panicularia Heist. ex Fabr. (1759), nom. superfl. ; Parodiochloa C.E.Hubb. (1981) ; Phalaridium Nees & Meyen (1841) ; Poagris Raf. (1837), nom. superfl. ; Stenochloa Nutt. (1848) ; Tovarochloa T.D.Macfarl. & But (1982) ; Tzvelevia E.B.Alexeev (1985) ;

Poa is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), and speargrass. Poa (πόα) is Greek for 'fodder'. Poa are members of the subfamily Pooideae of the family Poaceae.

Bluegrass, which has green leaves, derives its name from the seed heads, which are blue when the plant is allowed to grow to its natural height of two to three feet (0.6 to 0.9 meters).

The genus Poa includes both annual and perennial species. Most are monoecious, but a few are dioecious (separate male and female plants). The leaves are narrow, folded or flat, sometimes bristled, and with the basal sheath flattened or sometimes thickened, with a blunt or hooded apex and membranaceous ligule.

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