Poa annua.jpg
Annual meadow-grass (Poa annua)
Scientific classification e
  • Panicularia Heist. ex Fabr.
  • Poagris Raf.
  • Paneion Lunell
  • Anthochloa Nees & Meyen
  • Dasypoa Pilg.
  • Libyella Pamp.
  • Bellardiochloa Chiov.
  • Arctopoa (Griseb.) Prob.
  • Parodiochloa C.E.Hubb.
  • Tovarochloa T.D.Macfarl. & But
  • Tzvelevia E.B.Alexeev
  • Ochlopoa (Asch. & Graebn.) H.Scholz
  • Nicoraepoa Soreng & L.J.Gillespie
"Bluegrass": The seed pods go from green to purplish blue to brown. During the purplish blue phase the seed stems have a navy-blue coating.
Rough meadow-grass (Poa trivialis), showing the ligule structure

Poa[2] is a genus of about 500 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 Pooideae subfamily of the Poaceae family.[3][4][5][6]

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).[7][8][9]

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.[10][11][12]

Cultivation and uses

Many of the species are important pasture plants, used extensively by grazing livestock. Kentucky bluegrass (Poa pratensis) is the most extensively used cool-season grass used in lawns, sports fields, and golf courses in the United States.[13] Annual bluegrass (Poa annua) can sometimes be considered a weed.[14]

According to second-century physician Galen, the roots of certain species are good for treating fresh wounds and bleeding. In the sixteenth century, Poa grasses were used to treat inflammation of the kidney.[15]

Some of the Poa species are popular for gardens and for landscaping in New Zealand.

Other Languages
العربية: قبأ
asturianu: Poa
беларуская: Метлюжок
català: Poa
Cebuano: Poa
dansk: Rapgræs
Deutsch: Rispengräser
Diné bizaad: Tsinyaa tłʼoh
eesti: Nurmikas
Ελληνικά: Πόα
español: Poa
Esperanto: Poo
فارسی: چمن (سرده)
français: Poa (plante)
հայերեն: Դաշտավլուկ
hornjoserbsce: Lipnica
hrvatski: Vlasnjača
Bahasa Indonesia: Poa
íslenska: Sveifgrös
italiano: Poa (botanica)
ქართული: თივაქასრა
қазақша: Қоңырбас
lietuvių: Miglė
македонски: Ливадарка
Nederlands: Beemdgras
norsk: Rapp
oʻzbekcha/ўзбекча: Qoʻngʻirbosh
polski: Wiechlina
português: Poa
русский: Мятлик
suomi: Nurmikat
svenska: Gröen
українська: Тонконіг
vepsän kel’: Nor'mik
Winaray: Poa
中文: 早熟禾属