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''Poa pratensis'', commonly known as Kentucky bluegrass, smooth meadow-grass, or common meadow-grass, is a perennial species of grass native to Europe, Asia, North America, and northern Africa. ''Poa pratensis'' forms a valuable pasture plant, characteristic of well-drained, fertile soil. It is also used for making lawns in parks and gardens and is common in cool moist climates like the northeastern United States. ==Taxonomy== ''Poa pratensis'' was one of the many species described by Carl Linnaeus in his landmark work ''Species Plantarum'' in 1753. ''Poa'' is Greek for fodder and ''pratensis'' is Latin for meadow. The name Kentucky bluegrass derives from its flower heads, which are blue when the plant is allowed to grow to its natural height of two to three feet. ''Poa pratensis'' is the type species of the grass family Poaceae. There are two ill-defined subspecies: *''Poa pratensis'' ssp. ''pratensis'' – temperate regions *''Poa pratensis'' ssp. ''colpodea'' – Arctic 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Poa pratensis」の詳細全文を読む スポンサード リンク
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