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bluegrass,any species of the large and widely distributed genus Poa, chiefly range and pasture grasses of economic importance in temperate and cool regions. In general, bluegrasses are perennial with fine-leaved foliage that is bluish green in some species. One of the best known and most important is the sod-forming Kentucky bluegrass, or June grass (P. pratensis), believed to have been introduced from the Old World and now widely naturalized in the United States; Kentucky is known as the Bluegrass State because this species is so prevalent there. Others are rough bluegrass (P. trivialis), used for shady lawns; Sandberg bluegrass (P. secunda), the most common native species; and big bluegrass (P. ampla), an important range grass. Bluegrass is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
..... Click the link for more information. , class Liliopsida, order Cyperales, family Poaceae.
The common name for several species of perennial pasture and lawn grasses in the genus Poa of the order Cyperales.