The Bluegrass (grass) reference article from the English Wikipedia on 24-Jul-2004
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Bluegrass (grass)

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Bluegrass
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Poales
Family: Poaceae
Genus: Poa
Species
Bluegrass refers to a genus of grasseses, some of which look bluish when in flower. The term often refers to a particular species, Kentucky bluegrass, Poa pratensis, that is commonly grown in central Kentucky and in lawns throughout the eastern United States.