Contents 1 Taxonomy 2 Description 3 Ecology 4 Cultivation and production 5 Hybridization with Poa arachnifera 6 See also 7 References 7.1 Notes 8 Further reading

Taxonomy[edit] 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 derived from pratum, the 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 60 to 90 cm (2 to 3 feet).[3] 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

Description[edit] Poa pratensis is a herbaceous perennial plant 30–70 centimetres (12–28 in) tall. The leaves have boat-shaped tips, narrowly linear, up to 20 centimetres (8 in) long and 3–5 millimetres (0.12–0.20 in) broad, smooth or slightly roughened, with a rounded to truncate ligule 1–2 millimetres (0.039–0.079 in) long. The conical panicle is 5–20 centimetres (2–8 in) long, with 3 to 5 branches in the basal whorls; the oval spikelets are 3–6 millimetres (0.12–0.24 in) long with 2 to 5 florets, and are purplish-green or grey. They are in flower from May to July, compared to annual meadowgrass (Poa annua) which is in flower for eight months of the year. Poa pratensis has a fairly prominent mid-vein (center of the blade). The ligule is extremely short and square ended, making a contrast with annual meadowgrass (Poa annua) and rough meadowgrass (Poa trivialis) in which it is silvery and pointed. The Kentucky bluegrass is a dark green/blue compared to the apple-green color of Poa annua and Poa trivialis. The rootstock is creeping, with runners (rhizomes). The broad, blunt leaves tend to spread at the base, forming close mats.

Ecology[edit] Myrmus miriformis in the Olomouc Region This species is among the food plants of the caterpillars of the meadow brown (Maniola jurtina) and gatekeeper (Pyronia tithonus) butterflies; the common sun beetle (Amara aenea) (adults feed on the developing seeds), Eupelix cuspidata of the leafhopper family, and Myrmus miriformis, a grassbug (feeds on young blades and developing seeds).[4]

Cultivation and production[edit] Since the 1950s and early 1960s, 90% of Kentucky bluegrass seed in the United States has been produced on specialist farms in Idaho, Oregon and Washington.

Hybridization with Poa arachnifera[edit] During the 1990s botanists began experimenting with hybrids of Poa pratensis and Texas bluegrass (P. arachnifera), with the goal of creating a drought and heat-resistant lawn grass.

See also[edit] Gardening portal Sod

References[edit] Notes[edit] ^ ^ p. 5 ^ Published: June 03, 1993 (1993-06-03). "What Makes Kentucky's Bluegrass Blue – New York Times – June 3, 1993". Retrieved 2012-12-23.  ^ Natural England description on website

Further reading[edit] Flora Europaea: Poa pratensis Wikimedia Commons has media related to Poa pratensis. European Poa Database Horticultural information on this turfgrass; growing it in the home garden The Observers Book of Grasses, Sedges and Rushes. Frances Rose. pages 42–43 Kew gardens grass database Retrieved from "" Categories: PoaLawn grassesGrasses of AfricaGrasses of AsiaGrasses of EuropeGrasses of North AmericaGrasses of CanadaGrasses of the United StatesCosmopolitan speciesPlants described in 1753Taxa named by Carl LinnaeusHidden categories: Articles with 'species' microformats

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Bluegrass RegionBluegrass MusicTaxonomy (biology)PlantaeAngiospermsMonocotsCommelinidsPoalesPoaceaeMeadow-grassBinomial NomenclatureCarl LinnaeusPerennialPoaceaeLawnCarl LinnaeusSpecies PlantarumAncient Greek LanguageFodderLatinMeadowType (botany)PoaceaeSsp.HerbaceousLeafPanicleSpikeletFloretPoa AnnuaLigulePoa AnnuaPoa TrivialisRootstockRhizomeEnlargeOlomouc RegionMeadow BrownGatekeeper (butterfly)Amara AeneaLeafhopperIdahoOregonWashington (state)Poa ArachniferaDroughtPortal:GardeningSodHelp:CategoryCategory:PoaCategory:Lawn GrassesCategory:Grasses Of AfricaCategory:Grasses Of AsiaCategory:Grasses Of EuropeCategory:Grasses Of North AmericaCategory:Grasses Of CanadaCategory:Grasses Of The United StatesCategory:Cosmopolitan SpeciesCategory:Plants Described In 1753Category:Taxa Named By Carl LinnaeusCategory:Articles With 'species' MicroformatsDiscussion About Edits From This IP Address [n]A List Of Edits Made From This IP Address [y]View The Content Page [c]Discussion About The Content Page [t]Edit This Page [e]Visit The Main Page [z]Guides To Browsing WikipediaFeatured Content – The Best Of WikipediaFind Background Information On Current EventsLoad A Random Article [x]Guidance On How To Use And Edit WikipediaFind Out About WikipediaAbout The Project, What You Can Do, Where To Find ThingsA List Of Recent Changes In The Wiki [r]List Of All English Wikipedia Pages Containing Links To This Page [j]Recent Changes In Pages Linked From This Page [k]Upload Files [u]A List Of All Special Pages [q]Wikipedia:AboutWikipedia:General Disclaimer

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