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Poa Compressa – a species of perennial flattened meadow grass

Images of Poa Compressa at

Poa Compressa is a species of perennial flattened meadow grass.

Overview of Poa Compressa

• It has common names:
– Canada bluegrass
– Flattened meadow grass
• It is similar to Common Meadow-grass.
• It is native to Europe.
• It is found almost worldwide as an introduced species.

It grows in:
– old wall tops
– pavement cracks
– dry stony grassland
– many types of wild habitat
• It has a flattened stem.
• The stem can grow up to 23–30 cm tall.
• It has one sided panicle.
• It is of grey green color.
• It has purple florets.
• The ligule is rounded.
• It is a rhizomatous grass.
• It has Culms that are 15-20 cm tall.
• The culms are hollow and flattened.
• Sheaths are open and glaberous.
• The leaves are about 1-4 mm wide and 2-10 cm long.
• The inflorescence is a narrow panicle.
• This is about 3-8 cm long.
• Spikelets are 3to 8 flowered.

Uses of Poa Compressa

• It is used for controlling erosion on disturbed sites. They are such as:
– Roadsides
– Mine reclamation sites
– Heavy use recreation areas
• They are used for low maintenance landscaping.
• It is palatable to livestock and big game.

Lepidoptera whose caterpillars use Poa as its food include:
• Agriphila inquinatella
• Cercyonis pegala
• Poanes hobomok
• Poanes zabulon

Scientific Classification of Poa Compressa

• Kingdom : Plantae
• (unranked) : Angiosperms
• (unranked) : Monocots
• (unranked) : Commelinids
• Order : Poales
• Family : Poaceae
• Genus : Poa
• Species : P. compressa
• Binomial name : Poa compressa

Growing/Caring conditions

• This is an incredibly easily grown plant.
• It succeeds in well-drained soils.
• It prefers moderately fertile soil.
• It grows well in a sunny position.
• It can tolerate very acid soils.
• This plant is a very common garden weed.
• It usually does not require cultivation.
• This is an essential food plant for the caterpillars of numerous species of butterfly.
• It is seen growing in close cut lawns.
• The seed drops very readily in the plant and hence is difficult to harvest.
• But this way the seed is spread effortlessly.
• It makes the flower even more difficult to eradicate.
• A lot of the species are very important pasture plants.
• They are used extensively by grazing livestock.
• Many of the Poa species are popular for gardens as well as for landscaping in New Zealand.

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