Poa trivialis (rough bluegrass; UK: rough-stalked meadow-grass[1] or rough meadow-grass[2]), is a perennial plant regarded in the US as an ornamental plant.

It is an invasive species in the Great Lakes region and was first sighted in 1843.

It has shiny leaves like Lolium perenne and crested dog's-tail.

Compare to annual meadow grass Poa annua which is silvery and pointed, and common meadow grass Poa pratensis which is short and blunt.

[5] The food plant of the caterpillars of small heath (Coenonympha pamphilus), meadow brown (Maniola jurtina), gatekeeper (Pyronia tithonus) butterflies; 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.