About Poa compressa L.
Poa compressa, commonly called Canada bluegrass or flattened meadow-grass, is a perennial flattened meadow grass species. It is similar to common meadow-grass, Poa pratensis. This species is native to Europe, but now occurs nearly worldwide as an introduced species. It grows on old wall tops, in pavement cracks, dry stony grassland, and many types of wild habitat. Its flattened stem reaches 23–30 cm in height. It bears a compact, one-sided grey-green panicle that holds purple florets, and its ligule is rounded.