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 (– in) broad, smooth or slightly roughened, with a rounded to truncate ligule 1–2 millimetres (– 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 (– 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).
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