''Cortaderia selloana'', commonly known as pampas grass, is a flowering plant native to southern South America, including the pampas after which it is named.
It is a tall grass, growing in dense tussocks that can reach a height of 3 m . The leaves are long and slender, 1–2 m long and 1 cm broad, with very sharp edges. The leaves are usually bluish-green, but can be silvery grey. The flowers are produced in a dense white panicle 20–40 cm long on a 2–3 m tall stem.