Description

Cock's-foot grows in dense perennial tussocks to 20–140 centimetres tall, with grey-green leaves 20–50 cm long and up to 1.5 cm broad, and a distinctive tufted triangular flowerhead 10–15 cm long, which may be either green or red- to purple-tinged (usually green in shade, redder in full sun), turning pale grey-brown at seed maturity. The spikelets are 5–9 mm long, typically containing two to five flowers. It has a characteristic flattened stem base which distinguishes it from many other grasses.