English common name cogon grass, cotton wool-grass, sword grass
Scientific name Imperata cylindrica (Linn.) Beauv.
Perennial weed – strong and massive sharp-pointed rhizomes with extensive network, hard coarse leaves that hairy around the nodes especially at the base, may reach 50-80 cm. tall, reproduces with seed and rhizomes, growing well on the highland, flower all year round, found all over Thailand from sea level up to 2,000 meters