Cyperus rotundus [Nut Grass, Coco-grass, Purple Nut Sedge, Red Nut Sedge] is a species of sedge [Cyperaceae] native to Africa, southern and central Europe, and southern Asia. The word cyperus derives from the Greek kuperos and rotundus is from Latin, meaning “round”.
Cyperus rotundus is a perennial plant that may reach a height of up to 55 inches. The names “nut grass” and “nut sedge” [shared with the related species Cyperus esculentus] are derived from its tubers, that somewhat resemble nuts, although botanically they have nothing to do with nuts.
Cyperus rotundus is one of the most invasive weeds known, having spread out to a worldwide distribution in tropical and temperate regions. Despite its bad reputation, Cyperus rotundus has several beneficial uses in Folk Medicine, Modern pharmacology, Food [the tubers are edible], well dried grass as mats for sleeping.
Photos: Kebun Raya Bogor, West Java, Indonesia. 20061031