In southern Brazil, Paraguay and northern Argentina (Chaco Region) is the common name of a toxic plant. It belongs to the family Asteraceae. In Guaraní language it means water watertgrass plant or water watert grass. It is toxic and has medicinal uses. It is also known in the region as caángay. In Colombia we say chiva, chiba or hemosstatic plant, in Costa Rica Santa Lucia (and many more names) and in Brazil quebrapedra. Its scientific name is Ageratum conyzoides. this plant has many regional names in every country in South and Central America.
caápetay-it is a species of herbaceous plant, annual, of the family Asteraceae, about 70 cm high, very toxic, considered a weed, native to South America; it has opposite leaves, small pink or white flowers of nauseating smell, becoming a weed of the tropical zones of the world-It is used medicinally as antibacterial or antiartritic, also, for its essential oils, it is used in cosmetics; is toxic to mammals-