It is one of the common names given in Argentina to a toxic plant of the Asteraceae family. Its scientific name is Ageratum conyzoides. It is considered weeds. It is also called there caangay, caapetay. In Guatemala it is called celestina, chucho herb, marrubio, mastranto and marjoram. In Colombia we call it chiba or hemostatic herb. In Costa Rica it is called Santa Lucia, sesumpate, serene, dog grass, windiness.
Niambú-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 areas of the world-It is used medicinally as an antibacterial or antiarthritic, also, for its essential oils, it is used in cosmetics; is toxic to mammals-