Plazia belongs to the Asteraceae family of the Asterales order, a cosmopolite or plants found throughout most of the world including desert and frigid zones.
Family: Asteraceae Order: Asterales The order is a cosmopolite (plants found throughout most of the world including desert and frigid zones), and includes mostly herbaceous species, although a small number of trees (such as the giant Lobelia and the giant Senecio) and shrubs are also present. 
