- genus Casuarina - genus of trees and shrubs widely naturalized in southern United States and West Indies; coextensive with the family Casuarinaceae and order Casuarinales
--1 is a kind of dicot genus, magnoliopsid genus
--1 is a member of Casuarinaceae, family Casuarinaceae
--1 has members:casuarina; she-oak; beefwood; Australian pine, Casuarina equisetfolia