casuarina

any of a genus (Casuarina) of trees of the casuarina family native chiefly to Australia, esp. a species (C. equisetifolia) with jointed, green branchlets that bear whorls of scalelike leaves; beefwood; Australian pine

designating a family (Casuarinaceae, order Casuarinales) of dicotyledonous trees and shrubs, having slender, drooping branches