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Casuarina, the long drooping branchlets are thought to resemble the feathers of the cassowary, from the Malay word casuari. Evergreen trees or shrubs with slender jointed branches. Leaves reduced to a whorl of teeth at each node. Flowers unisexual or functionally so, male flowers with 1 stamen; female flowers crowded, ovaries fused at maturity to form a cone. The number of leaf-teeth and the size and shape of the cone and the nature of the valves are useful diagnostic characters. Chief Australian genera are Allocasuarina and Casuarina.