English: Sheoak; She-oak; Ironwood; Bull-oak; Buloke; Beefwood.
Botany: 4 genera, Allocasuarina, Casuarina, Ceuthostoma, Gymnostoma; 70 species; trees; Old World tropics, Australia, Pacific Islands; drooping twigs, equisetum like; roots have nitrogen-fixing nodules with actinomycete Frankia.
The monophyly of Casuarinaceae was supported in a 2003 molecular study of the family. In the Wettstein system Casuarinaceae was the only one placed in the order Verticillatae. In the Engler, Cronquist and Kubitzki systems, the Casuarinaceae were the only family placed in the order Casuarinales.