What is the meaning of Casuarina?

Any of numerous trees, of the genera Casuarina and Allocasuarina, having segmented needle-like leaves; especially the ironwood and beefwood; she-oak.

casuarina (any of numerous trees, of the genera Casuarina and Allocasuarina, having segmented needle-like leaves; especially the ironwood and beefwood; she-oak)

Source: wiktionary.org