Allocasuarina and Casuarina trees, all members of the Casuarinaceae family of plants, are commonly called She-oaks.
She-oaks are well adapted to hot, dry conditions with their leaves reduced to rings of tiny teeth on specialised, narrow branchlets. They often form a dense grove of trees as fallen branchlets (leaf needles) form a carpet that inhibits the growing of ground-cover. A beautifully haunting sound is produced when wind blows through the foliage of these trees.
Those in the Allocasuarina genus are distinguished from those in the Casuarina genus by distinct differences in their cones and fruit.