Allocasuarina is a genus of flowering plants in the family Casuarinaceae. These trees and shrubs are native to Australia and nearby islands, thriving in a variety of habitats, including coastal areas and dry woodlands. They are known for their slender, jointed branches that resemble pine needles, which help them adapt to arid environments. The plants in this genus are often used for erosion control and as windbreaks due to their hardy nature. Additionally, Allocasuarina species are important for wildlife, providing habitat and food for various animals, including birds and insects.