Lomandra hystrix, commonly known as green mat-rush, or creek mat-rush, is a perennial, rhizomatous herb found throughout eastern Australia. The leaves are 80 cm to 100 cm long, and generally have a leaf of about 10 mm to 20 mm wide. It grows beside watercourses in upland and mountain rain forest.

The plant is often used for revegetation and erosion control. The starchy, fleshy bases of the leaves are edible, tasting of raw peas. Even when the roots are exposed it will cling tenaciously in poor soils.

This species is closely related to L. longifolia; the inner bract and flowers are similar, but it differs in leaf apex, lack of conspicuous marginal sclerenchyma bands on leaves, and in inflorescence branching.