Gahnia aspera, commonly known as rough saw-sedge or round sawsedge, is a tussock-forming perennial herb native to a variety of habitats including wet sclerophyll forests, coastal swamps, and heathlands in eastern Australia, as well as occurring in Malaysia, New Guinea, and Pacific islands. It typically grows to a height of 20-39 inches (50-100 cm) with a similar spread, featuring tough, strap-like leaves and producing inflorescences of small, creamy flowers in spring and summer. The flowers are not particularly showy but are followed by distinctive shiny red-brown nuts that add visual interest to the plant.

Rough saw-sedge is valued for its ability to thrive in a range of garden settings, particularly in moist soils and part shade to full sun conditions. It is often used for habitat restoration, erosion control, and as a garden ornamental, providing shelter and food for small birds and insects. While it prefers moist, well-drained soils, it can tolerate periods of dryness once established. It is generally low-maintenance but can be trimmed back if it becomes too untidy. In cultivation outside its native range, care should be taken as it has the potential to become invasive.CC BY-SA 4.0