Gahnia procera is a tall, robust perennial sedge, immediately recognizable by its dense tussocks of long, narrow leaves and distinctive flowering spikes. These dark brown inflorescences tower above the foliage, allowing it to disperse seeds effectively in its native habitats, often wetlands or moist, open forests. Adapted to marshy soils, gahnia procera's root system excels in waterlogged environments, aiding in erosion control.