Carex banksiana, commonly known as Fine-leaved Bastard Grass, is a species of sedge belonging to the Cyperaceae family. This perennial herb is characterized by its clumping growth habit, forming dense tussocks that can reach a height of approximately 30 to 60 centimeters. The plant's most distinctive feature is its foliage: the leaves are exceptionally fine and narrow, often linear, and typically measure between 1 to 2 millimeters in width. These leaves are a vibrant green and arise from the base of the plant, contributing to its delicate appearance. The inflorescence of Carex banksiana consists of one to several spikes, which are typically erect or slightly nodding. The male and female flowers are borne on the same plant, a characteristic known as monoecy, though they are usually segregated into different parts of the inflorescence or on separate spikes. The female flowers are subtended by bracts, and the resulting fruits are small, hard achenes, characteristic of the sedge family. The exact details of its flowering and fruiting times can vary depending on environmental conditions and geographic location within its native range. Carex banksiana is native to Australia, where it is found in specific regions, primarily in coastal areas and sandy soils. Its natural habitat often includes dunes, coastal heaths, and sandy grasslands, where it is adapted to well-drained, often nutrient-poor substrates. While not widely cultivated, its tolerance for sandy soils and coastal conditions suggests potential for use in ecological restoration projects or in specialized gardens focusing on native Australian flora. It thrives in full sun to partial shade and requires minimal watering once established, making it a relatively low-maintenance plant in suitable environments. Ecologically, Carex banksiana plays a role in stabilizing sandy soils and providing habitat for small invertebrates within its native ecosystems. Its fine foliage can offer shelter and contribute to the overall biodiversity of coastal plant communities. While there is no widespread documented ornamental, agricultural, medicinal, or economic importance attributed to this species, its presence is significant for the ecological integrity of the coastal environments it inhabits. Its specific adaptations to sandy, exposed conditions, such as its fine, resilient leaves, are key to its survival in these challenging habitats. The plant's ability to thrive in such environments highlights the specialized adaptations found within the diverse genus Carex.