Pultenaea mutabilis, commonly known as the Newnes Plateau Bush-Pea, is a species of flowering plant in the family Fabaceae, native to Australia. This perennial shrub is a characteristic component of its natural environment, contributing to the biodiversity of the Australian landscape. The Newnes Plateau Bush-Pea typically presents as a low-growing, spreading shrub, often reaching a height of around 0.5 to 1 meter, though it can occasionally grow taller. Its growth habit is generally dense and somewhat tangled. The leaves are small, typically ovate to obovate in shape, and arranged alternately along the stems. They are usually green and can be slightly hairy. The most striking feature of Pultenaea mutabilis is its inflorescence. During its flowering season, which usually occurs in spring, the plant produces numerous pea-like flowers. These flowers are predominantly yellow, often with reddish or brown markings, particularly on the standard petal. The arrangement of these flowers, clustered at the ends of branches, creates a vibrant display. Following flowering, the plant develops small, inconspicuous pods that contain seeds. This species is endemic to a specific region within New South Wales, Australia, primarily found on the Newnes Plateau, which gives it its common name. It thrives in sandy or sandy-loam soils, often associated with heathland, woodland, and open forest ecosystems. Pultenaea mutabilis is adapted to the environmental conditions of its native habitat, which typically include well-drained soils and exposure to sunlight. While it is adapted to its native climate, specific cultivation requirements outside its natural range would necessitate well-drained soil and a sunny position. Ecologically, Pultenaea mutabilis plays a role in its native ecosystem, providing habitat and food sources for local fauna. As a member of the Fabaceae family, it has the potential to fix atmospheric nitrogen, contributing to soil fertility. There are no widely established ornamental, agricultural, medicinal, culinary, or economic uses documented for Pultenaea mutabilis. Its significance lies primarily in its contribution to the native flora and its ecological role within its specific geographic distribution. An interesting characteristic of Pultenaea mutabilis is its adaptation to fire-prone environments, a common feature of Australian vegetation. Like many plants in such habitats, it may rely on fire for seed germination or regeneration. The resilience and specific adaptations of this species to its unique environment highlight the intricate relationships between plants and their ecosystems.