Carmichaelia australis, commonly known as New Zealand common broom, is a species of flowering plant in the family Fabaceae. It is a significant component of the native flora of New Zealand, often found in coastal and lowland areas. This shrub plays a role in its ecosystem, contributing to the biodiversity of its native habitats. The plant typically presents as a much-branched, erect shrub, often reaching heights of up to 2 meters. Its growth habit is generally open and somewhat spreading. A distinctive feature of Carmichaelia australis is its foliage. The leaves are compound, usually trifoliate, with leaflets that are obovate to elliptic in shape. The leaflets are typically small, measuring around 5-15 mm in length, and are often a dull green color. The bark is smooth on younger stems, becoming rougher with age. Flowering occurs from late spring through summer. The flowers are characteristic of the pea family (Fabaceae), being papilionaceous in form. They are typically white to pale pink or lilac, borne in racemes or panicles. Each flower is relatively small, around 5-8 mm long. Following successful pollination, the plant produces fruit in the form of small, flattened pods. These pods are typically ovate and contain a few small, hard seeds. The seeds are generally brown and reniform. Carmichaelia australis is endemic to New Zealand, with its natural distribution encompassing both the North and South Islands. It thrives in a variety of habitats, commonly found in coastal regions, open scrublands, and along the edges of forests. It prefers well-drained soils and can tolerate a range of light conditions, from full sun to partial shade. While it is adapted to its native environment, it can also be cultivated in gardens, requiring similar conditions to those found in its natural habitat. Ecologically, Carmichaelia australis provides habitat and food sources for native insects and birds. Its nitrogen-fixing capabilities, common to many legumes, can also contribute to soil fertility in its native environment. While not widely used for ornamental purposes compared to some other broom species, its natural form and delicate flowers offer a subtle beauty. There is no significant documented history of agricultural, medicinal, or culinary use for this specific species. An interesting adaptation observed in some Carmichaelia species, including Carmichaelia australis, is the presence of photosynthetic stems, which can contribute to the plant's survival, particularly when leaf fall occurs or in environments with limited resources. This characteristic allows the plant to continue photosynthesis even with reduced leaf surface area.