Bursaria is a small genus of eight species of flowering plants in the family Pittosporaceae, order Apiales. The genus is endemic to Australia, with species distributed across all states and territories, including the Northern Territory.
Plants range from low, bushy shrubs to slender small trees. A characteristic feature is their often-spiny branches. The leaves are simple, arranged alternately or in clusters, and vary in shape from linear and lance-shaped to egg-shaped or wedge-shaped, sometimes with toothed margins or a notched tip. The flowers are relatively small but produced in abundance: five sepals, five narrow oblong white petals, and five free stamens, arranged singly in racemes or panicles at branch tips or in leaf axils. The fruit is a distinctive flattened, thin-walled capsule containing ten to fifty kidney-shaped seeds — a shape that gave the genus its name, from the Latin bursa meaning "bag" or "satchel".
The most widespread and well-known member is Bursaria spinosa (sweet bursaria or blackthorn), which was the first species formally described when Antonio Cavanilles established the genus in 1797 in his Icones et descriptiones plantarum. Bursaria spinosa occurs across South Australia, Queensland, New South Wales, Victoria, and Tasmania, and is notable for its fragrant white flowers and ecological importance as a habitat plant.
Etymology
The genus name Bursaria derives from the Latin bursa, meaning "bag" or "satchel", a reference to the distinctive flattened, pouch-like capsule fruit. The genus was formally established in 1797 by the Spanish botanist Antonio Cavanilles.
Distribution
Bursaria is endemic to Australia, with species recorded across all states and the Northern Territory. Bursaria spinosa, the most widespread species, is found in South Australia, Queensland, New South Wales, Victoria, and Tasmania; other species are more narrowly restricted, such as Bursaria occidentalis (Western Australia) and Bursaria incana (Northern Territory and Queensland).
Taxonomy Notes
The genus Bursaria was first formally described in 1797 by Antonio Cavanilles in Icones et descriptiones plantarum, with Bursaria spinosa as the founding species. It belongs to the family Pittosporaceae in the order Apiales. As of October 2021, the Australian Plant Census recognises eight accepted species.
