Threlkeldia is a genus of annuals or short-lived perennials in the family Amaranthaceae. There are two species, both of which are endemic to Australia. Together they occur in all Australian states except Queensland.
Threlkeldia inchoata (J.M.Black) J.M.Black, which occurs in New South Wales and South Australia. Threlkeldia diffusa, known as coast bonefruit
References
PlantNET - New South Wales Flora Online: Genus Threlkeldia