Eriocaulon australasicum (common names southern pipewort, austral pipewort) is an endangered monocotyledonous plant in the Eriocaulaceae family found in Australia, in Victoria, South Australia and New South Wales.

Flowering and seed-set swiftly follow falling water levels and the drying-out of depressions.

[7] It was first described as Electrosperma australasicum by Ferdinand von Mueller in 1854, who found it "on wet places along the Murray, towards the junction of the Murrumbidgee".

[3][4] Threats to the species are climate change, since Eriocaulon australasicum occurs in seasonally wet habitats, and probably requires a period of inundation to enable stored seed to germinate.

Additionally, fuel reduction programs in Victorian parks and reserves have been modified to avoid disturbance at sites where Eriocaulon australasicum occurs.