It produces fruit bodies that are white, with caps up to 5.5 cm (2.2 in) in diameter, attached to short, thick stems.

[2] In a more recent classification proposed by Yang and colleagues, O. australis is in section Oudemansiella, which contains tropical to south temperate species, such as O. platensis, O. canarii and O. crassifolia.

These species are characterised by having an ixotrichoderm cap cuticle, meaning it is made of gelatinized filamentous hyphae of different lengths arranged in roughly parallel fashion.

[3] New Zealand mycologist Geoff Ridley has proposed the common name "porcelain slimecap" for the mushroom.

[4] Oudemansiella australis mushrooms have a cap that is 3–5.5 cm (1.2–2.2 in) in diameter, and initially white becoming a light yellowish brown (fawn) in age.