Austrocortinarius australiensis, commonly known as the skirt webcap, is a species of mushroom in the family Cortinariaceae[2] which is native to Australia and New Zealand.

The white mushrooms appear in autumn and can grow very large, with their caps reaching 30 cm (12 in) in diameter.

The species was originally described by John Burton Cleland and Edwin Cheel in 1918 as Rozites australiensis.

[6] Classified in Cortinarius subgenus Phlegmacium, this was the type species of series Australiensium as defined by Bruno Gasparini in 2006.

This is a grouping of related Southern Hemisphere species characterized by an abundant universal veil, medium to large and pale fruitbodies, and ellipsoid to amygdaliform (almond-shaped) spores.

[12] Remnants of a ring often persist on the stipe until maturity, as well as bits of the universal veil that once enclosed the immature mushroom.