Gunniopsis calva, commonly known as the smooth pigface, is a succulent plant in the iceplant family, Aizoaceae.

[1] The annual herb is glabrous and typically grows to a height of 20 centimetres (7.9 in).

It blooms between August and October producing small yellow solitary flowers.

[1] It is found around the margins of salt lakes in the area north of Port Augusta to central South Australia where it grows in sandy or clay soils.

[1] The species was first formally described by Robert Chinnock in 1983 in the article The Australian genus Gunniopsis Pax (Aizoaceae) in the Journal of the Adelaide Botanic Gardens.