Gunniopsis calcarea, commonly known as the Nullarbor Gunniopsis[1] or the yellow flowered pigface,[2] is a succulent plant in the iceplant family, Aizoaceae. It is endemic to Australia.Gunniopsis calcarea, commonly known as the Nullarbor Gunniopsis[1] or the yellow flowered pigface,[2] is a succulent plant in the iceplant family, Aizoaceae. It is endemic to Australia.