Arctotheca populifolia is a species of flowering plant in the aster family known by the common names beach daisy, Cape beach daisy, South African beach daisy, coast capeweed, dune arctotheca, beach pumpkin, sea pumpkin, dune cabbage, and in South Africa, seepampoen, tonteldoek, and strandgousblom. This species is native to South Africa. It was introduced to Australia and is now a common weed of coastal areas in New South Wales, South Australia, Tasmania, Victoria, and Western Australia.