Dimorphotheca is a southern African genus, belonging to the family Asteraceae, and is found in South Africa (Western and Northern Cape) and Namibia. It consists of 15 species. The genus name Dimorpotheca means fruits with two forms and is derived from Greek dis, meaning two, morphe, shape or form and theka, a fruit, referring to the different kinds of seeds produced by the ray and the disc florets in some species, where the fruits formed by the ray florets are wingless and stick-like and the fruits formed by the disc florets are flattened and 2-winged.

Dimorphotheca barberae, commonly known as Eastern Cape Rain Daisy in English or Bergbietou in Afrikaans and synonymously known as Dimorphotheca lilacina, Osteospermum barberae or Osteospermum barberiae, is a South African endemic flowering perennial found in the Eastern Cape province. Dimorphotheca barberae is a broadleaf evergreen or semi-evergreen perennial groundcover with green foliage. In spring purple flowers emerge. Grows to 30cm tall and will spread to 90cm. It loves sunlight and thrives on neglect, having low water needs. Does well in average and well-drained soil.