Oscularia is a genus of succulent flowering plants in the family Aizoaceae, native to semi-arid and rocky habitats in the Western Cape of South Africa. It was previously included within the related genus Lampranthus, but was split off as a separate genus, due to differences in its fruit and flower. The species are restricted to the Western Cape Province, South Africa, where they occur only in winter rainfall areas. Their habitat is typically rocky areas of sandstone. Osculum means small mouth in Latin. Oscularia therefore means a group of small mouths and refers to the toothed leaves of O. deltoides. The majority of the 22 species of Oscularia currently recognised, however, possess toothless leaves.

Oscularia piquetbergensis, just like O. deltoides, is another easy-to-grow succulent groundcover for low-maintenance and water-wise gardens. Oscularia piquetbergensis is a trailing, perennial shrublet. The stems are succulent and reddish. The sickle-shaped and grey-green leaves have characteristically club-shaped tips. All the observed leaf margins so far are toothless, although the literature does report inconspicuous teeth on rare occasions. The mildly scented flowers are produced in spring (September-October) and are mainly pink, although white forms also occur. Flowers open in the afternoons. Stamens, being mainly white below and above, are collected into a cone in the centre of the flower. Five separate nectary glands are present.