Probably Lampranthus candidus or a close taxon. Succulent sub-shrub of the Aizoaceae family, native to the rocky areas and dry slopes of the Western Cape, in South Africa.
Its habit is semi-spreading to slightly upright, forming wide and low masses that spread generously around rocks. The stems are thin and branched, bearing small cylindrical fleshy leaves. In bloom, the plant is entirely covered with pure white flowers, with numerous fine and radiant petals framing a bright yellow heart, each flower reaching 3 to 4 centimeters in diameter. The contrast between the immaculate white of the flowers and the bright yellow center is one of the most striking features of this plant.
In its natural habitat, flowering extends from the southern spring; in Mediterranean cultivation, it generally occurs from April to June.
Same requirements as other Lampranthus: very well-drained, poor soil, strict full sun, summer drought tolerated. Sensitive to prolonged wet cold. Among the white-flowered Aizoaceae, it is one of the few to produce such a dense and bright bloom, capable of illuminating a sunny rock garden.