Nemesia is a genus of annuals, perennials and sub-shrubs, belonging to the Scrophulariaceae family, which are native to sandy coasts or disturbed ground in South Africa. Numerous hybrids have been selected, and the annual cultivars are popular with gardeners as bedding plants. In temperate regions they are usually treated as half-hardy, grown from seed in heat, and planted out after all danger of frost has passed. The flowers are two-lipped, with the upper lip consisting of four lobes and the lower lip two lobes.

Nemesia denticulata is a South African endemic vigorous mat-forming perennial to 20cm in height, with ovate, toothed leaves and racemes of light purple flowers in summer and early autumn.