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 anisocarpa, commonly known as Yellowmouth Lionface, is a South African endemic species found in the Northern Cape and Western Cape provinces. It is an erect annual reaching 40 cm in height. The stem is reddish and ridged in its lower part. The leaves are lance-shaped to elliptic with toothed margins. Leaf dimensions are about 2,5 cm long by 1,5 cm wide. Narrow, green, finger-like sepals spread against the back of the corolla. The two-lipped flowers are white on the four-lobed upper lip and yellow on the broad lower one.