The genus Maerua comprises about 60 species found in Africa and Asia. Maerua is a genus of plant in family Capparaceae. The origin of the name Maerua is uncertain, but it may come from Arabic.

Maerua nervosa commonly known as Natal Bush-cherry or Natal Spider Bush in English and Natal-witbos in Afrikaans and synonymously known as Maerua floribunda or Niebuhria nervosa, is a South African indigenous shrub or small tree of up to 3 meters found in the KwaZulu-Natal Province. The leaves are trifoliolate with occasional simple leaves present and leaflets up to 6 × 3.5 cm, ovate-elliptic to obovate, thinly textured, rather shiny on both surfaces, hairless with prominent veins; apex with a hair-like tip; margin entire. Flowers in axillary clusters; sepals green with puberulous margins; petals present, very small, white.