Watsonia is a genus of plants in the iris family, subfamily Crocoideae, native to South Africa. The genus is named after Sir William Watson, a British botanist. There are 52 species in southern Africa; all are perennial herbs growing from corms and producing erect spikes of showy flowers, and are adapted to a mediterranean-type climate. The most common species in cultivation is the pink-flowered Watsonia borbonica and its white mutant ‘Arderne’s White’. These were crossed with Watsonia meriana and other species in the early 20th century by breeders including John Cronin in Australia and Luther Burbank in California to produce a wide range of cultivars. Watsonia has been eclipsed in popularity by Gladiolus and other bulbs, and is now neglected by the nursery industry. In the South-West of Western Australia, six species have become naturalised from garden escapes along rivers, wetlands and seasonally wet ground.

Watsonia spectabilis, commonly known as Spectacular Watsonia, is a South African endemic perennial geophyte found in the Northern Cape and Western Cape provinces growing on sandy flats and plateaus, often found near water. It grows from 25 to 50 cm. tall and at the beginning of spring it has large tubular scarlet red flowers.