Romulea is a genus in the Iridaceae family of about 90 species that is found both in South Africa and in Europe. Rootstock is a corm, globose, bell shaped to top shaped, compressed or asymmetric with a circular to crescent shaped basal ridge. This genus has flowers reminiscent of Crocus. Many are quite striking, especially the South African species and there is a great variation in colour and markings of the flowers. They are easy to grow in pots and many are easy from seed, flowering rather quickly in some cases.

Romulea saldanhensis, commonly known as Cadmium Froetang, is an endangered South African endemic species found in the Western Cape from St Helena Bay to Darling growing on seasonally wet granitic soils near the coast. From winter to spring it has orange yellow flowers with dark lines in the cup.