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 tortuosa, commonly known as Twisted Froetang, is a South African endemic species found in the Northern Cape and Western Cape provinces growing in sandstone and clay soils. From autumn to spring it produces eye-catching scented yellow flowers with or without black marks of blotches in the throat and a distinctive corm that is flattened with a wide fan-like basal ridge. Leaves of this species in habitat are sometimes spirally twisted.