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 aquatica, commonly known as Waterfroetang in Afrikaans and Water Stars in English, is an endangered semi-aquatic South African endemic species found in the Western Cape province from Piketberg to Malmesbury growing in seasonal pools on clay flats. Plants are 20-60 cm high and grow from a corm with an oblique basal ridge. They have two or three leaves and white honey scented flowers with a yellow cup from mid-winter to early spring. Bracts have narrow membranous margins and inner bracts have wide membranous margins.