Also found in: Dictionary, Thesaurus, Wikipedia.
(awlwort), a genus of annual plants of the family Cruciferae. The plants are dwarf, usually aquatic herbs with a rosette of awl-shaped leaves and a leafless stem (scape). The white, frequently cleistogamous flowers are in few-flowered racemes. The fruit is a bulging ellipsoid silicle. There are two species in the temperate belt of Eurasia and in the hills of East Africa. The USSR has one species, S. aquatica. The plant grows in shallow waters and on the sandy shores of reservoirs in the European USSR, in the southern part of Western Siberia, and in the Far East. It apparently is eaten by swimming birds.