Rorippa Scop.
Stamens 6; style 2-lobed; fr. a silicle or short silique; valves convex, 1-nerved or nerve obsolete. Seeds us. ∞, turgid, in 2 rows, sts irregularly so; cots accumbent. Aquatic to terrestrial annual to short-lived perennial herbs of c. 50 spp., mainly of temperate regions.