Small, white, 4-petalled flowers on erect flowering shoots. Cylindrical fruit with double row of seeds. Pinnate dark-green leaves, leaflets oval. Remain green through winter. Creeping, branched stems, rooting in mud. Water-cress growing in polluted water or areas with sheep may be infected with liver fluke - do not eat.
Very frequent. Shallow streams, ditches, muddy places.
Similar: Narrow-fruited Water-cress
Water-cress. Ballingeary, Co.Cork. October 2007