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FOOL’S WATERCRESS Apium nodiflorum (Apiaceae) Height to 20cm. Creeping perennial whose leaves bear a passing resemblance to Watercress. Could also be confused with Lesser Water Parsnip (pxxx). Roots at nodes of lower stems; upright stems are hollow. Found in ditches and wet hollows. FLOWERS are white; borne in open umbels (Jul-Aug). FRUITS are egg-shaped and ridged. LEAVES are shiny and pinnate with oval, toothed leaflets STATUS-Widespread and locally common.