Fools Watercress - Apium nodiflorum
Family - Umbellifrea
A native perennial growing to 90cm (35in) commonly found in ponds, ditches, wet places and slow flowing water in England, Wales and Ireland but rare in Scotland. Shiny leaves of oval toothed leaflets with loose white flowers appearing July to August. Similar to Water Cress and Wild Celery (A. graveolens) which is shorter 50cm (19in) and more upright with a strong celery like smell.