Small white flowers, 7-18mm, petals approx. 2x long as sepals.
Sepals reflexed. Hairless young fruit. Leaves rounded, deep-lobed with
clear incision between fleshy lobes. Trailing, rooting stems.
Frequent in S, SE, central Ireland. On mud or in shallow brackish water.
Similar: Ivy-leaved Crowfoot, R. hederaceus. Sepals nearly as long as petals. Leaves with no incision between lobes.