Ten.
An annual or short-lived perennial water-crowfoot which grows in shallow pools, ditches and in seasonally flooded areas which retain wet mud. It is almost always found on acidic substrates which are mesotrophic or relatively nutrient-poor. It is sometimes confused with Ivy-leaved Water-crowfoot (Ranunculus hederaceaus) and like that species it only has laminar, floating leaves. However, its leaves are a darker, shiny-green with a narrow sinus between the lower lobes and the flowers, which have reflexed sepals, are larger. It has a distinct western distribution in Britain, absent from much of Scotland and Ireland and it is common and widespread in Wales, particularly in upland areas. It is the most common water-crowfoot in West Glamorgan and a frequent member of the wet ditch flora which occurs at the sides of forest roads.
Native
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