Water clover (Marsilea quadrifolia). Found along the shores of Bantam Lake, Litchfield County, Conn., whence it has been introudced into various parts of the country, notably eastern Massachusetts. Native of Europe and Asia (After Britton & Brown)
White water crowfoot (Ranunculus aquatilis). In ponds and streams, Nova Scotia to British Columbia, south to North Carolina and Florida. Also in Europe and Asia (After Britton & Brown)