Caltha palustris
"Caltha palustris" is a very variable species. Since most character states occur in almost any combination, this provides little basis for subdivisions. The following varieties are nevertheless widely recognised. They are listed with their respective synonyms. If an epithet based on the same type specimen is used at different levels, only the use at the highest taxonomic rank is listed, so as "C. himalensis" is already listed, "C. palustris" var. "himalensis" is not.