Rumex undulatus Besser ex Meisn. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rumex species Rumex aquaticus Name Homonyms Rumex undulatus Formánek Rumex undulatus Hornem. Rumex undulatus Willd. ex Spreng. Rumex undulatus Schrank Rumex undulatus Desf. Rumex undulatus Besser ex Meisn. Rumex undulatus Willd. Rumex undulatus Besser