Hexatheca Sond. ex F.Muell. Dataset GBIF Backbone Taxonomy Rank GENUS Published in Fragm. 8: 217 (1874) Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Althenia Name Homonyms Hexatheca C.B.Clarke Hexatheca Sond. ex F.Muell.