Juncus polycephalus Gay ex Laharpe Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Juncaceae genus Juncus species Juncus densiflorus Name Homonyms Juncus polycephalus Michx. Juncus polycephalus D.Don, 1821 Juncus polycephalus Gay ex Laharpe Juncus polycephalus Don ex Hook. Juncus polycephalus Gay