Calothamnus gracilis R.Br. Dataset GBIF Backbone Taxonomy Rank SPECIES Published in In: R. Br.]. Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Myrtales family Myrtaceae genus Melaleuca species Melaleuca gracilis Name Homonyms Calothamnus gracilis R.Br. ex W.T.Aiton Calothamnus gracilis R.Br.