Euphorbia hirtula Engelm. ex S.Watson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Malpighiales family Euphorbiaceae genus Euphorbia species Euphorbia serpillifolia Name Homonyms Euphorbia hirtula Engelm. ex S.Watson Euphorbia hirtula Engelm.