Euphorbia ruegeliana Shuttlew. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Malpighiales family Euphorbiaceae genus Euphorbia species Euphorbia curtisii Name Homonyms Euphorbia ruegeliana Shuttlew. ex Boiss. Euphorbia ruegeliana Shuttlew.