Echinocereus rigidissimus var. rigidissimus Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Echinocereus species Echinocereus rigidissimus Name Homonyms Echinocereus rigidissimus var. rigidissimus Echinocereus rigidissimus subsp. rigidissimus