Echinocactus whipplei var. glaucus K.Schum. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Sclerocactus species Sclerocactus glaucus Name Homonyms Echinocactus whipplei var. glaucus K.Schum. Echinocactus whipplei var. glaucus (K.Schum.) J.A.Purpus