Mammillaria pringlei var. columnaris F.Schmoll Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Mammillaria species Mammillaria pringlei Name Homonyms Mammillaria pringlei var. columnaris F.Schmoll ex R.T.Craig Mammillaria pringlei var. columnaris F.Schmoll