Quercus hemisphaerica var. nana (Willd.) Sarg. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Fagaceae genus Quercus species Quercus nigra Name Homonyms Quercus hemisphaerica var. nana (Willd.) Sarg. Quercus hemisphaerica var. nana (Willd.) Nutt.