Physocarpus opulifolius var. nanus hort. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Physocarpus species Physocarpus opulifolius Name Homonyms Physocarpus opulifolius f. nanus (G.Kirchn.) Zabel Physocarpus opulifolius var. nanus Zabel