Spiraea opulifolia var. tomentosa Hook. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Physocarpus species Physocarpus capitatus Name Homonyms Spiraea opulifolia var. tomentosa Hook. ex Raf. Spiraea opulifolia var. tomentosa Hook.