Salix muhlenbergiana var. angustifolia Barratt Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Malpighiales family Salicaceae genus Salix species Salix humilis Name Homonyms Salix muhlenbergiana var. angustifolia Barratt Salix muhlenbergiana subsp. angustifolia Barratt