Rhamnus frangula f. angustifolia W.R.Franz Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rhamnaceae genus Frangula species Frangula alnus Name Homonyms Rhamnus frangula var. angustifolia Loudon Rhamnus frangula f. angustifolia W.R.Franz Rhamnus frangula var. angustifolia Wallr. Rhamnus frangula f. angustifolia (Wallr.) Beissn.