Place of publication: 
                    
                        Contr. U.S. Natl. Herb. 14:375.  1912, nom. cons. (Steudel, Nomencl. bot. ed. 2, 1:219.  1840, pro syn.)
                    
                 
                
                
                    Comment: 
                    
                        conserved (nom. cons.)(Melbourne ICN Art. 14.10 & App. IV) over the earlier homonym (Melbourne ICN Art. 53) B. gracilis Vasey, nom. rej.