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.