Johnstonella grayi (Vasey & Rose) Hasenstab & M.G. Simpson in Syst. Bot. 37(3): 754. 2012 sec. Simpson & al. 2019
- ≡Krynitzkia grayi Vasey & Rose in Proc. U.S. Natl. Mus. 11: 536. 1888 syn. sec. Tropicos 2013
- =Cryptantha grayi (Vasey & Rose) J.F. Macbr. in Contr. Gray Herb. 48: 43. 1916 syn. sec. Tropicos 2013