Sporobolus airoides subsp. regis (I.M. Johnst.) Wipff & S.D. Jones Sporobolus airoides subsp. regis (I.M. Johnst.) Wipff & S.D. Jones in Sida 16(1): 164. 1994 sec. Dávila & al. 2018≡Sporobolus regis I.M. Johnst. in J. Arnold Arbor. 24: 393. 1943 syn. sec. Dávila & al. 2006