Xyris malmeana L.B. Smith in Bol. Inspect. Fed. Obras Contra Secas. Rio 10: 126. 1939 sec. Charles N. Horn & al. 1994
- Holotype: Brazil, Pani; open sandy soil 2 km S of Vigia, Drouet 2136
- =Xyris glabrata (Seub.) Griseb. sensu Griseb., Fl. Brit. W. I.: 525. 1864
- =Xyris moraesii L.B. Smith & Downs in Proc. Bioi. Soc. Wash. 73: fig. 5. 1960
- Isotype: Brazil, Paraiba; s.loc., 30 Aug 1959, Moraes 2224
- Holotype: Brazil, Paraiba; s.loc., 30 Aug 1959, Moraes 2224
