Sisyrinchium subcernuum (E.P. Bicknell) Henrich & Goldblatt in Ann. Missouri Bot. Gard. 74: 908-910. 1987 sec. Espejo-Serna & López-Ferrari 2008
- =Hydastylus subcernuus E.P. Bicknell in Bull. Torrey Bot. Club 27: 385. 1900 syn. sec. Espejo-Serna & López-Ferrari 2008