Panicum hylaeicum Mez in Notizbl. Bot. Gart. Berlin-Dahlem 7: 75. 1917 sec. Dávila & al. 2018
- =Panicum laxum var. pubescens Döll, Fl. Bras. 2(2): 213. 1877 syn. sec. Dávila & al. 2006
- =Panicum potamium var. pubescens Döll, Fl. Bras. 2(2): 214. 1877 syn. sec. Dávila & al. 2006
- =Panicum laxum var. amplissimum Hack. in Repert. Spec. Nov. Regni Veg. 6(21-26): 343. 1909 syn. sec. Dávila & al. 2006
- =Panicum doellii Mez in Bot. Jahrb. Syst. 56(Beibl. 125): 6. 1921 syn. sec. Dávila & al. 2006
- =Panicum guianense Hitchc. in Contr. U.S. Natl. Herb. 22(6): 487, f. 83. 1922 syn. sec. Dávila & al. 2006