Polypogon elongatus Kunth, Nov. Gen. Sp. (quarto ed.) 1: 134-135. 1816 ["1815"] sec. Dávila & al. 2018
- =Alopecurus elongatus (Kunth) Poir., Encycl. 5: 495. 1817 syn. sec. Dávila & al. 2006
- =Polypogon intermedius Carmich. in Trans. Linn. Soc. London 12: 504. 1819 syn. sec. Dávila & al. 2006
- =Polypogon inaequalis Trin., Gram. Panic.: 24. 1826 syn. sec. Dávila & al. 2006
- =Nowodworskya agrostoides J. Presl, Reliq. Haenk. 1: 351, t. 80. 1830 syn. sec. Dávila & al. 2006
- =Raspailia agrostoidea J. Presl, Reliq. Haenk. 1(4-5): 239, t. 40. 1830 syn. sec. Dávila & al. 2006
- =Polypogon elongatus var. strictus É. Desv., Fl. Chil. 6: 302. 1854 syn. sec. Dávila & al. 2006
- =Polypogon mexicanus hort. ex Steud., Syn. Pl. Glumac. 1: 185. 1855 syn. sec. Dávila & al. 2006
- =Chaetotropis elongata (Kunth) Björkman, Symb. Bot. Upsal. 17(1): 14. 1960 syn. sec. Dávila & al. 2006
- =Chaetotropis elongata (Kunth) Björkman var. elongata, Symb. Bot. Upsal. 17(1): 14. 1960 syn. sec. Dávila & al. 2006
- =Chaetotropis elongata var. longearistata Nicora, Fl. Prov. Buenos Aires 4(2): 208. 1970 syn. sec. Dávila & al. 2006