This name is a synonym.
Briza oblonga Moench, Methodus: 185 (1794), nom. superfl.
Poa megastachya Koeler, Descr. Gramin.: 181 (1802).
Poa eragrostis (L.) Brot., Fl. Lusit. 1: 103 (1804), nom. illeg.
Eragrostis major Host, Icon. Descr. Gram. Austriac. 4: t. 24 (1809), nom. superfl.
Megastachya oblonga P.Beauv., Ess. Agrostogr.: 74 (1812), nom. superfl.
Eragrostis oblonga Baumg., Enum. Stirp. Transsilv. 3: 238 (1816), nom. illeg.
Poa oblonga Baumg., Enum. Stirp. Transsilv. 3: 238 (1816), nom. superfl.
Megastachya eragrostis (L.) Roem. & Schult., Syst. Veg., ed. 15 bis 2: 575, 584 (1817).
Eragrostis megastachya (Koeler) Link, Hort. Berol. 1: 187 (1827).
Eragrostis vulgaris var. megastachya (Koeler) Coss. & Germ., Fl. Descr. Anal. Paris: 641 (1845).
Eragrostis pooides var. megastachya (Koeler) A.Gray, Manual, ed. 2: 563 (1856).
Eragrostis pooides var. major (Host) Neilr., Fl. Nied.-Oesterr.: 62 (1859), nom. illeg.
Eragrostis minor var. major Beck, Fl. Nieder-Österreich 1: 118 (1890).
Eragrostis eragrostis (L.) MacMill., Metasp. Minnesota Valley: 75 (1892), not validly publ.
Eragrostis minor var. megastachya (Koeler) Burtt Davy in W>L.Jepson, Fl. West Mid. Calif.: 60 (1901), nom. illeg.
Eragrostis minor var. megastycha (Koeler) Burtt Davy in W.L.Jepson, Fl. W. Calif.: 60 (1901).
Eragrostis vulgaris subsp. major (Beck) Rouy in G.Rouy & J.Foucaud, Fl. France 14: 462 (1913).
Eragrostis eragrostis var. megastachya (Koeler) Farw., Rep. (Annual) Michigan Acad. Sci. 17: 182 (1916), not validly publ.
Eragrostis vulgaris subsp. megastachya (Koeler) Douin in G.E.M.Bonnier, Fl. Ill. France 12: 32 (1934).
Eragrostis cilianensis var. major (Beck) Maire in É.Jahandiez & al., Cat. Pl. Maroc 4: 935 (1941).
Eragrostis cilianensis subsp. major (Beck) Maire & Weiller, Fl. Afrique N. 2: 175 (1953).
Eragrostis cilianensis f. megastachya (Koeler) Maire & Weiller, Fl. Afrique N. 2: 175 (1953).