| Cinna  arkansana | Cinna arkansana (Nuttall) G. C. Tucker, Harvard Pap. Bot. 9: 62. 1996. | Greenia arkansana Nuttall 1835. |  | 
				| Greenia  arkansana | Greenia arkansana Nuttall, Trans. Amer. Philos. Soc., ser. 2. 5: 142. 1835. |  | OKLAHOMA [cited as "Arkansas Terr."]: Choctaw Co.: Red River near the Kiamesha [Kiamichi], s.d., Nuttall s.n. (holotype: BM; isotypes: PH, US(fragm)). | 
				| Limnas  arkansana | Limnas arkansana (Nuttall) Trinius ex Steudel, Nomencl. Bot., ed. 2. 2: 45. 1841. | Greenia arkansana Nuttall 1835. |  | 
				| Limnas  pilosa | Limnas pilosa (Trinius) Steudel, Syn. Pl. Glumac. 1: 421. 1854. | Sclerachne pilosa Trinius 1845. |  | 
				| Limnodea  arkansana  var. pilosa | Limnodea arkansana (Nuttall) L. H. Dewey, var. pilosa (Trinius) Lamson- Scribner, U.S.D.A. Div. Agrost. Bull. 7(ed. 3): 139. 1900. | Sclerachne pilosa Trinius 1845. |  | 
				| Muhlenbergia  hirtula | Muhlenbergia hirtula Steudel, Syn. Pl. Glumac. 1: 180. 1854. |  | TEXAS: TEXAS: Without data, Drummond s.n. (holotype: P; isotype: US(fragm)). | 
				| Sclerachne  arkansana | Sclerachne arkansana (Nuttall) Torrey ex Trinius, Mém. Acad. Imp. Sci. Saint- Petersbourg, Ser. 6, Sci. Math., Seconde Pt. Sci. Nat. 4: 273. 1845. | Greenia arkansana Nuttall 1835. |  | 
				| Sclerachne  pilosa | Sclerachne pilosa Trinius, Mém. Acad. Imp. Sci. Saint-Petersbourg, Ser. 6, Sci. Math., Seconde Pt. Sci. Nat. 4: 275. 1845. |  | TEXAS | 
				| Stipa  demissa | Stipa demissa Steudel, Syn. Pl. Glumac. 1: 130. 1854. |  | LOUISIANA: Orleans Par.: New Orleans, 1832, Drummond 465 (holotype: P; isotype: US(fragm)). | 
				| Thurberia  arkansana | Thurberia arkansana (Nuttall) Bentham ex Vasey, Dept. Agric. Spec. Rep. 63: 16. 1883. | Greenia arkansana Nuttall 1835. |  | 
				| Thurberia  pilosa | Thurberia pilosa (Trinius) Vasey, U.S.D.A. Spec. Rep. 63: 16. 1883. | Sclerachne pilosa Trinius 1845. |  |