Sporobolus collinus P. M. Peterson, Romasch. & Soreng 2025, comb. nov.

Sporobolus collinus (Trin.) P. M. Peterson, Romasch. & Soreng, comb. nov. Eragrostis collina Trin., Mém. Acad. Imp. Sci. St. - Pétersbourg, Sér. 6, Sci. Math. 1 (4): 413. 1830 ≡ Poa collina (Trin.) K. Koch, Linnaea 21 (4): 405. 1848, nom. illeg. hom., non Poa collina Host. ≡ Poa tatarica Fisch. ex Griseb., Bess. Cat. Krzem. Suppl. 2: 13. 1814, nom. nud. ≡ Eragrostis tatarica (Fisch. ex Griseb.) Nevski, Trudy Bot. Inst. Akad. Nauk S. S. S. R., Ser. 1, Fl. Sist. Vyssh. Rast.: 226. 1937 ≡ Eragrostis tatarica (Fisch. ex Griseb.) Henrard, Blumea 3 (3): 425. 1940, isonym. Type: Persia, E deserto Rhymnico, Hbr. Gorenki, F. E. L. Fischer s. n. (lectotype, designated here: LE-TRIN-2319.06 [microfiche image!]). = Aira arundinacea L., Sp. Pl. 1: 64. 1753 ≡ Festuca arundinacea (L.) Lilj., Utkast Sv. Fl. (ed. 2): 47. 1798, hom. Illeg, non Festuca arundinacea Schreb. ≡ Poa arundinacea (L.) Link, Hort. Berol. [Link] 1: 176. 1827 ≡ Eragrostis arundinacea (L.) Roshev., Fl. SSSR 2: 319. 1934 ≡ Boriskellera arundinacea (L.) Terechov, Del. Sem. Hort. Reg. Bot. Kujbyshev: 13. 1938 ≡ Psilantha arundinacea (L.) Tzvelev, Bot. Zhurn. (Moscow & Leningrad) 53: 311. 1968. Type: Turkey, Aras Valley, 1100–1200 m, 19 Jul 1966, P. H. Davis 46876 (neotype, designated by S. A. Renvoize in Cafferty et al. 2000, Taxon 49 (2): 244: K; isoneotype: E, US-2597835!). Notes. We are rejecting the earlier lectotype by Tzvelev (1976) in Zlaki SSSR 635. Nauka Publishers, Leningrad Section, Leningrad, designating Snowitz 518 as the lectotype for Eragrostis collina because it was not mentioned by Trinius in the original publication.