Eriocoma lettermanii (Vasey) Romasch., comb. nov.

Peterson, Paul M., Romaschenko, Konstantin, Soreng, Robert J. & Reyna, Jesus Valdes, 2019, A key to the North American genera of Stipeae (Poaceae, Pooideae) with descriptions and taxonomic names for species of Eriocoma, Neotrinia, Oloptum, and five new genera: Barkworthia, x Eriosella, Pseudoeriocoma, Ptilagrostiella, and Thorneochloa, PhytoKeys 126, pp. 89-125 : 95

Eriocoma lettermanii (Vasey) Romasch., comb. nov.

Stipa lettermanii Vasey, Bull. Torrey Bot. Club 13: 53. 1886 [Basionym] ≡ Stipa viridula var. lettermanii (Vasey) Vasey, Contr. U.S. Natl. Herb. 3(1): 50. 1892 ≡ Achnatherum lettermanii (Vasey) Barkworth, Phytologia 74(1): 9. 1993. Type: USA, Idaho, Snake River, Aug 1885, G.W. Letterman 102 (lectotype: US-556904! designated by Hitchcock, Manual. Grass. US ed. 1, 964. 1935 as to the collection no. 102, Barkworth & Maze identifed the US specimen number, Taxon 31(2): 294 f. 6. 1982).

Eriocoma lettermanii = Stipa viridula var. minor Vasey, Contr. U.S. Natl. Herb. 3(1): 50. 1892 ≡ Stipa occidentalis var. minor (Vasey) C.L. Hitchc., Vasc. Pl. Pacific NW 1: 714. 1969 ≡ Stipa minor (Vasey) Scribn., Bull. Div. Agrostol., U.S.D.A. 11: 46-47. 1898. Type: USA, Colorado, Kelso Mountain near Torrey’s Peak, 13000 ft, 13 Aug 1885, G.W. Letterman 95 (lectotype: US-556903! designated by Hitchcock, Contr. U.S. Natl. Herb. 24(7): 253. 1925).