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 Author Peterson, Paul M. Department of Botany MRC- 166, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013 - 7012, USA peterson@si.edu Author Romaschenko, Konstantin Department of Botany MRC- 166, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013 - 7012, USA Author Soreng, Robert J. https://orcid.org/0000-0002-8358-4915 Department of Botany MRC- 166, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013 - 7012, USA Author Reyna, Jesus Valdes Departamento de Botanica, Universidad Autonoma Agraria Antonio Narro, Saltillo, C. P. 25315, Mexico text PhytoKeys 2019 2019-07-16 126 89 125 http://dx.doi.org/10.3897/phytokeys.126.34096 journal article http://dx.doi.org/10.3897/phytokeys.126.34096 1314-2003-126-89 FFC2D06D486FF317CE32972BDE2BFF93 3348547 Eriocoma perplexa (Hoge & Barkworth) Romasch., comb. nov. Achnatherum perplexum Hoge & Barkworth, Phytologia 74(1): 11. 1993 [Basionym] ≡ Stipa perplexa (Hoge & Barkworth) Wipff & S.D. Jones, Phytologia 77(6): 461. 1995. Type: USA, New Mexico, Bernalillo Co., Cibola National Forest, 1.5 mi E of USFS road 413, 9 mi S of Tijeres on NM 14, 8 Sep 1985, M.E. Barkworth 4764 (holotype: US-3239133!; isotype: RSA-0000391 [image!]).