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 Stipa virlettii E. Fourn., Mexic. Pl. 2: 75. 1886. Comments. The description of Stipa virlettii (Type: Virlet 1376 from San Luis de Potosi , Mexico) appears to be a mixture of Stipa mucronata Kunth [= Nassella mucronata ] awns and Bromus laciniatus Beal (= Bromus carinatus Hook & Arn.) as determined by A.S. Hitchcock (isotype: US-A866077 fragm. ex P-Fourn-163!). Notes by A.S. Hitchcock on the US sheet with two fragment packets indicate that there are two species of Bromus on the herb. Fournier sheet: A is B. richardsonii Link; B is B. carinatus , also annotated by ASH.