| Canada | | | Hickman, J. C. | 1993 | (none) | The Jepson Manual: Higher Plants of California | 1–1400 |
| Canada | | | Soreng, R. J. & J. Valdés-Reyna | 2003 | Achnatherum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 15–18 |
| Canada | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| Canada | British Columbia | | Hickman, J. C. | 1993 | (none) | The Jepson Manual: Higher Plants of California | 1–1400 |
| Mexico | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| Mexico | | | Hickman, J. C. | 1993 | (none) | The Jepson Manual: Higher Plants of California | 1–1400 |
| Mexico | | | Soreng, R. J. & J. Valdés-Reyna | 2003 | Achnatherum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 15–18 |
| Mexico | Baja California | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Chihuahua | | Herrera Arrieta, Y. & A. Cortés Ortiz | 2010 | Listado florístico y aspectos ecológicos de la familia Poaceae para Chihuahua, Durango y Zacatecas, México | J. Bot. Res. Inst. Texas | 4(2): 711–738 |
| Mexico | Chihuahua | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| United States | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| United States | | | Hickman, J. C. | 1993 | (none) | The Jepson Manual: Higher Plants of California | 1–1400 |
| United States | | | Soreng, R. J. & J. Valdés-Reyna | 2003 | Achnatherum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 15–18 |
| United States | California | | Hickman, J. C. | 1993 | (none) | The Jepson Manual: Higher Plants of California | 1–1400 |