| Canada | | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Canada | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. N. 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 | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| Canada | | | Soreng, R. J. | 2003 | Hordeum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 389–402 |
| Canada | Newfoundland | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Canada | Quebec | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Mexico | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. N. 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 | | | Espejo Serna, A., A. R. López-Ferrari & J. Valdés-Reyna | 2000 | Poaceae | Monocot. Mexic. Sinopsis Floríst. | 10: 7–236 [and index] |
| Mexico | | | Soreng, R. J. | 2003 | Hordeum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 389–402 |
| Mexico | | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| Mexico | Baja California | | Espejo Serna, A., A. R. López-Ferrari & J. Valdés-Reyna | 2000 | Poaceae | Monocot. Mexic. Sinopsis Floríst. | 10: 7–236 [and index] |
| Mexico | Baja California | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| United States | | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| United States | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | | | Cronquist, A.J., A. H. Holmgren, N. H. Holmgren & Reveal | 1977 | Vascular Plants of the Intermountain West, U.S.A. | Intermount. Fl. | 6: 1–584 |
| United States | | | Munz, P. A. | 1974 | (none) | Fl. S. Calif. | 1–1086 |
| United States | | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | | | Soreng, R. J. | 2003 | Hordeum. In Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae | Contr. U.S. Natl. Herb. | 48: 389–402 |
| United States | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. N. 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 | Alaska | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | California | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | California | | Munz, P. A. | 1974 | (none) | Fl. S. Calif. | 1–1086 |
| United States | California | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | California | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Idaho | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |