| Canada | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| Canada | | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| Canada | | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| Canada | | | Soreng, R. J. | 2003 | Hordeum. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 389–402 |
| 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 | | Bothmer, R. v., N. Jacobsen, C. Baden, R. B. Jørgensen & I. Linde-Laursen | 1991 | An ecogeographical study of the genus Hordeum | Syst. Ecogeogr. Stud. Crop Genepools | 7: 1–127 |
| Canada | British Columbia | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| Canada | British Columbia | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| 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 | | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| Mexico | | | Espejo Serna, M. 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. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 389–402 |
| Mexico | Baja California | | 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, M. A., A. R. López-Ferrari & J. Valdés-Reyna | 2000 | Poaceae | Monocot. Mexic. Sinopsis Floríst. | 10: 7–236 [and index] |
| 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 | Baja California | | Sánchez-Ken, J. G. | 2018 [2019] | Riqueza de especies, clasificación y listado de las gramíneas (Poaceae) de México Species richness, classification and a checklist of the grasses (Poaceae) of Mexico | Acta Bot. Mex. | 126: 1–115 |
| United States | | | Sánchez-Ken, J. G. | 2018 [2019] | Riqueza de especies, clasificación y listado de las gramíneas (Poaceae) de México Species richness, classification and a checklist of the grasses (Poaceae) of Mexico | Acta Bot. Mex. | 126: 1–115 |
| 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 | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | | | Munz, P. A. | 1974 | (none) | Fl. S. Calif. | 1–1086 |
| 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 | | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| United States | | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| United States | | | Soreng, R. J. | 2003 | Hordeum. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 389–402 |
| United States | California | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | California | | Munz, P. A. | 1974 | (none) | Fl. S. Calif. | 1–1086 |
| United States | California | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| United States | California | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| United States | California | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | California | | Bothmer, R. v., N. Jacobsen, C. Baden, R. B. Jørgensen & I. Linde-Laursen | 1991 | An ecogeographical study of the genus Hordeum | Syst. Ecogeogr. Stud. Crop Genepools | 7: 1–127 |
| United States | Idaho | | Gould, F. W. & R. Moran | 1981 | The grasses of Baja California, Mexico | Mem. San Diego Soc. Nat. Hist. | 12: 1–140 |
| United States | Idaho | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| United States | Oregon | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |
| United States | Oregon | | Bothmer, R. v., N. Jacobsen, C. Baden, R. B. Jørgensen & I. Linde-Laursen | 1991 | An ecogeographical study of the genus Hordeum | Syst. Ecogeogr. Stud. Crop Genepools | 7: 1–127 |
| United States | Washington | | Bothmer, R. v., N. Jacobsen, C. Baden, R. B. Jørgensen & I. Linde-Laursen | 1991 | An ecogeographical study of the genus Hordeum | Syst. Ecogeogr. Stud. Crop Genepools | 7: 1–127 |
| United States | Washington | | Bothmer, R. v., N. Jacobsen & O. Seberg | 1992 | Variation and taxonomy in Hordeum depressum and in the H. brachyatherum complex (Poaceae) | Nordic J. Bot. | 13: 3–17 |