| Canada | | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Canada | | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| Canada | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| Canada | | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| Canada | Alberta | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Canada | Alberta | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| Canada | Manitoba | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| 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 | Colorado | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| United States | Iowa | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Iowa | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | Kansas | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | Minnesota | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | Minnesota | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| United States | Montana | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | Nebraska | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| United States | Nebraska | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Nebraska | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | New Mexico | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | New Mexico | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| United States | Utah | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| United States | Washington | | Gleason, H. A. & A.J. Cronquist | 1968 | The Pteridophytoa, Gymnospermae and Monocotyledoneae | Ill. Fl. N. U.S. (ed. 3) | 1: 1–482 |
| United States | Washington | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |