| United States | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | | | Cronquist, A. J. | 1980 | Asteraceae | Vasc. Fl. S.E. U. S. | 1: i–xv, 1–261 |
| United States | | | Godfrey, R. K. & J. W. Wooten | 1981 | (none) | Aquatic Wetland Pl. S.E. U.S. Dicot. | 1–944 |
| United States | | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Florida | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Florida | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Florida | | Cronquist, A. J. | 1980 | Asteraceae | Vasc. Fl. S.E. U. S. | 1: i–xv, 1–261 |
| United States | Florida | | Godfrey, R. K. & J. W. Wooten | 1981 | (none) | Aquatic Wetland Pl. S.E. U.S. Dicot. | 1–944 |
| United States | Florida | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Georgia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Illinois | | Godfrey, R. K. & J. W. Wooten | 1981 | (none) | Aquatic Wetland Pl. S.E. U.S. Dicot. | 1–944 |
| United States | Illinois | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Minnesota | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Mississippi | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Mississippi | | Godfrey, R. K. & J. W. Wooten | 1981 | (none) | Aquatic Wetland Pl. S.E. U.S. Dicot. | 1–944 |
| United States | Mississippi | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Missouri | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Missouri | | Cronquist, A. J. | 1980 | Asteraceae | Vasc. Fl. S.E. U. S. | 1: i–xv, 1–261 |
| United States | North Carolina | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Ohio | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Ohio | | Cronquist, A. J. | 1980 | Asteraceae | Vasc. Fl. S.E. U. S. | 1: i–xv, 1–261 |
| United States | Pennsylvania | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Pennsylvania | | Godfrey, R. K. & J. W. Wooten | 1981 | (none) | Aquatic Wetland Pl. S.E. U.S. Dicot. | 1–944 |
| United States | South Carolina | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Texas | | Cronquist, A. J. | 1980 | Asteraceae | Vasc. Fl. S.E. U. S. | 1: i–xv, 1–261 |
| United States | Texas | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Virginia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | West Virginia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | West Virginia | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |