| Argentina | | | Dawson, G. | 1965 | Scrophulariaceae | Fl. Prov. Buenos Aires | 5: 251–298 |
| Argentina | Buenos Aires | | Dawson, G. | 1965 | Scrophulariaceae | Fl. Prov. Buenos Aires | 5: 251–298 |
| Argentina | Mendoza | | Dawson, G. | 1965 | Scrophulariaceae | Fl. Prov. Buenos Aires | 5: 251–298 |
| Argentina | Neuquén | | Dawson, G. | 1965 | Scrophulariaceae | Fl. Prov. Buenos Aires | 5: 251–298 |
| Argentina | Río Negro | | Dawson, G. | 1965 | Scrophulariaceae | Fl. Prov. Buenos Aires | 5: 251–298 |
| Canada | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| Canada | | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| Canada | | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| Canada | Nova Scotia | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| Chile | | | Marticorena, C. F. S. & M. Quezada | 1985 | Catálogo de la Flora Vascular de Chile | Gayana, Bot. | 42: 1–157 |
| China | Jiangsu | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| China | Sichuan | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| China | Xinjiang Uygur | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| China | Xizang Zizhiqu | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| China | Yunnan | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| China | Zhejiang | | Flora of China Editorial Committee | 1998 | Flora of China (Scrophulariaceae through Gesneriaceae) | Fl. China | 18: 1–449 |
| United States | | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | | | Great Plains Flora Association | 1986 | (none) | Fl. Great Plains | i–vii, 1–1392 |
| 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 | | | Correll, D. S. & M. C. Johnston | 1970 | (none) | Man. Vasc. Pl. Texas | i–xv, 1–1881 |
| United States | | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | | | Cronquist, A. J., A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren | 1984 | Vascular Plants of the Intermountain West, U.S.A. | Intermount. Fl. | 4: 1–573 |
| 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 | Alabama | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | California | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | California | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| 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 | Florida | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | Georgia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Kentucky | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Mississippi | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| 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 | South Carolina | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | South Dakota | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | Tennessee | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Texas | | Correll, D. S. & M. C. Johnston | 1970 | (none) | Man. Vasc. Pl. Texas | i–xv, 1–1881 |
| 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 |