| Australia | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Azores | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Bhutan | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Bolivia | | | Foster, R. C. | 1958 | A catalogue of the ferns and flowering plants of Bolivia | Contr. Gray Herb. | 184: 1–223 |
| Bolivia | Cochabamba | | Jørgensen, P. M., M. H. Nee & S. G. Beck | 2014 | Catálogo de las plantas vasculares de Bolivia | Cat. Pl. Vasc. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. | 127(1–2): i–viii, 1–1744 |
| Bolivia | Cochabamba | | Jørgensen, P. M., M. H. Nee, S. G. Beck & A.F. Fuentes | 2015 en adelante | Catalogo de las plantas vasculares de Bolivia (actualizaciones en línea) | | |
| Brazil | | | Forzza, R. C. | 2010 | (none) | Lista de espécies Flora do Brasil | http://floradobrasil.jbrj.gov.br/2010 |
| Canary Islands | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Caribbean | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Caribbean | Bermuda | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Chile | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| China | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| China | Anhui | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Fujian | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Gansu | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Guangdong | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Guangxi | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Guizhou | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Hainan | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Hubei | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Hunan | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Jiangsu | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Shaanxi | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Shanxi | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Sichuan | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Taiwan | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Xinjiang Uygur | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Xizang Zizhiqu | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Yunnan | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| China | Zhejiang | | Flora of China Editorial Committee | 1994 | Flora of China (Verbenaceae through Solanaceae) | Fl. China | 17: 1–378 |
| Colombia | Antioquia | | Idárraga-Piedrahita, A., R. del C. Ortiz, R. Callejas Posada & M. Merello | 2011 | Listado de las plantas vasculares del departamento de Antioquia | Fl. Antioquia: Cat. | 2: 9–939 |
| India | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Japan | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Mexico | Sinaloa | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| New Zealand | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Pakistan | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| South Africa | | | Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas | 1987 | List of species of southern African plants | Mem. Bot. Surv. South Africa | 2(1–2): 1–152(pt. 1), 1–270(pt. 2) |
| South Africa | Natal | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| Thailand | | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| 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 | | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | Alabama | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Alabama | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | California | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| 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 | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | California | | Munz, P. A. & D. D. Keck | 1959 | (none) | Cal. Fl. | 1–1681 |
| United States | Colorado | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Connecticut | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Delaware | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | District of Columbia | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Florida | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| 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 | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Florida | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | Florida | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Georgia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Georgia | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Kentucky | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Louisiana | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Louisiana | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Maine | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Maryland | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Massachusetts | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Massachusetts | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Massachusetts | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Michigan | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Mississippi | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | New Jersey | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | New Mexico | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | New York | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | New York | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| 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 | North Carolina | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | North Carolina | Stanly | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Oregon | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Oregon | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Pennsylvania | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Rhode Island | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | South Carolina | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| 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 | Tennessee | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Tennessee | | Fernald, M. | 1950 | (none) | Manual (ed. 8) | i–lxiv, 1–1632 |
| United States | Tennessee | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | Tennessee | | Gleason, H. A. | 1968 | The Sympetalous Dicotyledoneae | Ill. Fl. N.E. U.S. | vol. 3. 596 pp |
| United States | Tennessee | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Tennessee | Carter | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Tennessee | Knox | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Texas | | Small, J. K. | 1933 | (none) | Man. S.E. Fl. | i–xxii, 1–1554 |
| United States | Virginia | | Radford, A. E., H. E. Ahles & C. R. Bell | 1968 | (none) | Man. Vasc. Fl. Carolinas | i–lxi, 1–1183 |
| United States | Virginia | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Virginia | Isle of Wight | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Virginia | Smyth | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | Washington | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |
| United States | West Virginia | | Nesom, G. L. | 2010 | A new species of Verbena (Verbenaceae) from northeastern Mexico and an overview of the Verbena officinalis group | Phytoneuron | 2010–13: 1–13 |