| 1 | Native | Asia-Temperate | China | China | Xizang Zizhiqu | | Ohnishi, O. & T. Konishi. 2001. Cultivated and wild buckwheat species in eastern Tibet. Fagopyrum 18:3-8. |
| 1 | Native | Asia-Temperate | China | China | Yunnan Sheng | | Ohnishi, O. 1998. Search for the wild ancestor of buckwheat III. The wild ancestor of cultivated common buckwheat, and of Tatary buckwheat. Econ. Bot. 52:123-133. Note: it recognized "Fagopyrum esculentum subsp. ancestralis" |
| 2 | Cultivated | Africa | East Tropical Africa | Uganda | | | PROTABASE, the information base of PROTA (Plant Resources of Tropical Africa) (on-line resource). |
| 2 | Cultivated | Africa | Northeast Tropical Africa | Ethiopia | | | Hedberg, I. & S. Edwards. 1989-. Flora of Ethiopia Note: Eritrea added in 2000 |
| 2 | Cultivated | Africa | South Tropical Africa | Zimbabwe | | | PROTABASE, the information base of PROTA (Plant Resources of Tropical Africa) (on-line resource). |
| 2 | Cultivated | Africa | Southern Africa | South Africa | | | PROTABASE, the information base of PROTA (Plant Resources of Tropical Africa) (on-line resource). |
| 2 | Cultivated | Africa | West-Central Tropical Africa | Democratic Republic of the Congo | | | PROTABASE, the information base of PROTA (Plant Resources of Tropical Africa) (on-line resource). |
| 2 | Cultivated | Africa | Western Indian Ocean | Reunion | | | Bosser, J. M. et al., eds. 1976-. Flores des Mascareignes. |
| 2 | Cultivated | Asia-Temperate | China | China | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Temperate | Eastern Asia | Japan | | | Iwatsuki, K. et al. 1993-. Flora of Japan. |
| 2 | Cultivated | Asia-Temperate | Eastern Asia | Korea | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Temperate | Middle Asia | Kazakhstan | | n. | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Asia-Temperate | Mongolia | Mongolia | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Temperate | Russian Far East | Russian Federation-Far East | Far East | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Asia-Temperate | Siberia | Russian Federation-Eastern Siberia | Eastern Siberia | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Asia-Temperate | Siberia | Russian Federation-Western Siberia | Western Siberia | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Asia-Tropical | Indian Subcontinent | Bhutan | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Tropical | Indian Subcontinent | India | | | Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6 |
| 2 | Cultivated | Asia-Tropical | Indian Subcontinent | Nepal | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Tropical | Indian Subcontinent | Pakistan | | | Nasir, E. & S. I. Ali, eds. 1970-. Flora of [West] Pakistan. |
| 2 | Cultivated | Asia-Tropical | Indo-China | Myanmar | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Asia-Tropical | Indo-China | Thailand | | n. | Grubben, G. J. H. & Soetjipto Partohardjono, eds. 1996. Cereals. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 10:95-99. |
| 2 | Cultivated | Asia-Tropical | Indo-China | Vietnam | | n. | Grubben, G. J. H. & Soetjipto Partohardjono, eds. 1996. Cereals. In: Faridah Hanum, I. & L. J. G. van der Maesen, eds., Plant Resources of South-East Asia (PROSEA) 10:95-99. |
| 2 | Cultivated | Australasia | Australia | Australia | | | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 2 | Cultivated | Australasia | New Zealand | New Zealand | | | Allan, H. H. B. et al. 1961-. Flora of New Zealand. |
| 2 | Cultivated | Europe | Eastern Europe | Belarus | | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Europe | Eastern Europe | Latvia | | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Europe | Eastern Europe | Lithuania | | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Europe | Eastern Europe | Russian Federation-European part | European part | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Europe | Eastern Europe | Ukraine | | | Afonin, A. N., S. L. Greene, N. I. Dzyubenko, & A. N. Frolov, eds. Interactive agricultural ecological atlas of Russia and neighboring countries. Economic plants and their diseases, pests and weeds (on-line resource). |
| 2 | Cultivated | Europe | Middle Europe | Poland | | | FNA Editorial Committee. 1993-. Flora of North America. |
| 2 | Cultivated | Northern America | | Canada | | | Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6 |
| 2 | Cultivated | Northern America | | United States | | | Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6 |
| 2 | Cultivated | Southern America | Brazil | Brazil | | | PROTABASE, the information base of PROTA (Plant Resources of Tropical Africa) (on-line resource). |
| 2 | Cultivated | Southern America | Caribbean | Cuba | | | Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6 |
| 4 | Naturalized | Africa | East Tropical Africa | Kenya | | | Turrill, W. B. et al., eds. 1952-. Flora of tropical East Africa. |
| 4 | Naturalized | Africa | East Tropical Africa | Tanzania | | | Turrill, W. B. et al., eds. 1952-. Flora of tropical East Africa. |
| 4 | Naturalized | Africa | East Tropical Africa | Uganda | | | Turrill, W. B. et al., eds. 1952-. Flora of tropical East Africa. |
| 4 | Naturalized | Africa | Southern Africa | Botswana | | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Eastern Cape | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Free State | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Gauteng | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | KwaZulu-Natal | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Northern Cape | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Asia-Temperate | Eastern Asia | Japan | | | Iwatsuki, K. et al. 1993-. Flora of Japan. |
| 4 | Naturalized | Asia-Temperate | Siberia | Russian Federation-Eastern Siberia | Eastern Siberia | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 4 | Naturalized | Asia-Temperate | Siberia | Russian Federation-Western Siberia | Western Siberia | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 4 | Naturalized | Asia-Tropical | Indian Subcontinent | Pakistan | | | Nasir, E. & S. I. Ali, eds. 1970-. Flora of [West] Pakistan. |
| 4 | Naturalized | Australasia | Australia | Australia | New South Wales | | Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11. |
| 4 | Naturalized | Australasia | Australia | Australia | Queensland | | Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11. |
| 4 | Naturalized | Australasia | New Zealand | New Zealand | | | Allan, H. H. B. et al. 1961-. Flora of New Zealand. |
| 4 | Naturalized | Europe | Eastern Europe | Russian Federation-European part | European part | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Europe | Middle Europe | Austria | | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Europe | Middle Europe | Germany | | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Europe | Northern Europe | Denmark | | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Europe | Northern Europe | Sweden | | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Europe | Southeastern Europe | Bulgaria | | | Jalas, J. & J. Suominen. 1972-. Atlas florae europaeae. |
| 4 | Naturalized | Northern America | Eastern Canada | Canada | Newfoundland and Labrador | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Eastern Canada | Canada | Nova Scotia | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Eastern Canada | Canada | Ontario | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Eastern Canada | Canada | Prince Edward Island | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Eastern Canada | Canada | Québec | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Illinois | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Iowa | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Kansas | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Minnesota | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Missouri | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Nebraska | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | North Dakota | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Oklahoma | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | South Dakota | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | North-Central U.S.A. | United States | Wisconsin | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Connecticut | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Indiana | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Maine | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Massachusetts | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Michigan | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | New Hampshire | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | New Jersey | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | New York | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Ohio | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Pennsylvania | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Rhode Island | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Vermont | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | West Virginia | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Colorado | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Montana | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Oregon | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Washington | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Wyoming | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | South-Central U.S.A. | United States | New Mexico | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | South-Central U.S.A. | United States | Texas | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Alabama | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Delaware | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | District of Columbia | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Florida | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Georgia | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Kentucky | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Louisiana | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Maryland | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | North Carolina | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | South Carolina | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Tennessee | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southeastern U.S.A. | United States | Virginia | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southwestern U.S.A. | United States | Arizona | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Southwestern U.S.A. | United States | California | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Subarctic America | Canada | Yukon | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Subarctic America | United States | Alaska | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Western Canada | Canada | Alberta | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Western Canada | Canada | Manitoba | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Western Canada | Canada | Saskatchewan | | FNA Editorial Committee. 1993-. Flora of North America. |