Thurnia is a group of herbaceous plants described as a genus in 1883.Tropicos, Thurnia Hook. f.Hooker, Joseph Dalton. 1883. Hooker's Icones Plantarum v 15, plates 1407–1408 line drawings as illustrations, T. sphaerocephala on plate 1407, T. jenmanii on plate 1408Hooker, Joseph Dalton. 1883. Hooker's Icones Plantarum v 15, pages 5-7 descriptions in Latin, habitat information in English
Thurnia is native to northern South America.Kew World Checklist of Selected Plant FamiliesBerry, P.E., Yatskievych, K. & Holst, B.K. (eds.) (2005). Rutaceae-Zygophyllaceae. Flora of the Venenzuela Guayana 9: 1-608. Missouri Botanical Garden, St. Louis.Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
Species Thurnia jenmanii Hook.f. - Guyana Thurnia polycephala Schnee - SE Colombia, S Venezuela, N Brazil Thurnia sphaerocephala (Rudge) Hook.f. - Guyana, Suriname, French Guiana, Colombia, S Venezuela, N Brazil
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