Romanoa tamnoides is a species of plant of the family Euphorbiaceae. It is the sole species in the monotypic genus Romanoa, first described in 1824.Jussieu, Adrien Henri Laurent de. 1824. De Euphorbiacearum Generibus Medicisque earumdem viribus tentamen, tabulis aeneis 18 illustratum 46Trevisan de Saint-Léon, Vittore Benedetto Antonio. 1848. Saggio di una Monografia delle Alghe Coccotalle 99Tropicos, genus Romanoa It is native to Brazil and Paraguay.Kew World Checklist of Selected Plant FamiliesGovaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.Forzza, R. C. 2010. Lista de espécies Flora do Brasil http://floradobrasil.jbrj.gov.br/2010. Jardim Botânico do Rio de Janeiro, Rio de Janeiro
Varieties Romanoa tamnoides var. sinuata (Ule) Radcl.-Sm. - Bahia Romanoa tamnoides var. tamnoides - Paraguay, SE Brazil (Minas Gerais, Goiás, Rio de Janeiro)
The genus name Romanoa is also used for a fungus.
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