Bia is a genus of plant of the family Euphorbiaceae first described as a genus in 1841.Klotzsch, Johann Friedrich. 1841. Archiv für Naturgeschichte 7(1): 189-190 in Latin with notes in GermanTropicos, Bia Klotzsch The entire genus is native to South America.Kew World Checklist of Selected Plant FamiliesMedeiros, D., de Senna Valle, L. & Valka Alves, J.V. (2013). Revalidation of the genera Bia and Zuckertia (Euphorbiaceae) with B. capivarensis sp. nov. from Serra da Capivara, Brazil. Nordic Journal of Botany 31: 595-602.
Species Bia alienata Didr. - Brazil, Bolivia, Paraguay, N Argentina Bia capivarensis Medeiros & Alves - Serra da Capivara Bia fallax (Müll.Arg.) G.L.Webster - Peru, Rondônia Bia fendleri (Müll.Arg.) G.L.Webster - Guyana, Venezuela, Amazonas State of Brazil Bia lessertiana Baill. - Fr Guiana, Suriname, Guyana, N Brazil Bia manuelii V.W. Steinm. & Ram.-Amezcua, 2013, Sierra de Coalcomán, Michoacán, MexicoBia manuelii (Euphorbiaceae: Acalyphoideae), a new species from Sierra de Coalcomán, Michoacán, Mexico
formerly included moved to Zuckertia Bia cordata - Zuckertia cordata
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