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da Silva, O.L.M., Braun, P., Riina, R. and Cordeiro, I. 2021. Three new species of Euphorbia subgenus Chamaesyce (Euphorbiaceae) endemic to Brazil. European Journal of Taxonomy. 733, 1 (Feb. 2021), 72-86. DOI:https://doi.org/10.5852/ejt.2021.733.1223.