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Euphorbia sect. Goniostema Baill. ex Boiss.
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Dorsey, B. L., T. Haevermans, X. Aubriot, J. J. Morawetz, R. Riina, V. W. Steinmann & P. E. Berry. 2013. Phylogenetics. morphological evolution, and classification of Euphorbia subgenus Euphorbia. Taxon 62(2): 291–315.
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