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Alvarado-Cárdenas, L.O., García-Mendoza, A.J., Sandoval-Gutiérrez, D. and Lozada-Pérez, L. 2024. A new species of Polystemma (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobineae) from the state of Oaxaca, Mexico. Phytotaxa. 649, 1 (May 2024), 111–120. DOI:https://doi.org/10.11646/phytotaxa.649.1.7.