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Haydenoxylon calzadae (Lundell) Biral
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Biral, L. 2021. A new combination and a new synonym in Haydenoxylon (Celastraceae). Novon 29: 74–76.
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Hammel, B. E., M. H. Grayum, C. Herrera Mora & N. Zamora. 2020-onward. Taxonomic and editorial changes made by the general editors to the on-line version of Manual de Plantas de Costa Rica. MPCR Vers. Internet
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Hammel, B. E. & J. P. T. Hedin. 2020. Celastraceae. En: Manual de Plantas de Costa Rica. Vol. IV, Parte 2. B.E. Hammel, M.H. Grayum, C. Herrera & N. Zamora (eds.). Monogr. Syst. Bot. Missouri Bot. Gard. 138: 409-451.
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