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Maxillaria pendula (Poepp. & Endl.) C. Schweinf.
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Christenson, E. A. 2013. Maxillaria Monogr. 1–2: 1–936. Patricia Ann Harding, Lebanon, OR.
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Schuiteman, A. & M. W. Chase. 2015. A reappraisal of Maxillaria (Orchidaceae). Phytotaxa 225(1): 1–78.
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Ornithidium pendulum (Poepp. & Endl.) Cogn.
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Blanco, M. A., G. Carnevali Fernández-Concha, D. Bogarín & R. B. Singer. 2008. Further disentangling of a taxonomic puzzle: Maxillaria ramosa, Ornithidium pendulum, and a new species, O. elianae (Orchidaceae). Harvard Pap. Bot. 13(1): 137–154.
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