Dendrobium rhaphiotes Schltr., Repert. Spec. Nov. Regni Veg. 16 (1919) 115.
Type: Kempf s.n. (Kaiser Wilhelmsland, border between German- and English New Guinea) (holo B, lost).
Pedilonum rhaphiotes (Schltr.) Rauschert, Feddes Repert. 94 (1983) 463.
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Dendrobium geluanum Schltr., Repert. Spec. Nov. Regni Veg. 17 (1921) 374.
Type: Werner 76 (holo B, lost).
Pedilonum geluanum (Schltr.) Rauschert, Feddes Repert. 94 (1983) 459.
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Dendrobium cyananthum L.O.Williams, Bot. Mus. Leafl. 12 (1946) 156.
Type: Clemens 12089 b (AMES).
Pedilonum hellwigianum (Kraenzl.) Rauschert, Feddes Repert. 94 (1983) 460.