Plocoglottis porphyrophylla Ridl., Trans. Linn. Soc. London, Bot. 3 (1893) 368
Type: Ridley s.n. (Malay Peninsula, Pekan) (holo SING)
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Plocoglottis pubiflora Schltr. in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee (1905) 146
Type: Schlechter 14561 (holo B, lost)
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Plocoglottis atroviridis Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 403
Type: Schlechter 19270 (holo B, lost)
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Plocoglottis lowii Rchb.f. var. papuana J.J.Sm., Nova Guinea 12, 3 (1915) 197
Type: Gjellerup 1005 ['100'] (iso L)