homotypic synonyms:
Pleione rigida species (E.C.Parish & Rchb.f.) Kuntze;
protologue: Trans. Linn. Soc. London 30: 146 (1874)
2 262032 Coelogyne rigida E.C.Parish & Rchb.f.
G. Seidenfaden, Orchid Genera Thailand, vol. 3 : , fig. 30 ()
Pleione rigida species (E.C.Parish & Rchb.f.) Kuntze;
protologue: Trans. Linn. Soc. London 30: 146 (1874)
2 262032 Coelogyne rigida E.C.Parish & Rchb.f.G. Seidenfaden, Orchid Genera Thailand, vol. 3 : , fig. 30 ()