Renanthera ramuana – synonym of Rhinerrhizopsis moorei
Rhamphidia discoidea – synonym of Hetaeria oblongifolia
Rhamphidia gardneri – synonym of Hetaeria oblongifolia
Rhamphidia ovalifolia – synonym of Hetaeria oblongifolia
Rhamphidia rubicunda – synonym of Hetaeria oblongifolia
Rhamphidia tenuis – synonym of Hetaeria oblongifolia
Rhinerrhiza moorei – synonym of Rhinerrhizopsis moorei
Rhipidorchis micrantha – synonym of Phreatia micrantha
Rhomboda bantaengensis – synonym of Rhomboda lanceolata
Rhomboda luzonensis – synonym of Rhomboda lanceolata
Rhynchanthera paniculata – synonym of Corymborkis veratrifolia
Rhynchophreatia angustifolia – synonym of Thelasis angustifolia
Rhynchophreatia gautierensis – synonym of Thelasis gautierensis
Rhynchophreatia mamberamensis – synonym of Thelasis mamberamensis
Rhynchophreatia micrantha – synonym of Phreatia micrantha
Rhynchophreatia phreatioides – synonym of Thelasis phreatioides
Rhynchophreatia sphaerocarpa – synonym of Thelasis sphaerocarpa
Rhynchophreatia wariana – synonym of Thelasis wariana
Robiquetia mooreana – synonym of Robiquetia ascendens
Robiquetia squamulosa – synonym of Robiquetia gracilistipes
Robiquetia tierneyana – synonym of Robiquetia gracilistipes
Roptrostemon discolor – synonym of Nervilia plicata