Sarcochilus fitzgeraldii
Sarcochilus hartmannii

Sarcoglyphis mirabilis

Satyrium nepalense var ciliatum

Le genre Scaphosepalum

Scelochilus portillae

Schoenorchis gemmata

Schomburgkia lueddemanii
Schomburgkia superbiens
Schomburgkia undulata

Sedirea japonica

Sigmatostalix aristulifera
Sigmatostalix eliae

Solenidiopsis tigroides

Sophronitis brevipedunculata
Sophronitis cernua
Sophronitis cinnabarina
Sophronitis coccinea
Sophronitis dayana
Sophronitis gracilis
Sophronitis harpophylla
Sophronitis jongheana
Sophronitis kautskyi
Sophronitis pumila
Sophronitis sincorana

Stanhopea jenischiana
Stanhopea wardii

Le genre Stelis

Stenoglottis longifolia

Stenorrhynchos speciosum

Symphyglossum sanguineum : voir Odontoglossum sanguineum