Sarcanthus filiformis = Saccolabium filiforme
Saccolabium filiforme = Sarcanthus filiformis
Saccolabium flexuosum = Oeceoclades flexuosa
Saccolabium quisumbinngii
x Sakabaara hybrid (Brassavola x Broughtonia x Cattleya x Diacrium x Laelia)
Sarcochilus falcatus
Sarcochilus fitzgeraldii
Sarcochilus hartmannii
Satyrium anthersteris - Tanzania
Satyrium bicorne
Satyrium carneum
Satyrium coriifolium
Satyrium crassicaule - Tanzania
Satyrium erectum
Satyrium neilgherrensis - India (Tamil Nadu).
Satyrium pumilum
Satyrium sacculatum - Tanzania
Satyrium volkensii - Tanzania
Scaphosepalum antenniferum
Scaphosepalum breve
Scaphosepalum cloesii - Ecuador
Scaphosepalum gibberosum
Scaphosepalum globosum - Ecuador
Scaphosepalum grande
Scaphosepalum jostii - Ecuador
Scaphosepalum manningii - Venezuela
Scaphosepalum martineae - Peru
Scaphosepalum microdactylum
Scaphosepalum ovulare
Scaphosepalum panduratum - Colombia
Scaphosepalum rapax
Scaphosepalum verrucosum
Scaphyglottis amethystina
Schlimia alpina
Schlimia condorana
Schlimia garayana
Schlimia jasminodora
Schlimia stevensonii
Schlimia trifida
Schoenorchis densiflora
Schoenorchis gemmata
Schoenorchis manilaliana - India (Kerala)
Schoenorchis splendida
Schoenorchis superbiens
Schomburkia (by Phil) :
Schomburgkia tibicinis
Scuticaria hadwenii
Scuticaria steelei
Sedirea japonica
Seidenfadenia mitrata
Seidenfadeniella filiformis = Saccolabium filiforme.
x Senghasara hybrid (Ada x Gomesa x Odontoglossum)
Serapias carica - Greece.
Serapias cordigera
Sievekingia (Nina Rach) :
Sievekingia graminea
Sievekingia minax
Smitinandia micrantha
Sobennikoffia fournieriana
Sobennikoffia humbertiana
Sobennikoffia robusta
Sobralia (Delfina de Araujo) :
Sobralia (Nina Rach) :
Sobralia altissima - Peru.
Sobralia candida
Sobralia ciliata
Sobralia decora
Sobralia dichotoma (Peru)
Sobralia leucoxantha
Sobralia macrantha
Sobralia rosea
Sobralia violacea
Sophronitella violacea
Sophronitis cernua
Sophronitis coccinea
Sophronitis plicata
Sophronitis pubescens
Soterosanthus (Nina Rach) :
Spiculaea ciliata
Spiranthes aestivalis
Spiranthes cernua
Spiranthes romanzoffiana
Spiranthes sinensis
Spiranthes spiralis
Stanhopea (RJ Hartley, Foxdale orchids) :
Stanhopea (Jitzes Mud) :
Stanhopea (Nina Rach) :
Stanhopea culture (Dr. Dough Pulley) :
Stanhopeinae (the Subtribe -):
Stanhopea anfracta
Stanhopea annulata
Stanhopea candida
Stanhopea cirrhata
Stanhopea florida
Stanhopea grandiflora
Stanhopea graveolens
Stanhopea embrei
Stanhopea jenishiana
Stanhopea martiana
Stanhopea oculata
Stanhopea pulla
Stanhopea ruckeri
Stanhopea saccata
Stanhopea tigrina
Stanhopea Wardii
Stenocoryne vitellina
Stelis argentata
Stelis calceolaris
Stelis ciliaris
Stelis pallida
Stelis pardipes
Stellilabium aciculare - Panama, Costa Rica.
Stellilabium butcheri - Panama.
Stellilabium fortunae - Panama.
Stellilabium morii - Panama.
Stellilabium sect. Dipterostele = gen. Dipterostele.
Stellilabium sect. Rhamphostele
Stellilabium sect. Taeniorhachis
x Steniella hybrid (Chaubardiella x Stenia)
Stenoglottis cultivation
Stenoglottis fimbriata
Stenoglottis longifolia
Stenoglottis woodii
Stenoglottis zambesiaca
Stenorrtynchus lanceolatum
Stenorrtynchus speciosum
Stilifolium aguirrei - Colombia.
Stilifolium pongratzianum
x Susanperreiraara hybrid (Broughtonia x Cattleya x Tetramicra)
Symphyglossum sanguineum
Slipper Orchids (UK) (National collection, Geoffrey Hands):