Saccolabium Vanda Sander Sa.
 
Sarcanthopsis Phalaenopsis Sarcalaenopsis Sar.
 
Sarcanthus Aerides, Ascocentrum Silpaprasertara Silpa.
  Aerides, Rhynchostylis Saridestylis Srdts.
 
Sarcochilus Aerides Aeridochilus Aerchs.
  Ascocentrum Sarcocentrum Srctm.
  Ascocentrum, Rhynchostylis, Vanda Leaneyara Lnya.
  Doritis, Phalaenopsis Sladeara Slad.
  Drymoanthus Sarcomoanthus Sran.
  Drymoanthus, Plectorrhiza Malcolmcampbellara Mcba.
  Gastrochilus Gastrosarcochilus Gsarco.
  Luisia Luichilus Luic.
  Papilionanthe, Vanda Sarcopapilionanda Sla.
  Parasarcochilus Parachilus Prcls.
  Parasarcochilus, Plectorrhiza Sarpariza Spza.
  Peristeranthus Peristerchilus Prschs.
  Phalaenopsis Sarconopsis Srnps.
  Phalaenopsis, Rhynchostylis Uptonara Upta.
  Plectorrhiza Plectochilus Plchs.
  Pomatocalpa Pomatochilus Pmtls.
  Pteroceras Sarcoceras Scs.
  Renanthera Sarcothera Srth.
  Rhinerrhiza Rhinochilus Rhincs.
  Rhynchostylis Sartylis Srts.
  Rhynchostylis, Vanda Porterara Prta.
  Vanda Sarcovanda Srv.
 
Sarcoglottis Stenorrhynchos Stenosarcos Stsc.
 
Scaphyglottis Epidendrum Epiglottis Epgl.
 
Scelochilus Comparettia Scelorettia Slt.
  Oncidium Scelodium Scd.
 
Schomburgkia Bletia Schombletia Sb.
  Brassavola Schombavola Smbv.
  Brassavola, Broughtonia, Cattleya, Cattleyopsis, Diacrium, Epidendrum, Laelia, Sophronitis Salleyyeeara Sya.
  Brassavola, Broughtonia, Cattleya, Epidendrum, Laelia, Sophronitis Yeeara Yra.
  Brassavola, Broughtonia, Cattleya, Laelia Westara Wsta.
  Brassavola, Broughtonia, Cattleya, Laelia, Sophronitis Mooreara Mora.
  Brassavola, Cattleya Dekensara Dek.
  Brassavola, Cattleya, Caularthron, Laelia Umlandara Uml.
  Brassavola, Cattleya, Epidendrum Symmonsara Syma.
  Brassavola, Cattleya, Epidendrum, Laelia Yahiroara Yhra.
  Brassavola, Cattleya, Epidendrum, Laelia, Sophronitis Johnyeeara Jya.
  Brassavola, Cattleya, Laelia Recchara Recc.
  Brassavola, Cattleya, Laelia, Sophronitis Fergusonara Ferg.
  Brassavola, Laelia Maclemoreara Mclmra.
  Broughtonia Schombonia Smbna.
  Broughtonia, Cattleya Schombocatonia Smbcna.
  Broughtonia, Cattleya, Epidendrum Wilburchangara Wbchg.
  Broughtonia, Cattleya, Epidendrum, Laelia Fredschechterara Fre.
  Broughtonia, Diacrium Shipmanara Shipm.
  Broughtonia, Laeliopsis Hildaara Hdra.
  Cattleya Schombocattleya Smbc.
  Cattleya, Diacrium Mizutara Miz.
  Cattleya, Diacrium, Laelia Mailamaira Mai.
  Cattleya, Epidendrum Scullyara Scu.
  Cattleya, Epidendrum, Laelia Northenara Nrna.
  Cattleya, Epidendrum, Laelia, Sophronitis Izumiara Izma.
  Cattleya, Laelia Schombolaeliocattleya Scl.
  Cattleya, Laelia, Sophronitis Herbertara Hbtr.
  Diacrium Schombodiacrium Smbdcm.
  Diacrium, Laelia Klehmara Klma.
  Encyclia Schombocyclia Sby.
  Epidendrium Schomboepidendrium Smbep.
  Epidendrum, Laelia Dillonara Dill.
  Guarianthe Guariburgkia Gbk.
  Laelia Schombolaelia Smbl.
  Laelia, Sophronitis Deiselara Dsla.
  Laeliopsis Schombolaeliopsis Smlp.
  Rhyncholaelia Rhynburgkia Rbg.
  Sophronitis Schombonitis Smbts.
 
Sedirea Arachnis, Phalaenopsis Arachnopsirea Aps.
  Doritis Doredirea Drd.
  Holcoglossum Holcodirea Hld.
  Hygrochilus Hygrodirea Hgd.
  Luisia Sedirisia Sdr.
  Luisia, Trichocentrum Luisedda Lda.
  Neofinetia Neosedirea Nsd.
  Neofinetia, Vanda Neosedanda Ndd.
  Phalaenopsis Sediropsis Sdp.
  Rhynchostylis Rhynchodirea Ryd.
  Rhynchostylis, Vanda Rhyndeiranda Rdn.
  Rhynchostylis, Vandopsis Rhynopsirea Rns.
  Vanda Vandirea Vnd.
  Vandopsis Vandopirea Vdp.
 
Seidenfadenia Aerides Seidenides Sdn.
  Arachnis Arachnadenia Ara.
  Ascocentrum Ascodenia As.
  Ascocentrum, Rhynchostylis, Vanda Lowsutongara Lwt.
  Ascocentrum, Vanda Ascofadanda Afd.
  Euanthe, Rhynchostylis, Vanda Thaiara Th.
  Neofinetia Neofadenia Nfd.
  Neofinetia, Rhynchostylis, Vanda Jisooara Jsr.
  Neofinetia, Vanda (Replaces Fadenfinanda) Neofadanda Ndn.
  Rhynchostylis Rhynchodenia Rcn.
  Rhynchostylis, Vanda (Replaces Fadenchoda) Rhynchofadanda Rfd.
  Vanda Seidenanda Snn.
 
Selenipedium Cypripedium Selenocypripedium Scp.
 
Serapias Anacamptis Serapicamptis Ser.
  Dactylorhiza Serapirhiza Sz.
  Orchis Orchiserapias Orsps.
 
Sigmatostalix Cischweinfia Cischostalix Cstx.
  Lockhartia Lockostalix Lkstx.
  Oncidium Sigmacidium Sgdm.
 
Simpliglottis Chiloglottis Chilosimpliglottis Csg.
 
Sobennikoffia Angraecum Sobennigraecum Sbgcm.
 
Sobralia Cattleya Sobraleya So.
 
Sophronitella Isabelia Isanitella Is.
 
Sophronitis Barkeria Barkonitis Bknts.
  Barkeria, Brassavola, Cattleya, Epidendrum, Laelia Trisuloara Tsla.
  Barkeria, Cattleya, Laelia Matsudaara Msda.
  Barkeria, Laelia Staalara Staal.
  Brassavola Brassophronitis Bnts.
  Brassavola, Broughtonia, Cattleya, Cattleyopsis, Diacrium, Epidendrum, Laelia, Schomburgkia Salleyyeeara Sya.
  Brassavola, Broughtonia, Cattleya, Epidendrum, Laelia Vacherotara Vach.
  Brassavola, Broughtonia, Cattleya, Epidendrum, Laelia, Schomburgkia Yeeara Yra.
  Brassavola, Broughtonia, Cattleya, Laelia Hasegawaara Hasgw.
  Brassavola, Broughtonia, Cattleya, Laelia, Schomburgkia Mooreara Mora.
  Brassavola, Cattleya Rolfeara Rolf.
  Brassavola, Cattleya, Diacrium, Laelia Clarkeara Clka.
  Brassavola, Cattleya, Epidendrum, Laelia Rothara Roth.
  Brassavola, Cattleya, Epidendrum, Laelia, Schomburgkia Johnyeeara Jya.
  Brassavola, Cattleya, Laelia Potinara Pot.
  Brassavola, Cattleya, Laelia, Schomburgkia Fergusonara Ferg.
  Brassavola, Epidendrum Epibrassonitis Epbns.
  Brassavola, Epidendrum, Laelia Panczakara Pzka.
  Brassavola, Guarianthe Brassophranthe Bsp.
  Brassavola, Laelia Lowara Low.
  Broughtonia Stonia Sto.
  Broughtonia, Cattleya Bishopara Bish.
  Broughtonia, Cattleya, Epidendrum, Laelia Buiara Bui.
  Broughtonia, Cattleya, Laelia Hawkinsara Hknsa.
  Broughtonia, Laelia Hartara Hart.
  Cattleya Sophrocattleya Sc.
  Cattleya, Diacrium, Laelia Higashiara Hgsh.
  Cattleya, Epidendrum Stacyara Stac.
  Cattleya, Epidendrum, Laelia Kirchara Kir.
  Cattleya, Epidendrum, Laelia, Schomburgkia Izumiara Izma.
  Cattleya, Guarianthe Guarisophleya Gsl.
  Cattleya, Laelia Sophrolaeliocattleya Slc.
  Cattleya, Laelia, Schomburgkia Herbertara Hbtr.
  Caularthron Sopharthron Sot.
  Caularthron, Laelia Calaeonitis Can.
  Constantia Conphronitis Conph.
  Diacrium, Laelia Severinara Sev.
  Encyclia Sophrocyclia Scy.
  Epidendrum Epiphronitis Ephs.
  Epidendrum, Laelia Stanfieldara Stdra.
  Guarianthe Sophranthe Srt.
  Guarianthe, Rhyncholaelia Rhynitanthe Rtt.
  Laelia Sophrolaelia Sl.
  Laelia, Schomburgkia Deiselara Dsla.
  Leptotes Sophrotes Spt.
  Rhyncholaelia Rhynitis Rhn.
  Schomburgkia Schombonitis Smbts.
 
Spathoglottis Bletia Bletiaglottis Blgts.
  Phaius Spathophaius Spp.
 
Stanhopea Cirrhaea Cirrhopea Chpa.
  Coryanthes Coryhopea Crhpa.
  Gongora Stangora Stga.
  Polycycnis Stanhocycnis Stncn.
 
Staurochilus Armodorum Armochilus Arl.
 

Stauropsis
(= Trichoglottis)

 Arachnis (see Arachnoglottis) Staurachnis Sta.
  Vanda (see Trichovanda) Stauranda Sr.
 
Stellilabium Telipogon Stellipogon Stp.
 
Stenia Chaubardiella Steniella Stla.
  Cochleanthes Cochlenia Cclna.
  Cochleanthes, Zygopetalum Phillipsara Phill.
  Kefersteinia Ackersteinia Aks.
  Pescatoria Pescenia Pesc.
 
Stenorrhynchos Cyclopogon Stenopogon Spg.
  Sarcoglottis Stenosarcos Stsc.
 
Symphyglossum Cochlioda, Odontoglossum Symphodontioda Sym.
  Miltonia Symphyglossonia Syg.
  Miltonia, Odontoglossum Symphodontonia Sda.
  Odontoglossum Symphodontoglossum Symp.