seidenfadenii A.D.Kerr (1973) Bulbophyllum semiasperum J.J.Sm. 1934 Bulbophyllum semiindutum J.J.Verm. & P.O'Byrne (2008) Bulbophyllum semiteres Schltr. 1913 Bulbophyllum semiteretifolium Gagnep. 1930 Bulbophyllum semperflorens J.J.Sm. 1907 Bulbophyllum sempiternum Ames 1920 Bulbophyllum senghasii G.A.Fisch. & Sieder (2009) Bulbophyllum sensile Ames 1915 Bulbophyllum sepikense W.Kittr. (1984 publ. 1985) Bulbophyllum septatum Schltr. 1924 Bulbophyllum septemtrionale (J.J.Sm.) J.J.Sm. 1913 Bulbophyllum serra Schltr. 1913: Toothed Bulbophyllum Bulbophyllum serratotruncatum Seidenf. (1973 publ. 1974) Bulbophyllum serripetalum Schltr. 1923 Bulbophyllum serrulatifolium J.J.Sm. 1929 Bulbophyllum serrulatum Schltr. in K.M.Schumann & C.A.G.Lauterbach 1905 Bulbophyllum setaceum T.P.Lin 1975: Bristly Bulbophyllum Bulbophyllum setigerum Lindl. 1838 Bulbophyllum setilabium Aver. (2017) Bulbophyllum setuliferum J.J.Verm. & Saw 2000 Bulbophyllum shanicum King & Pantl. 1897 Bulbophyllum shepherdii (F.Muell.) Rchb.f. 1871 – wheat-leaf rope orchid Bulbophyllum shweliense W.W.Sm. 1921 Bulbophyllum sibuyanense Ames 1912 Bulbophyllum sicyobulbon C.S.P.Parish & Rchb.f. 1874 Bulbophyllum siederi Garay 1999: Sieder's Bulbophyllum Bulbophyllum sigaldiae Guillaumin 1955 Bulbophyllum sigmoideum Ames & C.Schweinf. in O.Ames 1920 Bulbophyllum signatum J.J.Verm. 1996 Bulbophyllum sikapingense J.J.Sm. 1920 Bulbophyllum silentvalliensis M.P.Sharma & S.K.Srivast. 1993 Bulbophyllum sillemianum Rchb.f. 1884 Bulbophyllum simii J.J.Verm. & A.L.Lamb (2008) Bulbophyllum simile Schltr.1913 Bulbophyllum similissimum J.J.Verm. 1991 Bulbophyllum simmondsii Kores 1989 Bulbophyllum simondii Gagnep. 1950 Bulbophyllum simplex J.J.Verm. & P.O'Byrne 2003 Bulbophyllum simplicilabellum Seidenf. 1979 Bulbophyllum simulacrum Ames 1915 Bulbophyllum sinapis J.J.Verm. & P.O'Byrne 2003 Bulbophyllum singaporeanum Schltr. 1911 Bulbophyllum singulare Schltr. 1913 Bulbophyllum sinhoense Aver. (2007) Bulbophyllum skeatianum Ridl. 1915 Bulbophyllum smileiphyllum J.J.Verm., Schuit. & de Vogel (2014) Bulbophyllum smithianum Schltr. 1911 Bulbophyllum smitinandii Seidenf. & Thorut 1996 Bulbophyllum socordine J.J.Verm. & Cootes (2008) Bulbophyllum soidaoense (Seidenf.) J.J.Verm., Schuit. & de Vogel (2014) Bulbophyllum solteroi R.González 1992 Bulbophyllum somae Hayata (1920) Bulbophyllum sopoetanense Schltr. 1911: Mt. Sopoetan Bulbophyllum Bulbophyllum sordidum Lindl. 1840 Bulbophyllum sororculum J.J.Verm. 2002 Bulbophyllum spadiciflorum Tixier 1966 Bulbophyllum spaniostagon J.J.Verm., Schuit. & de Vogel (2014) Bulbophyllum spathilingue J.J.Sm. 1908 Bulbophyllum spathipetalum J.J.Sm. 1908 Bulbophyllum spathulatum (Rolfe ex E.Cooper) Seidenf. 1970 Bulbophyllum speciosum Schltr. 1912 Bulbophyllum sphaenopus J.J.Verm. (2008) Bulbophyllum sphaeracron Schltr. 1913 Bulbophyllum sphaericum Z.H.Tsi & H.Li 1981 Bulbophyllum sphaerobulbum H.Perrier 1937 Bulbophyllum spissum J.J.Verm. 1996 Bulbophyllum spodotriche J.J.Verm. & P.O'Byrne (2008) Bulbophyllum spongiola J.J.Verm. 1996 Bulbophyllum stabile J.J.Sm. 1911 Bulbophyllum staetophyton J.J.Verm. (2008) Bulbophyllum stalagmotelos J.J.Verm. (2008) Bulbophyllum stelis J.J.Sm. 1927 Bulbophyllum stellatum Ames 1912 Bulbophyllum stellula Ridl. 1916 Bulbophyllum stellulamontis J.J.Verm. & A.L.Lamb (2013) Bulbophyllum stemonochilum J.J.Verm. (2008) Bulbophyllum stenobulbon C.S.P.Parish & Rchb.f. 1874: Slender-bulbed Bulbophyllum Bulbophyllum stenochilum Schltr. 1913 Bulbophyllum stenomeris J.J.Verm. & P.O'Byrne (2008). Bulbophyllum stenophyllum C.S.P.Parish & Rchb.f.