RUGULOSA Peck, Annual Rep. New York State Mus. 54: 154, pl. 72, figs. 12-18. 1901.
SERICELLA Murrill, Lloydia 7: 313. 1944.
SERICEONITENS Kauffman, Rep. Michigan Acad. Sci. 11: 84. 1909.
SERISSIMA Peck, New York State Mus. Bull. 139: 44. 1910.
SILVICOLA Shaffer, Beih. Nova Hedwidgia 51: 229, pl. 52, figs. 13-14, pl. 53, figs. 15-18. 1975.
SIMILLIMA (SIMILLIMUS) Peck, Annual Rep. New York State Mus. 24: 75. 1872.
SIMULANS Burlingham, Mycologia 13: 129, pl. 13, figs. 1-5, fig. 2. 1921.
SMITHII Singer, Bull. Soc. Mycol. France 54: 140. 1938.
SORDIDA Peck, Bull. Buffalo Soc. Nat. Sci. 1: 57. 1873.
SORORIICOLOR Singer in Singer et al., Beih. Nova Hedwidgia 77: 250, fig. 19. 1983.
SPHAGNOPHILA Kauffman, Rep. Michigan Acad. Sci. 11: 86. 1909.
SPHAGNOPHILA Kauffman var. AMERICANA Singer, Bull. Soc. Mycol. France 54: 149. 1938.
SQUALIDA Peck, New York State Mus. Bull. 116: 80. 1907.
STRICTA Murrill, Mycologia 4: 166, pl. 68, fig. 6. 1912.
STUNTZII Grund, Mycotaxon 9: 97. figs. 2, 6-8. 1979.
SUBACRIS Murrill, Bull. Torrey Bot. Club 67: 279. 1940.
SUBADUSTA Burlingham, N. Am. Fl. 9: 207. 1915.
SUBALBIDULA Murrill, Mycologia 33: 441. 1941.
SUBALPINA Miller, First International Symposium on Arcto-Alpine Mycology p. 136, figs. 6, 14-16. 1980.
SUBALUTACEA Burlingham, N. Am. Fl. 9: 227. 1915.
SUBBRUNNEIPES Murrill, Quart. J. Florida Acad. Sci. 8: 182. 1945.
SUBCARNICOLOR Murrill, Lloydia 8: 270. 1945.
SUBCREMEICEPS Murrill, Lloydia 8: 270. 1945.
SUBCYANOXANTHA Murrill, Lloydia 6: 217. 1943.
SUBCYANOXANTHA form OLIVACEA Murrill, Lloydia 9: 324. 1946.