Gymnostomum

Gymnostomum is a genus of bryophyte in family Pottiaceae. It was first described by Christian Gottfried Daniel Nees von Esenbeck and Christian Friedrich Hornschuch

Species
The following species are recognised in the genus Gymnostomum:
 * Gymnostomum aeruginosum Smith, 1804
 * Gymnostomum angustatum C.Knight
 * Gymnostomum anoectangioides (Müll.Hal.) X.J.Li
 * Gymnostomum antarcticum Ångström
 * Gymnostomum apophysatum Taylor
 * Gymnostomum aquaticum (Hedw.) F.Weber & D.Mohr
 * Gymnostomum aurantiacum (Mitt.) A.Jaeger
 * Gymnostomum bescherellei Brotherus & Geheeb ex Herzog, 1910
 * Gymnostomum bewsii Sim, 1920
 * Gymnostomum boreale Nyholm & Hedenäs, 1986
 * Gymnostomum brevicaule Taylor
 * Gymnostomum brotherusii R.Br.bis
 * Gymnostomum calcareum Nees & Hornschuch, 1823 – calcareous gymnostomum moss
 * Gymnostomum capense (R.Br.) Hook.
 * Gymnostomum carthusianum Palisot de Beauvois, 1805
 * Gymnostomum chenii K.Saito, 1973
 * Gymnostomum ciliatum (Hedw.) Lag., D.García & Clemente
 * Gymnostomum cirrhatum De Not.
 * Gymnostomum complanatum Hook.f. & Wilson
 * Gymnostomum cucullatum (Müll.Hal.) A.Jaeger
 * Gymnostomum curvisetum Schwägr.
 * Gymnostomum cylindricum Hook. ex Harv.
 * Gymnostomum denticulatum Griff.
 * Gymnostomum dimorphum (Müll.Hal.) Sim
 * Gymnostomum eurystomum (Sendtn.) Lindb. & Arnell
 * Gymnostomum foliosum Röhling, 1810
 * Gymnostomum gracile (R.Br.) Hook.
 * Gymnostomum guadalupense Spreng.
 * Gymnostomum hymenostomoides Poech
 * Gymnostomum hymenostylioides Zander, 1993
 * Gymnostomum inclinans (R.Br.) Hook.
 * Gymnostomum inconspicuum Griff.
 * Gymnostomum jacksharpii B.H.Allen, 1990
 * Gymnostomum keniae P.de la Varde
 * Gymnostomum knightii Schimp.
 * Gymnostomum laeve Bryhn
 * Gymnostomum lamprocarpum Mont.
 * Gymnostomum lanceolatum Cano, Ros & J.Guerra, 1994
 * Gymnostomum latifolium Brid.
 * Gymnostomum laxirete (Broth.) P.C.Chen
 * Gymnostomum laxirete Chen Pan-chieh, 1941
 * Gymnostomum lessonii Bescherelle, 1891
 * Gymnostomum linearifolium Taylor
 * Gymnostomum lingulatum Rehman ex Sim, 1926
 * Gymnostomum longirostre Griff.
 * Gymnostomum ludovicae Brotherus & Paris, 1911
 * Gymnostomum madagascariense O'Shea
 * Gymnostomum menziesii (R.Br.) Hook.
 * Gymnostomum mosis Juratzka & Milde, 1870
 * Gymnostomum obtusifolium (Ehrh.) Rebent.
 * Gymnostomum orizabanum Schimp.
 * Gymnostomum pabstianum (Müll.Hal.) A.Jaeger
 * Gymnostomum paucifolium (With.) Sm.
 * Gymnostomum pottsii (Dixon) Sim
 * Gymnostomum prorepens Hedw.
 * Gymnostomum quadratum (Hook.) Hook.
 * Gymnostomum reflexum Brid.
 * Gymnostomum repandum Griff.
 * Gymnostomum scaturiginosum Besch.
 * Gymnostomum secundum (Müll.Hal.) A.Jaeger
 * Gymnostomum senocarpum (Müll.Hal.) A.Jaeger
 * Gymnostomum serratum Bréb.
 * Gymnostomum setifolium Hook. & Arn.
 * Gymnostomum simplicissimum Bridel, 1826
 * Gymnostomum spathulatum Harv.
 * Gymnostomum spirale Hartm.
 * Gymnostomum splachnobryoides Bizot, 1980
 * Gymnostomum stillicidiorum (Mitt.) A.Jaeger
 * Gymnostomum systylium Funck
 * Gymnostomum tenerrimum Wijk & Margadant, 1968
 * Gymnostomum truncatulum (With.) Hedw. ex Schumach.
 * Gymnostomum umbrosum (Mitt.) A.Jaeger
 * Gymnostomum unguiculatum Philibert, 1879
 * Gymnostomum uvidum Cardot
 * Gymnostomum valerianum (E.B.Bartram) R.H.Zander
 * Gymnostomum venezuelense (Müll.Hal.) Paris
 * Gymnostomum viridissimum (Dicks.) Sm.
 * Gymnostomum viridulum Bridel, 1826
 * Gymnostomum wageri Schelpe