Ptychostomum

Ptychostomum is a genus of mosses belonging to the family Bryaceae. It has an almost cosmopolitan distribution. It has two subgenera, Psychostomum (Ptychostomum) and Psychostomum (Cladodium).

==Species== The following species are recognised in the genus Ptychostomum: Ptychostomum acutiforme Ptychostomum altisetum Ptychostomum amblyodon Ptychostomum angustifolium Ptychostomum archangelicum Ptychostomum arcticum Ptychostomum austriacum Ptychostomum badium Ptychostomum bimum Ptychostomum bornholmense Ptychostomum bryoides Ptychostomum calophyllum Ptychostomum cellulare Ptychostomum cernuum Ptychostomum chorizodontum Ptychostomum compactum Ptychostomum creberrimum Ptychostomum cryophilum Ptychostomum cyclophyllum Ptychostomum cylindrothecium Ptychostomum dicarpum Ptychostomum donianum Ptychostomum elegans Ptychostomum funkii Ptychostomum hawaiicum Ptychostomum imbricatulum Ptychostomum inclinatum Ptychostomum intermedium Ptychostomum knowltonii Ptychostomum lamprochaete Ptychostomum lonchocaulon Ptychostomum longisetum Ptychostomum marratii Ptychostomum meesioides Ptychostomum minii Ptychostomum moravicum Ptychostomum neodamense Ptychostomum nitidulum Ptychostomum ovatum Ptychostomum pacificum Ptychostomum pallens Ptychostomum pallescens Ptychostomum pauperculum Ptychostomum pendulum Ptychostomum pseudotriquetrum Ptychostomum reedii Ptychostomum rubens Ptychostomum rutilans Ptychostomum salinum Ptychostomum schleicheri Ptychostomum sibiricum Ptychostomum subneodamense Ptychostomum torquescens Ptychostomum touwii Ptychostomum turbinatum Ptychostomum vermigerum Ptychostomum vernicosum Ptychostomum warneum Ptychostomum weigelii Ptychostomum wrightii