| Stereodon giganteus (Schimp.) Mitt.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Mitten, W. (1864). The “Bryologia” of the Survey of the 49th Parallel of Latitude. Journal of the Linnean Society, Botany, 8, 12–55. https://www.tropicos.org/reference/9004175 | 
                
                
                
                
            
                
                    | Hypnum giganteum var. immersum Warnst.
                        synoniem |  | 
                
                
                
                
            
                
                    | Hypnum giganteum var. fluitans H.Klinggr.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Klinggräff, H. E. M. v. (1893). In Die Leber- und Laubmoose West- und Ostpreussens. Wilhelm Engelmann. https://www.tropicos.org/reference/9019383 | 
                
                
                
                
            
                
                    | Hypnum giganteum var. fluitans (Rabenh.) Huebener ex Heugel
                        synoniem |  | 
                
                
                
                
            
                
                    | Hypnum giganteum var. fluitans (Rabenh.) Huebener
                        homotypic synonym |  | 
                
                
                
                
            
                
                    | Hypnum giganteum var. dendroides Limpr.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Limpricht, K. G. (1904). In Die Laubmoose Deutschlands, Oesterreichs und der Schweiz. Eduard Kummer. https://www.tropicos.org/reference/9028960 | 
                
                
                
                
            
                
                    | Hypnum giganteum var. cyclophyllotum (Holz.) R.S.Williams
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Williams, R. S. (1902). A preliminary list of Montana mosses. Bulletin of the New York Botanical Garden, 2, 351–380. https://www.tropicos.org/reference/9004785 | 
                
                
                
                
            
                
                    | Hypnum giganteum Schimp.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Schimper, W. P. (1860). In Synopsis Muscorum Europaeorum. E. Schweizerbart. https://www.tropicos.org/reference/9011513 | 
                
                
                
                
            
                
                    | Hypnum cyclophyllotum Holz.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Holzinger, J. M. (1896). A new Hypnum of the section Calliergon. Minnesota Botanical Studies, 1, 691–692. https://www.tropicos.org/reference/9003167 | 
                
                
                
                
            
                
                    | Hypnum cordifolium var. stenodictyon Schimp.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Schimper, W. P. (1854). Fasc. 57--61. Eurhynchium, Hypnum. In Bryologia Europaea. E. Schweizerbart. https://www.tropicos.org/reference/9031281 | 
                
                
                
                
            
                
                    | Hypnum cordifolium var. robustum H.Klinggr.
                        synoniem |  | 
                
                
                
                
            
                
                    | Hypnum cordifolium var. giganteum (Schimp.) Sanio
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Verh. Bot. Vereins Prov. Brandenburg, 24: 84, 84, 1882 | 
                
                
                
                
            
                
                    | Hypnum cordifolium var. fluitans Rabenh.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Deutschl. Krypt.-Fl., 2(3): 289, 289, 1848 | 
                
                
                
                
            
                
                    | Hypnum cordifolium var. fasciculatum De Not.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:De Notaris, G. (1838). In Syllabus Muscorum in Italia. Canfari. https://www.tropicos.org/reference/9015261 | 
                
                
                
                
            
                
                    | Calliergon subsarmentosum Kindb.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. tenuis Karczm.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. tenue Karczm.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Karczmarz, K. (1971). A monograph of the genus Calliergon (Sull.) Kindb. Monographiae Botanicae, 34, 209 pp + 20 pl. https://www.tropicos.org/reference/9003471 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. robustum Warnst.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Warnstorf, C. (1904). In Kryptogamenflora der Mark Brandenburg, Laubmoose. Gebrüder Borntraeger. https://www.tropicos.org/reference/9028868 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. pseudosarmentosum Latzel
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. pennatum Karczm.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Karczmarz, K. (1971). A monograph of the genus Calliergon (Sull.) Kindb. Monographiae Botanicae, 34, 209 pp + 20 pl. https://www.tropicos.org/reference/9003471 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. leptotum Zodda
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. laxifolium Warnst.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. immersum Ruthe ex Karczm.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum var. fluitans G.Roth
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Roth, G. (1903). In Die Europäischen Laubmoose. Wilhelm Engelmann. https://www.tropicos.org/reference/9028871 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. falcatum J.J.Amann
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Amann, J. J., & Meylan, C. (1918). In Flore des Mousses de la Suisse (Vol. 1). Herbier Bossier. https://www.tropicos.org/reference/9010656 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. dendroides (Limpr.) G.Roth
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Roth, G. (1903). In Die Europäischen Laubmoose. Wilhelm Engelmann. https://www.tropicos.org/reference/9028871 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. decurrens Mikut.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Bryoth. Balt., 208, 208, 1913 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. cyclophyllotum (Holz.) Grout
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Grout, A. J. (1928). In Moss Flora of North America (Vol. 3). Author. https://www.tropicos.org/reference/9009734 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. crassicostatum Mikut.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Bryoth. Balt., 207, 207, 1913 | 
                
                
                
                
            
                
                    | Calliergon giganteum var. brevifolium (Limpr.) Warnst.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:Warnstorf, C. (1904). In Kryptogamenflora der Mark Brandenburg, Laubmoose. Gebrüder Borntraeger. https://www.tropicos.org/reference/9028868 | 
                
                
                
                
            
                
                    | Calliergon giganteum f. robustum (Warnst.) C.E.O.Jensen
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. pseudosarmentosum (Latzel) Podp.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. immersum (Warnst.) Mönk.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. hystricosum (G.Roth & Bock) Podp.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. fontinaloides Mönk.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. falcatum (J.J.Amann) Podp.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. dendroides (Limpr.) Mönk.
                        synoniem |  | 
                
                
                
                
            
                
                    | Calliergon giganteum f. brevifolium (Limpr.) Mönk.
                        synoniem |  | 
                
                
                
                
            
                
                    | Amblystegium giganteum (Schimp.) De Not.
                        synoniem |  | 
                
                    
                        | Gepubliceerd in:De Notaris, G. (1867). Cronaca della briologia Italiana. Parte II. Commentario Della Società Crittogamologica Italiana, 2(3), 269–312. https://www.tropicos.org/reference/9029230 | 
                
                
                
                
            
                
                    | Acrocladium giganteum (Schimp.) P.W.Richards & E.C.Wallace
                        synoniem |  |