| 
                                    Choaspis stictica (Sm.) Kuntze
                                 | 
                                D. Hone | J. E. Tilden s.n. | 
                                Nov 1908 | 
                                United States of America | 
                                Minnesota | 
                                Hennepin Co. Columbia Heights, City… | 
                                — | 
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                                | 
                                    Dysphinctium notabile (de Bary) Hansg.
                                 | 
                                J. E. Tilden s.n. | 
                                Jan 1906 | 
                                United States of America | 
                                Minnesota | 
                                University of Minnesota, in tank | 
                                — | 
                                 | 
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                                | 
                                    Cosmarium botrytis Menegh.
                                 | 
                                J. E. Tilden s.n. | 
                                Mar 1909 | 
                                United States of America | 
                                Minnesota | 
                                University of Minnesota, in tank | 
                                — | 
                                 | 
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                                | 
                                    Cladophora punaensis Tilden
                                 | 
                                J. E. Tilden s.n. | 
                                18 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                Puna | 
                                isotype | 
                                 | 
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                                | 
                                    Phormidium favosum (Bory) Gomont
                                 | 
                                M. G. Fanning 9 | 
                                1902 | 
                                United States of America | 
                                Texas | 
                                 | 
                                — | 
                                 | 
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                                | 
                                    Phormidium inundatum Kütz.
                                 | 
                                T. A. Williams | D. Griffiths 1 | 
                                01 Sep 1898 | 
                                United States of America | 
                                Montana | 
                                Yellowstone Co. on pottoms of… | 
                                — | 
                                 | 
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                                | 
                                    Microcoleus paludosus Gomont
                                 | 
                                J. E. Tilden s.n. | 
                                18 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                Puna, with other algae forming… | 
                                — | 
                                 | 
                                 | 
                                
                                                                      
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                                | 
                                    Nitella tenuissima (Desv.) Kütz.
                                 | 
                                N. L. Huff s.n. | 
                                s.d. | 
                                United States of America | 
                                Minnesota | 
                                Echo Lake, near St. Paul | 
                                — | 
                                 | 
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                                | 
                                    Tolypothrix tenuis Kütz.
                                 | 
                                J. E. Tilden s.n. | 
                                Mar 1909 | 
                                United States of America | 
                                Minnesota | 
                                University of Minnesota, Botanical Department,… | 
                                — | 
                                 | 
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                                | 
                                    Scytonema mirabile Bornet
                                 | 
                                J. E. Tilden s.n. | 
                                07 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                Waialuka River Falls, four miles… | 
                                — | 
                                 | 
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                                | 
                                    Scytonema azureum Tilden
                                 | 
                                J. E. Tilden s.n. | 
                                18 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                Puna, with other algae forming… | 
                                type | 
                                 | 
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                                | 
                                    Gloeocapsa arenaria (Hassall) Rabenh.
                                 | 
                                J. E. Tilden s.n. | 
                                Mar 1909 | 
                                United States of America | 
                                Minnesota | 
                                University of Minnesota, in tank | 
                                — | 
                                 | 
                                 | 
                                
                                                                      
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                                | 
                                    Phormidium crosbyanum Tilden
                                 | 
                                J. E. Tilden s.n. | 
                                21 May 1900 | 
                                United States of America | 
                                Hawaii | 
                                Oahu, Waianae, forming reddish-brown, flattened-globose… | 
                                isotype | 
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                                | 
                                    Oscillatoria amphibia C.Agardh
                                 | 
                                M. G. Fanning 19 | 
                                1902 | 
                                United States of America | 
                                Texas | 
                                 | 
                                — | 
                                 | 
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                                | 
                                    Scytonema crispum (C.Agardh) Bornet
                                 | 
                                J. E. Tilden s.n. | 
                                03 Aug 1908 | 
                                United States of America | 
                                Minnesota | 
                                Washington Co. Lily Lake, floating… | 
                                — | 
                                 | 
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                                | 
                                    Oscillatoria princeps Vaucher ex Gomont
                                 | 
                                C. F. Baker 4 | 
                                01 May 1896 | 
                                United States of America | 
                                Alabama | 
                                Lee Co. | 
                                — | 
                                 | 
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                                | 
                                    Microcoleus chthonoplastes Thur. ex Gomont
                                 | 
                                M. G. Fanning 13 | 
                                1902 | 
                                United States of America | 
                                Texas | 
                                 | 
                                — | 
                                 | 
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                                | 
                                    Phormidium retzii (C.Agardh) Kütz. ex Gomont
                                 | 
                                M. G. Fanning A | 
                                1902 | 
                                United States of America | 
                                Texas | 
                                 | 
                                — | 
                                 | 
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                                | 
                                    Phormidium retzii (C.Agardh) Kütz. ex Gomont
                                 | 
                                C. F. Baker 5 | 
                                24 Mar 1897 | 
                                United States of America | 
                                Alabama | 
                                Lee Co. | 
                                — | 
                                 | 
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                                | 
                                    Oscillatoria bonnemaisonii (P.Crouan & H.Crouan) P.Crouan & H.Crouan
                                 | 
                                J. E. Tilden s.n. | 
                                19 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                near Hilo, Seaconnot, floating in… | 
                                — | 
                                 | 
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                                | 
                                    Oscillatoria limosa C.Agardh ex Gomont
                                 | 
                                M. G. Fanning 16 | 
                                1902 | 
                                United States of America | 
                                Texas | 
                                 | 
                                — | 
                                 | 
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                                | 
                                    Nostoc spongiaeforme C.Agardh
                                 | 
                                J. E. Tilden s.n. | 
                                Sep 1908 | 
                                United States of America | 
                                Minnesota | 
                                University of Minnesota, Botanical Department,… | 
                                — | 
                                 | 
                                 | 
                                
                                                                      
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                                | 
                                    Hapalosiphon fontinalis (C.Agardh) Bornet
                                 | 
                                W. H. Lippold s.n. | 
                                29 Sep 1904 | 
                                United States of America | 
                                Minnesota | 
                                Hennepin Co. near Campus, on… | 
                                — | 
                                 | 
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                                | 
                                    Scytonema fuliginosum Tilden
                                 | 
                                J. E. Tilden s.n. | 
                                04 Jul 1900 | 
                                United States of America | 
                                Hawaii | 
                                Pahala Plantation beach, forming a… | 
                                isotype | 
                                 | 
                                 | 
                                
                                                                      
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                                 | 
                            
                       
                        
                            
                            
                                | 
                                    Sargassum bacciferum (W.B.Turner) C.Agardh
                                 | 
                                C. W. Hall s.n. | 
                                Feb 1909 | 
                                — | 
                                — | 
                                 | 
                                — | 
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