| 
                                    Xanthidium armatum
                                 | 
                                F. S. Collins s.n. | 
                                04 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. in small pond… | 
                                — | 
                                 | 
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                                | 
                                    Xanthidium cristatum
                                 | 
                                C. Bullard s.n. | 
                                14 Jun 1908 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. near Hammond's Pond | 
                                — | 
                                 | 
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                                | 
                                    Staurastrum furcigerum f. eustephanum (Ralfs) Nordst.
                                 | 
                                C. Bullard s.n. | 
                                04 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. in a railway… | 
                                — | 
                                 | 
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                                | 
                                    Staurastrum muticum
                                 | 
                                C. Bullard s.n. | 
                                06 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. | 
                                — | 
                                 | 
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                                | 
                                    Staurastrum sebaldi Reinsch
                                 | 
                                C. Bullard s.n. | 
                                29 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. near Bay Shore,… | 
                                — | 
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                                | 
                                    Zygnema stellinum (O.F.Müll.) C.Agardh
                                 | 
                                F. D. Lambert s.n. | 
                                24 Apr 1909 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. brook in Middlesex… | 
                                — | 
                                 | 
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                                | 
                                    Spirogyra orthospira Naeg.
                                 | 
                                F. S. Collins s.n. | 
                                23 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. Lake Quannapowitt | 
                                — | 
                                 | 
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                                | 
                                    Spirogyra porticalis var. tenuispira Collins
                                 | 
                                F. S. Collins s.n. | 
                                13 Aug 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. Lower Pond | 
                                — | 
                                 | 
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                                | 
                                    Pediastrum duplex Meyen
                                 | 
                                F. S. Collins s.n. | 
                                06 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. pond near Bay… | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium boscii var. occidentale Hirn
                                 | 
                                F. S. Collins s.n. | 
                                07 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. in a swamp | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium echinospermum A.Braun ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                07 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. in a small… | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium echinospermum A.Braun ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                03 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. in a small… | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium pachyandrium Wittr. ex Hirn
                                 | 
                                C. Bullard s.n. | 
                                01 Jun 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium platygynum Wittr. ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                05 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. floating in a… | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium pseudoboscii Hirn
                                 | 
                                F. S. Collins s.n. | 
                                03 Apr 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. Middlesex Fells, in… | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium sexangulare A.Cleve ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                13 Aug 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. floating in Lower… | 
                                — | 
                                 | 
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                                | 
                                    Bulbochaete intermedia f. supramediana (Wittr.) Hirn
                                 | 
                                F. S. Collins s.n. | 
                                08 Jul 1907 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. in a pond | 
                                — | 
                                 | 
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                                | 
                                    Bulbochaete polyandria A.Cleve ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                05 Sep 1909 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. on Myriophyllum etc.,… | 
                                — | 
                                 | 
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                                | 
                                    Bulbochaete pygmaea Pringsh. ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                13 Aug 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. Lower Pond, on… | 
                                — | 
                                 | 
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                                | 
                                    Bulbochaete tenuis Hirn
                                 | 
                                F. S. Collins s.n. | 
                                09 Sep 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. forming a scum… | 
                                — | 
                                 | 
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                                | 
                                    Draparnaldia platyzonata Hazen
                                 | 
                                F. S. Collins s.n. | 
                                11 May 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. on stones at… | 
                                — | 
                                 | 
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                                | 
                                    Trentepohlia abietina (Flot.) Hansg.
                                 | 
                                N. L. Gardner s.n. | 
                                20 Jan 1910 | 
                                United States of America | 
                                California | 
                                San Francisco Co. growing on… | 
                                — | 
                                 | 
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                                | 
                                    Sphacelaria plumula var. californica Sauv.
                                 | 
                                N. L. Gardner s.n. | 
                                Feb 1907 | 
                                United States of America | 
                                California | 
                                Los Angeles Co. middle of… | 
                                — | 
                                 | 
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                                | 
                                    Ectocarpus cylindricus D.A.Saunders
                                 | 
                                N. L. Gardner s.n. | 
                                Dec 1908 | 
                                United States of America | 
                                California | 
                                Los Angeles Co. west of… | 
                                — | 
                                 | 
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                                | 
                                    Acrochaetium flexuosum Vickers
                                 | 
                                S. R. Morse s.n. | 
                                16 Apr 1892 | 
                                United States of America | 
                                New Jersey | 
                                Atlantic Co. | 
                                — | 
                                 | 
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                                | 
                                    Rhodomela larix (W.B.Turner) C.Agardh
                                 | 
                                J. Macoun s.n. | 
                                s.d. | 
                                Canada | 
                                British Columbia | 
                                Vancouver Island | 
                                — | 
                                 | 
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                                | 
                                    Oedogonium flavescens Wittr. ex Hirn
                                 | 
                                F. S. Collins s.n. | 
                                s.d. | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. in a small… | 
                                — | 
                                 | 
                                 | 
                                
                                                                      
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                                | 
                                    Gloiosiphonia capillaris (Huds.) Carmich.
                                 | 
                                W. C. Simmons s.n. | 
                                s.d. | 
                                United States of America | 
                                Rhode Island | 
                                Newport Co. | 
                                — | 
                                 | 
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                                | 
                                    Spirogyra porticalis var. tenuispira Collins
                                 | 
                                F. S. Collins s.n. | 
                                18 Jul 1909 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. floating in Lake… | 
                                type | 
                                 | 
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                                | 
                                    Oedogonium decipiens f. majus Collins
                                 | 
                                F. S. Collins s.n. | 
                                06 Jul 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. in a small… | 
                                type | 
                                 | 
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                                | 
                                    Bulbochaete nordstedtii f. suberecta Collins
                                 | 
                                C. Bullard s.n. | 
                                01 Jun 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Middlesex Co. in a pond | 
                                type | 
                                 | 
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                                | 
                                    Cladophora erecta Collins
                                 | 
                                N. L. Gardner s.n. | 
                                Dec 1909 | 
                                United States of America | 
                                California | 
                                Monterey Co. growing on overhanging… | 
                                — | 
                                 | 
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                                | 
                                    Merismopedia glauca f. mediterranea (Naeg.) Collins
                                 | 
                                N. L. Gardner s.n. | 
                                15 Nov 1905 | 
                                United States of America | 
                                California | 
                                San Francisco Co. Lake Merced,… | 
                                — | 
                                 | 
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                                | 
                                    Phormidium favosum (Bory) Gomont
                                 | 
                                F. S. Collins s.n. | 
                                11 Sep 1910 | 
                                United States of America | 
                                Massachusetts | 
                                Barnstable Co. shore of Salt… | 
                                — | 
                                 | 
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