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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                E. P. Walker 710 | 
                                11 Jun 1915 | 
                                United States of America | 
                                Alaska | 
                                Terminal moraine. Taku Inlet. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                S. L. Welsh 5071 | 
                                02 Aug 1965 | 
                                United States of America | 
                                Alaska | 
                                Grestle River Bridge, ca mile… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. P. Anderson 1579 | 
                                11 Jul 1922 | 
                                United States of America | 
                                Alaska | 
                                Fairbanks North Star Borough. Fairbanks. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. P. Anderson 745 | 
                                21 Aug 1918 | 
                                United States of America | 
                                Alaska | 
                                Haines Borough. Haines. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. P. Anderson 744 | 
                                03 Aug 1918 | 
                                United States of America | 
                                Alaska | 
                                Juneau Borough. Mendenhall [Glacier?], near… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                S. T. McDaniel 21798 | 
                                17 Jul 1978 | 
                                United States of America | 
                                Alaska | 
                                Yukon-Koyukuk Census Area. Circle, along… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. Macoun 76831 | 
                                26 Aug 1906 | 
                                Canada | 
                                Alberta | 
                                Edmondton. Along the line of… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                A. H. Brinkman 4017 | 
                                24 Aug 1928 | 
                                Canada | 
                                Alberta | 
                                Lesser Slave District. Howard Lake… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. M. Macoun 98051 | 
                                28 Jul 1917 | 
                                Canada | 
                                Alberta | 
                                Jasper Park. Along Athabaska River,… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                H. M. Raup 7108 | 
                                11 Sep 1935 | 
                                Canada | 
                                Alberta | 
                                Lake Athabaska. Vicinity of Fort… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. Macoun 76830 | 
                                24 Aug 1906 | 
                                Canada | 
                                Alberta | 
                                Edmonton. Along the line of… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                G. H. Turner 44 | 
                                June 20; Aug 6, 1936 | 
                                Canada | 
                                Alberta | 
                                River bank. Fort Saskatchewan. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                A. H. Brinkman 4323 | 
                                02 Jul 1929 | 
                                Canada | 
                                Alberta | 
                                Slave Lake District. Meadowland near… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                A. J. J. Breitung 15846 | 
                                12 Jul 1953 | 
                                Canada | 
                                Alberta | 
                                Waterton Lakes National Park. Belly… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                N. B. Sanson 62 | 
                                06 Jun 1924 | 
                                Canada | 
                                Alberta | 
                                Banff, Wind[ermer] Motor Road. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                J. M. Macoun s.n. | 
                                02 Aug 1917 | 
                                Canada | 
                                Alberta | 
                                Jasper Park. Along the lake.… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                A. H. Brinkman 3785 | 
                                31 Jul 1928 | 
                                Canada | 
                                Alberta | 
                                Nordegg District. Side of creek.… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                R. A. Darrow s.n. | 
                                06 Jun 1940 | 
                                United States of America | 
                                Arizona | 
                                Apache Co. | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                R. A. Darrow 1166 | 
                                04 Sep 1944 | 
                                United States of America | 
                                Arizona | 
                                Graham Co. Hospital Flats; Pinaleno… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                M. J. Demlong 55 | 
                                24 Jul 1989 | 
                                United States of America | 
                                Arizona | 
                                Apache Co. White Mountains, Horseshoe… | 
                                — | 
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                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                K. Waterbury 56 | 
                                21 Jul 2004 | 
                                United States of America | 
                                Arizona | 
                                Apache Co. Apache National Forest,… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                L. R. Landrum 9041 | 
                                10 Jun 1997 | 
                                United States of America | 
                                Arizona | 
                                Graham Co. Coronado Nat'l Forest;… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                C. L. Hitchcock 7628 | 
                                11 Jul 1941 | 
                                Canada | 
                                British Columbia | 
                                In bog, S end of… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                H. M. Raup 4582 | 
                                04 Sep 1932 | 
                                Canada | 
                                British Columbia | 
                                Lagoon margin. Sand Pt., N… | 
                                — | 
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                                | 
                                    Alnus incana subsp. tenuifolia (Nutt.) Breitung
                                 | 
                                H. M. Raup 3699 | 
                                27 Jun 1932 | 
                                Canada | 
                                British Columbia | 
                                In rich woods, ravine on… | 
                                — | 
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