Displaying 1 - 75 out of 144 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Acer spicatum Lam. | F. K. Butters 478 | 20 Jul 1932 | United States of America | Minnesota | 5 mi. N. of Grand… | — | 2490397 |
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| Acer spicatum Lam. | F. K. Butters s.n. | 31 May 1920 | United States of America | Minnesota | Wabasha Co. Bluffs of Mississippi,… | — | 2490398 |
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| Adiantum aleuticum (Rupr.) C.A.Paris | F. K. Butters a33474 | Aug 1906 - 08 Aug 1909 | Canada | British Columbia | Moraine of Dawson Glacier. Selkirk… | — | 3482857 |
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| Adiantum pedatum L. | F. K. Butters 487 | s.d. | Canada | British Columbia | Glacier | — | 3483775 |
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| Agrostis canina L. | F. K. Butters 689691 | 22 Jul 1911 | Canada | British Columbia | North M[orrain, Sir] Sandford El. | — | 1554528 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | F. K. Butters 37 | 07 Jul 1938 | United States of America | Minnesota | Cook Co. On top of… | — | 1555915 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | F. K. Butters 55 | 07 Jul 1938 | United States of America | Minnesota | Cook Co. Along base of… | — | 1555918 |
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| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | F. K. Butters 465 | 17 Jul 1932 | United States of America | Minnesota | Cook Co. S. of Clearwater… | — | 1556185 |
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| Alnus incana subsp. rugosa (Du Roi) R.T.Clausen | F. K. Butters 324a | 07 Jul 1937 | Canada | Ontario | Thunder Bay Distr. Island in… | — | 2471723 |
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| Alnus viridis subsp. crispa (Aiton) Turrill | F. K. Butters 665 | 01 Jul 1940 | United States of America | Minnesota | Cook Co. Steep slope at… | — | 2473116 |
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| Alnus viridis subsp. crispa (Aiton) Turrill | F. K. Butters 4486 | 30 Jun 1924 | United States of America | Minnesota | Near mouth of Carribean River… | — | 2473165 |
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| Alnus viridis subsp. crispa (Aiton) Turrill | F. K. Butters s.n. | 09 Sep 1918 | United States of America | Minnesota | Saint Louis Co. Rocky island,… | — | 2473166 |
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| Alnus viridis subsp. sinuata (Regel) Á.Löve & D.Löve | F. K. Butters 428 | 26 Jul 1908 | Canada | British Columbia | Selkirk Mountains. | — | 2475040 |
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| Antennaria howellii subsp. canadensis (Greene) R.J.Bayer | F. K. Butters 69 | June 20, 1936 | United States of America | Minnesota | Cook Co. Clearwater Lake. | — | 1890091 |
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| Antennaria howellii subsp. neodioica (Greene) R.J.Bayer | F. K. Butters 10811 | July 1, 1939 | United States of America | Minnesota | Cook Co. On North side… | — | 1890272 |
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| Antennaria howellii subsp. neodioica (Greene) R.J.Bayer | F. K. Butters 39 | July 7, 1938 | United States of America | Minnesota | Cook Co. Top of the… | — | 1890279 |
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| Arnica latifolia Bong. | F. K. Butters 233 | 27 Jul 1907 | Canada | British Columbia | Selkirk Mountains; Grizzly Creek, Prairie… | — | 1881909 |
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| Asplenium montanum Willd. | F. K. Butters 2030 | 24 Jan 1940 | United States of America | Connecticut | High Rock State Park | — | 3519120 |
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| Asplenium trichomanes L. | F. K. Butters 136 | 13 Jul 1938 | United States of America | Minnesota | Cook Co. East-facing cliff overlooking… | — | 3523069 |
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| Astragalus alpinus L. var. alpinus | F. K. Butters 1322 | 12 Jun 1906 | Canada | Alberta | Old road, Banff | — | 01215287 |
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| Astragalus australis (L.) Lam. | F. K. Butters 15 | 04 Jul 1907 | Canada | Alberta | Banff | — | 01244478 |
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| Astragalus miser var. serotinus (A.Gray ex Cooper) Barneby | F. K. Butters 12 | 04 Jul 1907 | Canada | Alberta | Banff | — | 01261862 |
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| Astragalus robbinsii var. minor (Hook.) Barneby | F. K. Butters 1384 | 11 Jun 1906 | Canada | Alberta | Banff. Candian Rocky Mountains | — | 01282386 |
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| Athyrium filix-femina subsp. angustum R.T.Clausen | F. K. Butters 3982 | 20 Jul 1920 | United States of America | Minnesota | Houston Co. Mayville Twp. | — | 3797551 |
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| Athyrium filix-femina subsp. angustum R.T.Clausen | F. K. Butters 448 | 16 Jul 1932 | United States of America | Minnesota | Cook Co. North of Clearwater… | — | 3797567 |
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| Betula glandulifera (Regel) B.T.Butler | F. K. Butters 2857 | 11 Jun 1915 | United States of America | Minnesota | Anoka Co. Moist depression in… | — | 2475755 |
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| Betula nigra L. x B. papyrifera Marshall | F. K. Butters 334 | 11 Jul 1916 | United States of America | New York | near New Albion | — | 02476609 |
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| Betula papyrifera Marshall | F. K. Butters 731 | Aug 1912 | Canada | British Columbia | — | 2477039 |
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| Betula papyrifera Marshall x B. cordifolia Regel | F. K. Butters 439 | 13 Jul 1937 | United States of America | Minnesota | Cook Co. Little Portage Bay,… | — | 02477823 |
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| Bromus ciliatus L. | F. K. Butters 870 | 02 Aug 1944 | United States of America | Minnesota | Cook Co. on Lima Mt. | — | 1634365 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | F. K. Butters 389 | 23 Jul 1908 | Canada | British Columbia | Glacier | — | 1645515 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | F. K. Butters 358 | 11 Jul 1937 | United States of America | Minnesota | Cook Co. South side of… | — | 1645879 |
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| Calamagrostis canadensis (Michx.) P.Beauv. | F. K. Butters 593 | 01 Aug 1910 | United States of America | Minnesota | Cougar Valley. | — | 1645882 |
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| Calamagrostis neglecta subsp. inexpansa (A.Gray) Tzvelev | F. K. Butters 312 | 04 Sep 1907 | Canada | — | Banff, [Atla]. | — | 1597314 |
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| Calamagrostis purpurascens R.Br. | F. K. Butters 108 | 11 Jul 1938 | United States of America | Minnesota | Cliff at west end of… | — | 1647167 |
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| Carex brunnescens (Pers.) Poir. | F. K. Butters 750 | 07 Jul 1940 | United States of America | Minnesota | Cook Co. Porcupine Island | — | 2252571 |
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| Carex canescens L. | F. K. Butters 4659 | 07 Jul 1924 | United States of America | Minnesota | Grand Marais. | — | 2253449 |
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| Carex canescens L. | F. K. Butters 18 | 05 Jul 1938 | United States of America | Minnesota | Cook Co. Shore on south… | — | 2253501 |
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| Carex capillaris L. | F. K. Butters 48 | 06 Jul 1907 | Canada | — | Devil's Lake, Banff Alta. | — | 2254016 |
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| Carex crawfordii Fernald | F. K. Butters 846 | 02 Aug 1944 | United States of America | Minnesota | Cook Co. Poplar Lake | — | 2260999 |
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| Carex cryptolepis Mack. | F. K. Butters 475 | 19 Jul 1932 | United States of America | Minnesota | Cook Co. S. end of… | — | 2261631 |
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| Carex deweyana Schwein. var. deweyana | F. K. Butters 671 | 01 Jul 1940 | United States of America | Minnesota | Cook Co. Cliff on west… | — | 2262546 |
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| Carex disperma Dewey | F. K. Butters 81 | 06 Jul 1907 | Canada | Alberta | Canadian Rocky Mountains. Hillsides, Banff. | — | 2263446 |
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| Carex gynocrates Wormsk. | F. K. Butters 249 | 26 Jul 1907 | Canada | British Columbia | Grizzly Creek, Prairies Hills | — | 2279225 |
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| Carex houghtonii Torr. | F. K. Butters 681 | 01 Jul 1940 | United States of America | Minnesota | Slate talus below cliff on… | — | 2191451 |
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| Carex intumescens Rudge | F. K. Butters 390 | 10 Jul 1932 | United States of America | Minnesota | Cook Co. Bank of Cross… | — | 2192548 |
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| Carex lanuginosa Michx. | F. K. Butters 328 | 07 Jul 1932 | United States of America | Minnesota | Cook Co. 30 mi. from… | — | 2194291 |
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| Carex leptalea Wahlenb. | F. K. Butters 179 | 20 Jul 1907 | Canada | — | Lake Louise Laygan Alata. | — | 2286958 |
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| Carex leptalea Wahlenb. | F. K. Butters 4557 | 03 Jul 1924 | United States of America | Minnesota | Cook Co. Pidgeon River. | — | 2287181 |
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| Carex leptonervia (Fernald) Fernald | F. K. Butters s.n. | 18 Jun 1936 | United States of America | Minnesota | Along wood road near mouth… | — | 2287441 |
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| Carex nardina (Hornem.) Fr. | F. K. Butters 140 | 15 Jul 1907 | Canada | Alberta | Paradise Valley, Laggan | — | 2292741 |
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| Carex nigricans C.A.Mey. | F. K. Butters 477 | 17 Aug 1909 | Canada | British Columbia | Columbia-Shuswap Reg. Distr. Kootenay. Glacier… | — | 2293008 |
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| Carex norvegica Retz. | F. K. Butters 4645 | 07 Jul 1924 | United States of America | Minnesota | Cook Co. | — | 2308952 |
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| Carex norvegica Retz. | F. K. Butters 82-1398 | 11 Jun 06 - 07 Jul 07 | Canada | Alberta | Banff. | — | 2309008 |
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| Carex paupercula Michx. | F. K. Butters 827 | 30 Jul 1944 | United States of America | Minnesota | Cook Co. Sphagnum bog near… | — | 2295113 |
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| Carex peckii Howe ex Peck | F. K. Butters 253 | 04 Jul 1937 | United States of America | Minnesota | Cook Co. Cliffs, S side… | — | 2295448 |
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| Carex rossii Boott | F. K. Butters 1 | 04 Jul 1907 | Canada | Alberta | Banff. | — | 2300537 |
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| Carex saltuensis L.H.Bailey | F. K. Butters 64 | 05 Jul 1907 | Canada | Alberta | Banff. Devil's Lake | — | 2301579 |
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| Carex viridula Michx. | F. K. Butters 1321 | 11 Jun 1906 | Canada | Alberta | Banff. Sulphur springs. | — | 2310063 |
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| Centaurea maculosa Lam. | F. K. Butters s.n. | 03 Oct 1918 | United States of America | Minnesota | Dakota Co. Pilot Mound | — | 581120 |
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| Corallorhiza maculata var. occidentalis (Lindl.) Ames | F. K. Butters 309 | 06 Jul 1937 | United States of America | Minnesota | Cook Co. At base of… | — | 4028016 |
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| Corallorhiza maculata var. occidentalis (Lindl.) Ames | F. K. Butters 15 | 05 Jul 1938 | United States of America | Minnesota | Cook Co. Watab Lake | — | 4028027 |
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| Cornus stolonifera Michx. | F. K. Butters 134 | 27 Jun 1936 | United States of America | Minnesota | Cook Co. Winchell Lake, back… | — | 2508927 |
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| Cornus stolonifera Michx. | F. K. Butters 13465 | 03 Sep 1940 | United States of America | Minnesota | Carlton Co. 3 Mi S… | — | 2509047 |
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| Corylus cornuta Marshall | F. K. Butters 311 | 07 Jul 1937 | Canada | Ontario | — | 2478659 |
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| Cryptogramma stelleri (S.G.Gmel.) Prantl | F. K. Butters 364 | 08 Jul 1932 | United States of America | Minnesota | Cook Co. Cliff north of… | — | 3485115 |
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| Cystopteris tenuis (Michx.) Desv. | F. K. Butters 464 | 17 Jul 1932 | United States of America | Minnesota | Cook Co. South of Clearwater… | — | 3800505 |
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| Dendrolycopodium dendroideum (Michx.) A.Haines | F. K. Butters 444 | 16 Jul 1932 | United States of America | Minnesota | Cook Co. North shore of… | — | 3148257 |
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| Diphasiastrum alpinum (L.) Holub | F. K. Butters a43 | 06 Sep 1905 | Canada | British Columbia | Yoho Valley | — | 3148162 |
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| Diphasiastrum complanatum (L.) Holub | F. K. Butters 456 | 16 Jul 1932 | United States of America | Minnesota | Cook Co. At top of… | — | 3504680 |
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| Diphasiastrum complanatum (L.) Holub | F. K. Butters 454 | 06 Jul 1932 | United States of America | Minnesota | Cook Co. Hillside north of… | — | 3504681 |
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| Diphasiastrum complanatum (L.) Holub | F. K. Butters s.n. | 22 Aug 1962 | Canada | Ontario | Thunder Bay View, Sibley Prov.… | — | 3148196 |
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| Dryopteris cristata (L.) A.Gray | F. K. Butters 145 | 13 Jul 1938 | United States of America | Minnesota | Cook Co. Swampy ground between… | — | 3550822 |
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| Dryopteris filix-mas (L.) Schott | F. K. Butters 612 | Aug 1910 | Canada | British Columbia | Slopes above Snow Sheds Glacier… | — | 3551154 |
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| Dryopteris filix-mas (L.) Schott | F. K. Butters 932 | 08 Sep 1920 | Canada | British Columbia | Glacier. Base of Avalanche Crest. | — | 3551151 |
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