Displaying 1 - 25 out of 1564 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Gloeosporium betularum Ellis & G.Martin | J. G. Jack s.n. | 04 Aug 1892 - 24 Aug 1892 | United States of America | Massachusetts | Jamaica Plain, Arnold Arboretum | — | 3449691 |
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| Septoria betulae (Lib.) Westend. | J. G. Jack s.n. | 24 Aug 1892 | United States of America | Massachusetts | Jamaica Plain, Arnold Arboretum | — | 3619805 |
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| Uncinula salicis (DC.) G.Winter | J. G. Jack s.n. | 25 Aug 1892 | United States of America | Massachusetts | Arnold Arboretum, Jamaica Plain | — | 2946435 |
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| Uncinula salicis (DC.) G.Winter | J. G. Jack s.n. | 25 Aug 1892 | United States of America | Massachusetts | Suffolk Co. Arnold Arboretum | — | 2946434 |
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| Cochlospermum vitifolium (Willd.) Spreng. | J. G. Jack 6934 | 09 Feb 1900 | Cuba | Villa Clara | Santa Clara. Soledad, Cienfuegos. | — | 1623401 |
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| Bryum pallescens Schleich. ex Schwägr. | J. G. Jack 4 | 27 Jul 1900 | United States of America | Wyoming | Granite Creek, Bighorn Mts. | — | 403779 | ||
| Aulacomnium palustre (Hedw.) Schwägr. | J. G. Jack 5 | 27 Jul 1900 | United States of America | Wyoming | Granite Creek, Bighorn Mts. | — | 403447 | ||
| Oncophorus wahlenbergii Brid. | J. G. Jack 7 | 29 Jul 1900 | United States of America | Wyoming | Tongue River, Bighorn Mts. | — | 331215 | ||
| Aulacomnium palustre (Hedw.) Schwägr. | J. G. Jack 12 | 04 Aug 1900 | United States of America | Wyoming | Paintrock Creek, Bighorn Mts. | — | 403450 | ||
| Coscinodon calyptratus (Drumm.) C.E.O.Jensen | J. G. Jack | 24 Aug 1900 | United States of America | Wyoming | Bighorn Mts. | — | 780449 | ||
| Grimmia laevigata (Brid.) Brid. | J. G. Jack 1 | 24 Aug 1900 | United States of America | Wyoming | Bighorn Mts. | — | 351172 | ||
| Briza maxima L. | J. G. Jack s.n. | 03 Sep 1901 | United States of America | Massachusetts | Norfolk Co. Botanical Garden, Wellesley… | — | 1163489 |
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| Briza maxima L. | J. G. Jack s.n. | 03 Sep 1901 | United States of America | Massachusetts | Norfolk Co. Botanical Garden, Wellesley… | — | 1163490 |
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| Letharia columbiana (Nutt.) J.W.Thomson | J. G. Jack | 08 Aug 1907 | United States of America | California | Madera Co. Shinn's Camp, Sierras | — | 1566554 |
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| Juniperus osteosperma (Torr.) Little | J. G. Jack 1188 | 26 Aug 1918 | United States of America | Idaho | Bannock Co. Mink Creek Canyon,… | — | 20430 |
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| Acer glabrum var. douglasii (Hook.) Dippel | J. G. Jack 1534 | 14 Sep 1918 | United States of America | Montana | Glacier Park, upper St. Mary… | — | 2484134 |
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| Parapolystichum confine (C.Chr.) Labiak, Sundue & R.C.Moran | J. G. Jack 10343 | 11 Jul 1921 - 14 Aug 1921 | Cuba | — | Loma del Gato and vicinity.… | — | 1661601 |
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| Salix bebbiana var. bebbiana | J. G. Jack 3150 | 17 Jun 1924 | Canada | Nova Scotia | Yarmouth Co. Pleasant Valley. | — | 2411789 |
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| Salix balsamifera (Hook.) Barratt ex Andersson | J. G. Jack 3178 | 17 Jun 1924 | United States of America | Ohio | Yarmouth Co. | — | 2405364 |
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| Lonicera caerulea L. | J. G. Jack 3809 | 23 Jun 1924 | Canada | Nova Scotia | Pictou Co. | — | 2436143 |
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| Ilex glabra (L.) A.Gray | J. G. Jack 3444 | 14 Sep 1924 | Canada | Nova Scotia | Shelburne Co. Barrington | — | 2519747 |
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| Ilex verticillata (L.) A.Gray | J. G. Jack 3485 | 16 Sep 1924 | Canada | Nova Scotia | Queens Co. | — | 2638180 |
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| Salix discolor Muhl. | J. G. Jack 3532 | 20 Sep 1924 | Canada | Nova Scotia | Lunenburg Co. Gold River. | — | 2412971 |
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| Alnus incana subsp. rugosa (Du Roi) R.T.Clausen | J. G. Jack 3742 | 07 Oct 1924 | Canada | Nova Scotia | Yarmouth Co. Eel Pond, Eel… | — | 2471706 |
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| Cornus amomum subsp. amomum | J. G. Jack 3385 | 16 Oct 1924 | United States of America | Maine | York Co. Cape Neddick | — | 2502873 |
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