Displaying 26 - 50 out of 74 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Hydrocotyle americana L. | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. near Rye Lake | — | 3477229 |
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| Diphasiastrum tristachyum (Pursh) Holub | O. R. Willis s.n. | Oct 1862 | United States of America | Massachusetts | Williams Town | — | 3505349 |
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| Asclepias purpurascens L. | O. R. Willis s.n. | Jul 1862 | United States of America | New York | Westchester Co. | — | 3528160 |
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| Asclepias variegata L. | O. R. Willis s.n. | 1851 | United States of America | New Jersey | Freehold | — | 3529870 |
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| Phryma leptostachya L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3540995 |
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| Polystichum munitum var. munitum | O. R. Willis s.n. | 1882 | United States of America | Washington | Wilkeson | — | 3540238 |
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| Dryopteris goldiana (Hook.) A.Gray | O. R. Willis s.n. | 10 Aug 1880 | United States of America | New York | Westchester Co. | — | 3551444 |
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| Dryopteris goldiana (Hook.) A.Gray | O. R. Willis s.n. | 10 Aug 1880 | United States of America | New York | White Plains | — | 3551468 |
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| Dryopteris goldiana (Hook.) A.Gray | O. R. Willis s.n. | 10 Aug 1880 | United States of America | New York | Westchester Co. | — | 3551470 |
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| Viola blanda Willd. | O. R. Willis s.n. | s.d. | United States of America | New York | Westchester Co. | — | 3292877 |
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| Viola pubescens Aiton | O. R. Willis s.n. | May 18 1___ | United States of America | New York | Westchester Co. | — | 3577807 |
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| Lygodium palmatum (Bernh.) Sw. | O. R. Willis s.n. | 1845 | United States of America | New Jersey | Mercer Co. | — | 3554605 |
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| Polypodium virginianum L. | O. R. Willis s.n. | Oct 1862 | United States of America | New York | Westchester Co. | — | 3792929 |
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| Carex plantaginea Lam. | O. R. Willis s.n. | 21 May 1870 | United States of America | New York | Lewis Co. Leyden. | — | 2296926 |
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| Eupatorium resinosum Torr. | O. R. Willis s.n. | 1845 | United States of America | New York | Long Island | — | 31112 |
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| Chamaecrista fasciculata (Michx.) Greene | O. R. Willis s.n. | s.d. | United States of America | New York | White Plains | — | 01453622 |
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| Chamaecrista nictitans (L.) Moench var. nictitans | O. R. Willis s.n. | 1862 | United States of America | New York | White Plains | — | 01454308 |
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| Populus grandidentata Michx. | O. R. Willis s.n. | 10 Aug 1866 | United States of America | New Jersey | Passaic Co. West of Garret… | — | 2470280 |
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| Pycnanthemum flexuosum (Walter) Britton, Sterns & Poggenb. | O. R. Willis 1. | 10 Aug 1866 | United States of America | New Jersey | Passaic Co. West of Garret… | — | 3069251 |
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| Panax trifolium L. | O. R. Willis | — | United States of America | New York | Westchester Co. | — | 198919 |
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| Lespedeza frutescens (L.) Hornem. | O. R. Willis s.n. | 25 Oct 1889 | United States of America | New York | Westchester Co. | — | 2576065 |
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| Distichlis spicata (L.) Greene | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 1697135 |
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| Muhlenbergia frondosa (Poir.) Fernald | O. R. Willis | — | United States of America | New Jersey | Hudson Co. | — | 1756246 |
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| Spartina alterniflora Loisel. | O. R. Willis s.n. | s.d. | United States of America | New York | Westchester Co. | — | 1786842 |
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| Symphyotrichum cordifolium (L.) G.L.Nesom | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 1844895 |
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