Displaying 1 - 74 out of 74 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Agalinis tenuifolia (Vahl) Raf. var. tenuifolia | O. R. Willis s.n. | 1882 | United States of America | New York | Westchester Co. | — | 3251975 |
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| Andromeda glaucophylla Link | O. R. Willis s.n. | 23 Aug 1884 | United States of America | New York | Great Otter Lake, Adirondacks. | — | 2153294 |
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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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| Aureolaria grandiflora (Benth.) Pennell | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3253019 |
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| Barbarea stricta Andrz. | O. R. Willis s.n. | Jun 1882 | United States of America | New York | Westchester Co. | — | 3172395 |
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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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| Carex prasina Wahlenb. | O. R. Willis s.n. | — | — | — | White Plains. | — | 2297936 |
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| Carex prasina Wahlenb. | O. R. Willis s.n. | — | — | — | White Plains. | — | 2297937 |
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| Carex sparganioides Muhl. ex Willd. | O. R. Willis s.n. | — | — | — | White Plains | — | 2303988 |
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| Cerastium fontanum Baumg. | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. | — | 3162407 |
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| Cercis canadensis L. | O. R. Willis s.n. | 04 Jul 1889 | United States of America | New York | Westchester Co. | — | 2724554 |
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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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| Collinsonia canadensis L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3030304 |
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| Desmodium nudiflorum (L.) DC. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 2567319 |
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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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| Distichlis spicata (L.) Greene | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 1697135 |
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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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| Eupatorium resinosum Torr. | O. R. Willis s.n. | 1845 | United States of America | New York | Long Island | — | 31112 |
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| Eurybia divaricata (L.) G.L.Nesom | O. R. Willis s.n. | Oct 1862 | — | — | [possibly "Mass"] | — | 1845820 |
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| Eurybia schreberi (Nees) Nees | O. R. Willis | 1870 | United States of America | New York | Westchester Co. | — | 1860381 |
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| Eurybia schreberi (Nees) Nees | O. R. Willis | 1862 | United States of America | New York | Westchester Co. | — | 1860382 |
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| Galium lanceolatum (Torr. & A.Gray) Torr. | O. R. Willis s.n. | Jun 1882 | United States of America | New York | Westchester Co. | — | 3458122 |
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| Geum virginianum L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 2810885 |
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| Hedeoma pulegioides (L.) Pers. | O. R. Willis s.n. | 15 Aug 1866 | United States of America | New Jersey | Passaic Co. | — | 3038569 |
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| Hibiscus moscheutos L. | O. R. Willis s.n. | s.d. [late 1800s?] | United States of America | New York | Westchester Co. | — | 1239838 |
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| Hydrocotyle americana L. | O. R. Willis s.n. | Jul 1882 | United States of America | New York | Westchester Co. | — | 3477218 |
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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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| Juglans cinerea L. | O. R. Willis s.n. | 20 May 1862 | — | — | White Plains. | — | 1486091 |
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| Kalmia latifolia var. latifolia | O. R. Willis s.n. | 18 Jun 1874 | United States of America | New York | Westchester Co. White Plains | — | 2524359 |
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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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| Liatris scariosa var. nieuwlandii (Lunell) E.G.Voss | O. R. Willis s.n. | 1900 | United States of America | New York | Westchester Co. | — | 3043331 |
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| Lonicera caprifolium L. | O. R. Willis s.n. | May 21/69 | United States of America | New York | Westchester Co. Rye Pond | — | 2437408 |
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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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| Muhlenbergia frondosa (Poir.) Fernald | O. R. Willis | — | United States of America | New Jersey | Hudson Co. | — | 1756246 |
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| Panax trifolium L. | O. R. Willis | — | United States of America | New York | Westchester Co. | — | 198919 |
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| Pedicularis canadensis L. | O. R. Willis s.n. | May 1874 | United States of America | New York | Westchester Co. | — | 3298691 |
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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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| Poa nemoralis L. | O. R. Willis s.n. | s.d. | United States of America | New York | Westchester Co. | — | 1791977 |
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| Polygala verticillata L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 2677357 |
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| Polygonella articulata (L.) Meisn. | O. R. Willis s.n. | 07 Oct 1877 | United States of America | New Jersey | West Hampton, Long Island | — | 3140355 |
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| Polygonum erectum L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3150641 |
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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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| Polystichum munitum var. munitum | O. R. Willis s.n. | 1882 | United States of America | Washington | Wilkeson | — | 3540238 |
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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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| Pycnanthemum virginianum (L.) B.L.Rob. & Fernald | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. | — | 3092658 |
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| Ranunculus aquatilis var. diffusus With. | O. R. Willis s.n. | 04 Jun 1875 | United States of America | New York | Westchester Co. | — | 2784893 |
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| Ranunculus hispidus Michx. var. hispidus | O. R. Willis s.n. | May 1869 | United States of America | New York | Westchester Co. | — | 2788287 |
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| Ranunculus hispidus var. caricetorum (Greene) T.Duncan | O. R. Willis s.n. | 28 May 1875 | United States of America | New York | Westchester Co. | — | 2788196 |
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| Ranunculus pennsylvanicus L.f. | O. R. Willis s.n. | 1849 | United States of America | New Jersey | Mercer Co. | — | 2790305 |
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| Rhododendron viscosum (L.) Torr. | O. R. Willis s.n. | 28 Jun 1882 | United States of America | New York | Westchester Co. | — | 2542165 |
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| Rhododendron viscosum (L.) Torr. | O. R. Willis s.n. | June 28/82 | United States of America | New York | Westchester Co. | — | 2542259 |
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| Rubus nigrobaccus L.H.Bailey | O. R. Willis s.n. | 15 Jun 1869 | United States of America | New York | Westchester Co. | — | 2887045 |
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| Rubus occidentalis L. | O. R. Willis s.n. | 16 Apr 1882 | United States of America | New York | Westchester Co. | — | 2887410 |
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| Rubus odoratus L. | O. R. Willis s.n. | 16 Apr 1862 | United States of America | New York | Westchester Co. | — | 2888045 |
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| Rubus procumbens Muhl. | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. | — | 2887696 |
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| Senna hebecarpa (Fernald) H.S.Irwin & Barneby | O. R. Willis s.n. | s.d. | United States of America | New York | — | 1581753 |
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| Silene caroliniana var. pensylvanica (Michx.) Fernald | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. | — | 3309430 |
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| Solidago rugosa Mill. var. rugosa | O. R. Willis s.n. | Aug. 51 | United States of America | New Jersey | Monmouth Co. Freehold. | — | 2369694 |
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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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| Thalictrum thalictroides (L.) A.J.Eames & B.Boivin | O. R. Willis s.n. | May 1874 | United States of America | New York | Westchester Co. | — | 2802462 |
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| Trichostema dichotomum L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3135805 |
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| Tsuga canadensis (L.) Carrière | O. R. Willis s.n. | 31 May 1862 | United States of America | New York | Westchester Co. Rye Pond | — | 64164 |
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| Verbascum blattaria L. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3322246 |
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| Veronicastrum virginicum (L.) Farw. | O. R. Willis s.n. | 1862 | United States of America | New York | Westchester Co. | — | 3339393 |
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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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| Viola sororia Willd. | O. R. Willis s.n. | s.d. | United States of America | New York | Westchester Co. | — | 3576387 |
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| Zinnia elegans Jacq. | O. R. Willis s.n. | — | United States of America | New York | Westchester Co. | — | 3202232 |
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