Displaying 1 - 50 out of 245 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Acetabularia crenulata (J.V.Lamour.) Kuntze | C. H. Clarke s.n. | Jun 1984 | United States of America | Florida | west coast | — |
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| Actinococcus subcutaneus (Lyngb. ex Hornem.) Rosenv. | C. H. Clarke s.n. | Sep 1886 | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Actinococcus subcutaneus (Lyngb. ex Hornem.) Rosenv. | C. H. Clarke s.n. | Sep 1896 | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Agarum turneri Postels & Rupr. | C. H. Clarke s.n. | — | United States of America | Massachusetts | Essex Co. on the beach | — |
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| Ahnfeltia plicata (Huds.) Fr. | C. H. Clarke s.n. | — | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Alaria | C. H. Clarke s.n. | 21 Jun 1897 | United States of America | Massachusetts | Essex Co. | — |
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| Alaria | C. H. Clarke s.n. | 21 Jun 1897 | United States of America | Massachusetts | Essex Co. | — |
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| Amblystegium radicale (P.Beauv.) Mitt. | C. H. Clarke | 28 May 1902 | United States of America | Massachusetts | Chestnut Hill, near Boston | — | ||||
| Amblystegium serpens var. juratzkanum (Schimp.) Rau & Herv. | C. H. Clarke | 28 May 1902 | United States of America | Massachusetts | Chestnut Hill, near Boston | — | ||||
| Amblystegium serpens var. juratzkanum (Schimp.) Rau & Herv. | C. H. Clarke | 28 May 1902 | United States of America | Massachusetts | Chestnut Hill, near Boston. | — | ||||
| Amblystegium varium (Hedw.) Lindb. | C. H. Clarke | 28 May 1902 | United States of America | Massachusetts | Suffolk Co. Chestnut Hill. | — | ||||
| Amblystegium varium (Hedw.) Lindb. | C. H. Clarke | 28 May 1902 | United States of America | Massachusetts | Suffolk Co. Chestnut Hill. | — | ||||
| Aralia racemosa var. racemosa | C. H. Clarke s.n. | 24 Aug 1901 | United States of America | New Jersey | Palisades. | — |
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| Astraeus hygrometricus (Pers.) Morgan | C. H. Clarke s.n. | s.d. | United States of America | Massachusetts | — |
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| Bangia ciliaris Carmich. | C. H. Clarke s.n. | Aug 1900 | United States of America | Massachusetts | Essex Co. | — |
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| Blasia pusilla L. | C. H. Clarke | — | United States of America | Pennsylvania | Crawford Co. | — | ||||
| Blasia pusilla L. | C. H. Clarke 4 | 30 Aug 1897 | United States of America | Massachusetts | Essex Co. | — | ||||
| Blidingia marginata (J.Agardh) P.J.L.Dang. | C. H. Clarke s.n. | 26 Oct 1896 | United States of America | Massachusetts | Norfolk Co. Lower Bay, on… | — |
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| Calliergon cordifolium (Hedw.) Kindb. | C. H. Clarke | 24 Jul 1905 | United States of America | Massachusetts | Essex Co. Cape Ann, between… | — | ||||
| Campyliadelphus chrysophyllus (Brid.) Kanda | C. H. Clarke | Oct 1890 | United States of America | Maine | Androscoggin Co. | — | ||||
| Cantharellula umbonata (Fr.) Singer | C. H. Clarke | s.d. | — | — | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | s.d. | — | — | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | s.d. | — | — | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | s.d. | — | — | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | s.d. | — | — | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | 1888 | United States of America | Massachusetts | — |
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| Cantharellus dichotomus Peck | C. H. Clarke s.n. | 1886 | United States of America | Massachusetts | — |
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| Cantharellus infundibuliformis Fr. | C. H. Clarke s.n. | Sep 1890 | United States of America | Massachusetts | Essex Co. Magnolia. | — |
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| Cantharellus infundibuliformis Fr. | C. H. Clarke s.n. | Sep 1890 | United States of America | Massachusetts | Essex Co. Magnolia. | — |
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| Castagnea divaricata (C.Agardh) J.Agardh | C. H. Clarke s.n. | Oct 1894 | United States of America | Massachusetts | Barnstable Co. Buzzards Bay | — |
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| Ceramium squarrosum (Harv.) J.Agardh | C. H. Clarke s.n. | — | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Chaetomorpha linum (O.F.Müll.) Kütz. | C. H. Clarke s.n. | — | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Chaetomorpha melagonium (F.Weber & D.Mohr) Kütz. | C. H. Clarke s.n. | Jul 1897 | United States of America | Massachusetts | Essex Co. in tide pools | — |
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| Chaetomorpha melagonium (F.Weber & D.Mohr) Kütz. | C. H. Clarke s.n. | Jul 1897 | United States of America | Massachusetts | Essex Co. in tide pools | — |
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| Chaetomorpha melagonium (F.Weber & D.Mohr) Kütz. | C. H. Clarke s.n. | Jul 1897 | United States of America | Massachusetts | Essex Co. in tide pools | — |
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| Chaetomorpha melagonium (F.Weber & D.Mohr) Kütz. | C. H. Clarke s.n. | Jul 1897 | United States of America | Massachusetts | Essex Co. in tide pools | — |
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| Chaetomorpha melagonium f. rupincola Kjellm. | C. H. Clarke s.n. | Jul 1897 | United States of America | Massachusetts | Essex Co. in tide pools | — |
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| Chaetomorpha tortuosa Kütz. | C. H. Clarke s.n. | 1904 | United States of America | Massachusetts | — |
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| Champia parvula (C.Agardh) Harv. | C. H. Clarke s.n. | 29 Sep 1896 | United States of America | Massachusetts | Norfolk Co. | — |
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| Chiloscyphus polyanthos var. fragilis (Roth) Müll.Frib. | C. H. Clarke 11 | 07 Sep 1899 | United States of America | Massachusetts | Essex Co. Below the Crescent… | — | ||||
| Chondrus crispus Stackh. | C. H. Clarke s.n. | Summer | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Chondrus crispus Stackh. | C. H. Clarke | L. M. Peabody s.n. | 11 May 1900 | United States of America | Massachusetts | Suffolk Co. Boston Harbor, Castle… | — |
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| Chondrus crispus Stackh. | C. H. Clarke s.n. | 09 May 1900 | United States of America | Massachusetts | Suffolk Co. Between tides, Castle… | — |
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| Chondrus crispus Stackh. | C. H. Clarke s.n. | — | United States of America | Massachusetts | Suffolk Co. City Point | — |
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| Chondrus crispus Stackh. | C. H. Clarke | L. M. Peabody s.n. | 11 May 1900 | United States of America | Massachusetts | Suffolk Co. Boston Harbor, Castle… | — |
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| Chorda filum (L.) Stackh. | C. H. Clarke s.n. | 29 Jul | United States of America | Massachusetts | Essex Co. | — |
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| Chorda filum (L.) Stackh. | C. H. Clarke s.n. | Summer 1898 | United States of America | Massachusetts | Essex Co. Magnolia | — |
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| Chorda filum (L.) Stackh. | C. H. Clarke s.n. | Summer 1900 | United States of America | Massachusetts | Essex Co. | — |
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| Chordaria flagelliformis (O.F.Müll.) C.Agardh | C. H. Clarke s.n. | 27 Aug 1892 | United States of America | — | New England | — |
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| Chordaria flagelliformis (O.F.Müll.) C.Agardh | C. H. Clarke s.n. | 29 Jul | United States of America | Massachusetts | Essex Co. | — |
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