Displaying 1 - 25 out of 98 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Closterium acerosum Ehrenb. ex Ralfs | H. M. Richards 215 | 21 May 1893 | United States of America | Massachusetts | Middlesex Co. | — |
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| Oedogonium fragile Wittr. ex Hirn | H. M. Richards s.n. | 19 May 1895 | United States of America | Massachusetts | Middlesex Co. Hammonds Pond | — |
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| Audouinella purpurea (Lightf.) Woelk. | H. M. Richards s.n. | 10 Mar 1889 | United States of America | Massachusetts | Essex Co. | — |
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| Batrachospermum helminthosum Bory | H. M. Richards s.n. | 1891 | United States of America | Massachusetts | Norfolk Co. | — |
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| Polysiphonia fastigiata (Roth) Grev. | H. M. Richards 72 | 11 Mar 1889 | United States of America | Massachusetts | Essex Co. Nahant | — |
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| Characium cylindricum F.D.Lamb. | H. M. Richards s.n. | 12 Nov 1889 | United States of America | Massachusetts | Middlesex Co. | — |
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| Rhodymenia palmata (L.) Grev. | H. M. Richards s.n. | 25 May 1892 | United States of America | Massachusetts | Essex Co. | — |
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| Spirogyra varians (Hassall) Kütz. | H. M. Richards s.n. | May 1894 | United States of America | Massachusetts | Middlesex Co. | — |
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| Oedogonium nodulosum Wittr. ex Hirn | H. M. Richards s.n. | 26 May 1894 | United States of America | Massachusetts | Middlesex Co. Glacialis | — |
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| Monostroma collinsii Farl. | H. M. Richards 97 | 18 Apr 1891 | United States of America | Massachusetts | Essex Co. Little Nahant, rocks… | — |
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| Petrocelis | H. M. Richards s.n. | Oct 1888 | United States of America | Massachusetts | Essex Co. | — |
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| Haematococcus pluvialis Flot. | H. M. Richards s.n. | 03 Nov 1888 | United States of America | Massachusetts | Essex Co. on rocks above… | — |
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| Oedogonium nodulosum Wittr. ex Hirn | H. M. Richards s.n. | 26 May 1894 | United States of America | Massachusetts | Middlesex Co. Glacialis | — |
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| Characium cylindricum F.D.Lamb. | H. M. Richards s.n. | 12 Nov 1889 | United States of America | Massachusetts | Middlesex Co. | — |
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| Chroolepus umbrinum Kütz. | H. M. Richards s.n. | 19 Apr 1890 | United States of America | Massachusetts | Norfolk Co. on Pinus | — |
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| Enteromorpha percursa (C.Agardh) J.Agardh | H. M. Richards s.n. | May 1898 | United States of America | Massachusetts | Lynn marshes | — |
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| Aphanothece microscopica Nägeli | H. M. Richards s.n. | 18 Feb 1895 | United States of America | Massachusetts | Middlesex Co. Botanic Garden, on… | — |
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| Nostoc sphaeroides Kütz. | H. M. Richards s.n. | s.d. | United States of America | Massachusetts | Middlesex Co. Fresh Pond | — |
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| Pogonatum pensilvanicum (Hedw.) P.Beauv. | H. M. Richards | 07 Jun 1894 | United States of America | New Hampshire | Coös Co. | — | ||||
| Schizaea pusilla Pursh | H. M. Richards s.n. | s.d. | United States of America | New Jersey | Atlantic Co. | — |
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| Microspora amoena (Kütz.) Rabenh. | H. M. Richards 965 | 07 May 1909 | United States of America | New Jersey | Bergen Co. Englewood | — |
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| Draparnaldia acuta (C.Agardh) Kütz. | H. M. Richards 967 B | 07 May 1909 | United States of America | New Jersey | Bergen Co. | — |
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| Microspora amoena (Kütz.) Rabenh. | H. M. Richards 965 | 07 May 1909 | United States of America | New Jersey | Bergen Co. | — |
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| Zygnema pectinatum (Vaucher) C.Agardh | H. M. Richards s.n. | 06 Aug 1889 | United States of America | Pennsylvania | Chester Co. Oldmixon, in ditches | — |
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| Draparnaldia glomerata (Vaucher) C.Agardh | H. M. Richards s.n. | 24 Dec 1890 | United States of America | Pennsylvania | Chester Co. Oldminton, ditch by… | — |
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