Displaying 1 - 25 out of 6891 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Lithomyxa calcigena f. ferrifera M.Howe | D. White | C. B. Read | M. A. Howe s.n. | 07 Dec 1930 | United States of America | West Virginia | Furnace creek, near Harpen's Ferry. | probable type | 945514 |
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| Lithomyxa calcigena M.Howe | D. White | C. B. Read | M. A. Howe s.n. | 07 Dec 1930 | United States of America | West Virginia | Furnace creek, near Harpen's Ferry. | holotype | 945512 |
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| Lithomyxa calcigena M.Howe | D. White | C. B. Read | M. A. Howe s.n. | 07 Dec 1930 | United States of America | West Virginia | Furnace creek, near Harpen's Ferry. | type | 945513 |
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| Protococcus | D. White | M. A. Howe | C. B. Read s.n. | 07 Dec 1930 | United States of America | West Virginia | Furnace Creek, 1 1/2 miles… | — | 2110074 |
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| Protococcus | D. White | M. A. Howe | C. B. Read s.n. | 07 Dec 1930 | United States of America | West Virginia | Furnace Creek, 1 1/2 miles… | — | 2285435 |
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| Ceramium byssoideum Harv. | M. A. Howe ? | 15 Apr 1904 | Bahamas | — | North Cat Cay | — | 2115065 |
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| Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy | M. A. Howe 1 | 30 May 1896 | United States of America | California | Humboldt Co. | — | 3550900 |
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| Ramalina complanata (Sw.) Ach. | M. A. Howe 1 | 05 Jun 1900 | Bermuda | Saint George's | Paynters Hill | — | 4512924 |
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| Cladophora membranacea Hofman Bang ex C.Agardh | M. A. Howe 1 | 05 Jun 1900 | Bermuda | — | Hamilton Harbor, White's Island, on… | — | 2129763 |
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| Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy | M. A. Howe 2 | 30 May 1896 | United States of America | California | Eureka | — | 3550899 |
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| Nitella clavata Kütz. | M. A. Howe 2 | 21 Oct 1892 | United States of America | California | San Francisco Co. Lake Merced,… | — | 2020934 |
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| Nitella clavata Kütz. | M. A. Howe 2 | 21 Oct 1892 | United States of America | California | San Francisco Co. Lake Merced,… | — | 2020922 |
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| Spyridia filamentosa (Wulfen) Harv. | M. A. Howe 2 | 08 Aug 1900 | United States of America | Massachusetts | Dukes Co. | — | 2267108 |
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| Leptogium denticulatum Tuck. | M. A. Howe 2 | 14 Jun 1900 | Bermuda | Hamilton | Walsingham | — | 4510397 |
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| Chara contraria A.Braun ex Kütz. | M. A. Howe 3 | Apr 1892 | United States of America | California | Santa Clara Co. | — | 2017657 |
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| Bryopsis hypnoides J.V.Lamour. | M. A. Howe 3 | 05 Jun 1900 | Bermuda | — | Hamilton Harbor, White's Island, on… | — | 2024962 |
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| Polysiphonia ferulacea Suhr ex J.Agardh | M. A. Howe 4 | 05 Jun 1900 | Bermuda | — | Hamilton Harbor, White's Island | — | 2186782 |
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| Chara globularis Thuill. | M. A. Howe 4 | Jul 1892 | United States of America | California | Lake Majella, near Monterey | — | 2018107 |
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| Sphacelaria cirrosa (Roth) C.Agardh | M. A. Howe 4 | 08 Aug 1900 - 18 Aug 1900 | United States of America | Massachusetts | Dukes Co. | — | 2274166 |
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| Rhizoclonium hookeri Kütz. | M. A. Howe 5 | 06 Jun 1900 | Bermuda | — | Hamilton Harbor, Paget shore | — | 2134414 |
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| Padina australis Hauck | M. A. Howe 6 | 05 Jun 1900 | Bermuda | — | Hamilton Harbor, White's Island | — | 2258074 |
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| Padina pavonia (L.) J.V.Lamour. | M. A. Howe 6 | 05 Jun 1900 | Bermuda | — | Hamilton Harbor, White's Island | — | 2268801 |
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| Chara vulgaris L. | M. A. Howe 6 | Jul 1893 | United States of America | Vermont | Rutland Co. West Haven | — | 2019691 |
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| Champia parvula (C.Agardh) Harv. | M. A. Howe 6 | 08 Aug 1900 | United States of America | Massachusetts | Dukes Co. | — | 2176592 |
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| Agardhiella tenera (J.Agardh) F.Schmitz | M. A. Howe 7 | 08 Aug 1900 | United States of America | Massachusetts | Dukes Co. at base of… | — | 2178211 |
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