Displaying 1 - 75 out of 6899 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Hedwigia albicans var. detonsa M.Howe | M. A. Howe 807 | 15 May 1896 | United States of America | California | Mendocino Co. Pieta | syntype | 474196 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Russian Gulch, Mendocino | isotype | 234740 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Russian Gulch, near Mendocino | isotype | 234741 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Russian Gulch, Mendocino | isotype | 234742 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Mendocino Co. Russian Gulch | isotype | 234743 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe | 09 May 1896 | United States of America | California | Russian Gulch, near Mendocino | isotype | 234744 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Russian Gulch, near Mendocino | holotype | 291904 |
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| Blepharostoma arachnoideum M.Howe | M. A. Howe 703 | 09 May 1896 | United States of America | California | Russian Gulch, near Mendocino | isotype | 00291905 |
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| Dicranella howei Renauld & Cardot | M. A. Howe 36 | 05 Apr 1892 | United States of America | California | Marin Co. Mt. Tamalpais | type | 299910 |
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| Dicranella howei Renauld & Cardot | M. A. Howe 36 | Apr 1892 | United States of America | California | Marin Co. Mt. Tamalpais | type | 299911 |
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| Dicranella howei Renauld & Cardot | M. A. Howe | 1892 | United States of America | California | Marin Co. | type | 299912 |
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| Porella dentata (Hartm.) Lindb. | M. A. Howe 1084 | 08 Jun 1896 | United States of America | California | Humboldt Co. Russ and Graham's… | — | 240347 |
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| Clevea hyalina var. californica M.Howe | M. A. Howe 765 | 13 May 1896 | United States of America | California | Doolan's Canyon, near Ukiah (Mendecino… | type | 575661 |
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| Clevea hyalina var. californica M.Howe | M. A. Howe | 1896 | United States of America | California | Mendocino Co. | type fragment | 575664 |
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| Clevea hyalina var. californica M.Howe | M. A. Howe 765 | — | United States of America | California | Mendocino Co. | type fragment | 575665 |
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| Cupressus goveniana Gordon | M. A. Howe s.n. | 05 May 1896 | United States of America | California | "Plains" near Mendocino City | — | 16865 |
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| Botrychium dissectum Spreng. | M. A. Howe s.n. | 31 Oct 1898 | United States of America | New York | Bronx Co. Van Cortlandt Park | — | 02172968 |
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| Botrychium dissectum Spreng. | M. A. Howe s.n. | 31 Oct 1898 | United States of America | New York | Bronx Co. Van Cortlandt Park | — | 02172971 |
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| Gyrothyra underwoodiana M.Howe | M. A. Howe 1026 | 05 Jun 1896 | United States of America | California | Humboldt Co. On the road… | type | 564824 |
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| Pseudoleskea rigescens var. howei Best | M. A. Howe | 05 Aug 1894 | United States of America | — | Above Neal's Camp, Mt. Shasta | type | 534714 |
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| Pseudoleskea rigescens var. howei Best | M. A. Howe 115 | 05 Aug 1894 | United States of America | California | Above Neal's Camp, Mt. Shasta.… | probable type | 534715 |
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| Pseudoleskea rigescens var. howei Best | M. A. Howe 115 | 24 Jul 1894 - 10 Aug 1894 | United States of America | California | Above Neal's Camp, Mt. Shasta.… | probable type | 534716 |
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| Pseudoleskea rigescens var. howei Best | M. A. Howe 115 | Aug 1894 | United States of America | California | Mt. Shasta | probable type | 534717 |
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| Pseudoleskea rigescens var. howei Best | M. A. Howe 115 | 05 Aug 1894 | United States of America | California | Above Neal's Camp, Mt. Shasta | probable type | 534718 |
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| Pleuridium alternifolium var. howei Renauld & Cardot | M. A. Howe 37 | 19 May 1892 | United States of America | California | type | 769411 |
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| Frullania riojaneirensis (Raddi) Spruce | M. A. Howe 814 | 15 Mar 1906 | Puerto Rico | — | Mount Morales, near Utuado | — | 574296 |
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| Frullania riojaneirensis (Raddi) Spruce | M. A. Howe 1096 | 19 Mar 1906 | Puerto Rico | — | Mount Morales, near Utuado | — | 574298 |
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| Frullania riojaneirensis (Raddi) Spruce | M. A. Howe 484 | 15 Mar 1906 | Puerto Rico | — | Mount Morales, near Utuado | — | 574301 |
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| Lopholejeunea howei A.Evans | M. A. Howe 1413p.p. | 05 Mar 1906 | Puerto Rico | — | Between Cayey and Caguas; Coamo… | type | 582189 |
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| Asplenium scolopendrium var. americanum (Fernald) Kartesz & K.N.Ghandi | M. A. Howe s.n. | 04 Jul 1902 | United States of America | New York | Onondaga Co. Green Lake region | — | 9605 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe 45 | 25 Nov 1892 | United States of America | California | Marin Co. | — | 465834 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe | 08 Aug 1894 | United States of America | California | Shasta Springs | — | 465835 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe | 29 Feb 1896 | United States of America | California | Contra Costa Co. Mitchell's Cañon,… | — | 465848 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe | Mar 1896 | United States of America | California | Sonoma Co. | — | 465845 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe 778 | 13 May 1896 | United States of America | California | Mendocino Co. Doolan's Cañon | — | 465846 |
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| Metaneckera menziesii (Drumm.) Steere | M. A. Howe 700 | 09 May 1896 | United States of America | California | Mendocino Co. Russian Gulch | — | 465847 |
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| Isothecium howei Kindb. | M. A. Howe | 16 Jan 1892 | United States of America | California | Marin Co. The "Old Mill"… | type | 693099 |
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| Hylocereus monacanthus (Lem.) Britton & Rose | M. A. Howe s.n. | — | Panama | — | Urava Islands. | — | 679790 |
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| Isothecium howei Kindb. | M. A. Howe | 16 Jan 1892 | United States of America | California | Marin Co. | type | 734850 |
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| Halimeda simulans M.Howe | M. A. Howe 4332 | 06 Mar 1906 | Puerto Rico | — | Culebra Island | holotype | 00887502 |
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| Halimeda simulans M.Howe | M. A. Howe 4383 | 08 Mar 1906 | Puerto Rico | — | Culebra Island | paratype | 00887503 |
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| Halimeda scabra M.Howe | M. A. Howe 2905 | 30 Mar 1904 | United States of America | Florida | Sands Key | holotype | 00887511 |
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| Halimeda lacrimosa M.Howe | M. A. Howe 5524 | 11 Dec 1907 | Bahamas | — | Mariguana [Mayaguana], Southeast Point | holotype | 00887523 |
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| Acetabulum pusillum M.Howe | M. A. Howe 5731 b | 22 Dec 1907 | Bahamas | — | Castle Island, near Acklin Island,… | paratype | 00887528 |
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| Acetabulum pusillum M.Howe | M. A. Howe 5453 | 09 Dec 1907 | Bahamas | — | Mariguana [Mayaguana], near Southeast Point | paratype | 00887529 |
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| Cladocephalus scoparius M.Howe | M. A. Howe 3081 | 10 Apr 1904 | Bahamas | — | south shore of New Providence | paratype | 00887530 |
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| Avrainvillea digitata D.S.Littler & Littler | M. A. Howe 5436 | 08 Dec 1907 | Bahamas | — | Mariguana [Mayaguana], Abraham Bay, on… | isotype | 00887553 |
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| Avrainvillea digitata D.S.Littler & Littler | M. A. Howe 5436 | 08 Dec 1907 | Bahamas | — | Mariguana [Mayaguana], Abraham Bay, on… | isotype | 00887554 |
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| Avrainvillea digitata D.S.Littler & Littler | M. A. Howe 5436 | 08 Dec 1907 | Bahamas | — | Mariguana [Mayaguana], Abraham Bay, on… | isotype | 00887556 |
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| Avrainvillea nigricans f. fulva M.Howe | M. A. Howe 5745 | 22 Dec 1907 | Bahamas | — | Castle Island. inside a reef,… | — | 00887561 |
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| Avrainvillea nigricans f. fulva M.Howe | M. A. Howe 5745 | 22 Dec 1907 | Bahamas | — | Castle Island. inside a reef,… | type | 00887560 |
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| Avrainvillea nigricans f. fulva M.Howe | M. A. Howe 5745 | 22 Dec 1907 | Bahamas | — | Castle Island. inside a reef,… | type | 00887562 |
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| Protoderma polyrhizum M.Howe | M. A. Howe 5686 | 19 Dec 1907 | Turks and Caicos Islands | — | Caicos. In a cavern, low… | holotype | 00887607 |
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| Symploca howei N.L.Gardner | M. A. Howe 7416 | 04 Jul 1915 | Puerto Rico | — | Off the mouth of Guanica… | paratype | 00900079 |
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| Oscillatoria salinarum Collins | M. A. Howe s.n. | 29 Jun 1903 | Puerto Rico | — | Salinas Bay, near Guánica, ditches… | type | 00953613 |
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| Oscillatoria salinarum Collins | M. A. Howe 2669 | 29 Jun 1903 | Puerto Rico | — | Salinas Bay, near Guánica, ditches… | type | 00953614 |
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| Lithophyllum antillarum Foslie & M.Howe | M. A. Howe 4373 | 07 Mar 1906 | Puerto Rico | — | Culebra Island, Flamingo Bay. | photo of holotype | 00900373 |
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| Echinochloa crus-galli (L.) P.Beauv. | M. A. Howe s.n. | 29 Aug 1891 | United States of America | Vermont | Newfane | — | 1697577 |
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| Ochrolechia upsaliensis (L.) A.Massal. | M. A. Howe 25 | 24 Jul 1894 - 10 Aug 1894 | United States of America | California | Siskiyou Co. | — | 1708700 |
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| Ochrolechia upsaliensis (L.) A.Massal. | M. A. Howe | 26 Feb 1896 | United States of America | California | Contra Costa Co. Mt. Diablo. | — | 1708707 |
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| Ochrolechia upsaliensis (L.) A.Massal. | M. A. Howe 25 | 24 Jul 1894 - 10 Aug 1894 | United States of America | California | Siskiyou Co. | — | 1708709 |
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| Ochrolechia upsaliensis (L.) A.Massal. | M. A. Howe 25 | 24 Jul 1894 - 10 Aug 1894 | United States of America | California | Siskiyou Co. | — | 1708710 |
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| Elymus canadensis L. | M. A. Howe s.n. | 22 Aug 1891 | United States of America | Vermont | Newfane | — | 1654305 |
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| Roystonea borinquena O.F.Cook | M. A. Howe | Mar 1906 | Puerto Rico | — | Near Utuado | — | 01025460 |
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| Ochroma pyramidale (Cav. ex Lam.) Urb. | M. A. Howe | Mar 1906 | Puerto Rico | Utuado | Near Utuado, Porto Rico. | — | 1025179 |
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| Scleropodium californicum (Lesq.) Kindb. | M. A. Howe 528 | 23 Mar 1896 | United States of America | California | San Francisco Co. Clarendon Heights | — | 01030186 |
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| Scleropodium californicum (Lesq.) Kindb. | M. A. Howe 13 | 12 Mar 1892 | United States of America | California | San Francisco Co. r | — | 01030187 |
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| Calotropis procera (Aiton) W.T.Aiton | M. A. Howe | Mar 1906 | Puerto Rico | — | Near Aibonito | — | 01071477 |
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| Schefflera morototoni (Aubl.) Maguire, Steyerm. & Frodin | M. A. Howe s.n. | Mar 1906 | Puerto Rico | Utuado | — | 01089874 |
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| Dasyopsis antillarum M.Howe | M. A. Howe 5625 | 18 Dec 1907 | Turks and Caicos Islands | — | Caicos. Fort George Cay | holotype | 01089170 |
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| Ruppia maritima L. | M. A. Howe 195 | 03 Mar 1906 - 12 Mar 1906 | Puerto Rico | Culebra | Flamingo Bay. | — | 01090135 |
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| Neomeris cokeri M.Howe | M. A. Howe 3075 | s.d. | Bahamas | — | New Providence | — | 00887567 |
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| Ulva lactuca L. | M. A. Howe 3850 | 10 Feb 1905 | Bahamas | — | on south shore of Great… | — | 02139746 |
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| Chara hornemannii Wallman | M. A. Howe s.n. | 11 Mar 1906 | Puerto Rico | — | Island of Culebrita | — | 01020179 |
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| Chara hornemannii Wallman | M. A. Howe 4053 | 21 Feb 1905 | Bahamas | Exuma | Exuma Chain, Great Guana Cay,… | — | 01020180 |
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