Displaying 1 - 25 out of 6909 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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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 703 | 09 May 1896 | United States of America | California | Russian Gulch, near Mendocino | holotype | 291904 |
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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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| 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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| 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 | 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 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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