Displaying 301 - 323 out of 323 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Juncus arcticus subsp. littoralis (Engelm.) Hultén | H. L. Mason 725 | 27 Apr 1949 | United States of America | California | Solano Co. On fringes of… | — |
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| Alopecurus geniculatus L. | H. L. Mason 764 | 29 May 1949 | United States of America | California | Modoc Co. 2 miles east… | — |
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| Juncus bufonius L. | H. L. Mason 14030 | 07 Jul 1949 | United States of America | California | San Mateo Co. Mouth of… | — |
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| Juncus hemiendytus F.J.Herm. var. hemiendytus | H. L. Mason 14037 | 05 Apr 1950 | United States of America | California | Lake Co. End of road… | — |
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| Darlingtonia californica Torr. | H. L. Mason 14050 | 15 Jul 1950 | United States of America | California | Trinity Co. Summit of grade,… | — |
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| Nothochelone nemorosa (Douglas ex Lindl.) Straw | H. L. Mason 14062 | 16 Jul 1950 | United States of America | California | Siskiyou Co. Road from Happy… | — |
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| Cirsium scariosum Nutt. | H. L. Mason 14334 | 11 Jul 1952 | United States of America | California | Nevada Co. Sage Hen Creek.… | — |
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| Psilocarphus brevissimus Nutt. | H. L. Mason 14390 | 17 Jul 1952 | United States of America | California | Plumas Co. Sierra Nevada. Sierra… | — |
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| Penstemon gracilentus A.Gray | H. L. Mason 14394 | 18 Jul 1952 | United States of America | California | Nevada Co. Sage Hen Creek | — |
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| Drepanocladus polycarpon (Blandow ex Voit) Warnst. | H. L. Mason 14492 | 16 Aug 1952 | United States of America | California | Nevada Co. Meadow opposite University… | — | ||||
| Meesia triquetra (L. ex Jolycl.) Ångstr. | H. L. Mason 14493 | 16 Aug 1952 | United States of America | California | Opposite University of California Trout… | — | ||||
| Elatine gracilis H.Mason | H. L. Mason 14494 | 17 Aug 1952 | United States of America | California | Sierra Co. 0.4 mile south… | isotype |
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| Puccinia angustata Peck | H. L. Mason s.n. | 13 Nov 1952 | United States of America | California | Marin Co. Tomales Point | — |
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| Puccinia angustata Peck | H. L. Mason s.n. | 13 Nov 1952 | United States of America | California | Marin Co. Tomales Point | — |
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| Gratiola heterosepala H.Mason & Bacig. | H. L. Mason 14544 | 08 Jun 1953 | United States of America | California | Lake Co. Southwest margin of… | isotype |
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| Spirodela polyrhiza (L.) Schleid. | H. L. Mason 14630 | 08 Jun 1955 | United States of America | California | Shasta Co. In a marsh… | — |
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| Alisma geyeri Torr. | H. L. Mason 14647 | 13 Aug 1955 | United States of America | California | Lassen Co. Willow Creek Valley. | — |
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| Potamogeton striatus Ruiz & Pav. | H. L. Mason 14648 | 14 Aug 1955 | United States of America | California | Modoc Co. Plants floating near… | — |
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| Polygonum kelloggii var. watsonii (S.Watson) Reveal | H. L. Mason 14706 | 21 Jun 1957 | United States of America | California | Modoc Co. West side of… | — |
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| Eisenia masonii Setch. & N.L.Gardner | H. L. Mason 5 | Apr | Guadeloupe | — | isotype |
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| Sargassum palmeri Grunow | H. L. Mason 1 | — | — | — | Guadalupe Island | — |
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| Lyngbya erecta N.L.Gardner | H. L. Mason 163 | s.d. | Mexico | Colima | Clarion island, Revillagigedo islands | type |
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| Symploca microdonta Setch. & N.L.Gardner | H. L. Mason 78 | s.d. | Mexico | Baja California | Ensenada Mun. Guadalupe Island | type |
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