Displaying 1 - 15 out of 15 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Agaricus placomyces Peck | E. W. Mason s.n. | 16 Aug 1941 | United States of America | Pennsylvania | Allegheny Co. Grafton | — |
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| Calycoseris wrightii A.Gray | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. 1 mile south… | — |
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| Chorizanthe rigida (Torr.) Torr. & A.Gray | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. At side of… | — |
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| Coleogyne ramosissima Torr. | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. Rock Valley Validation… | — |
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| Descurainia sophia (L.) Webb ex Prantl | E. W. Mason | 28 Apr 1976 | United States of America | Nevada | Mineral Co. | — |
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| Diaporthe fibrosa (Pers.) Fuckel | E. W. Mason 3077 | 01 Jun 1930 | United Kingdom | — | Arundel | — |
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| Diaporthe syngenesia (Fr.) Fuckel | E. W. Mason 3075 | 17 Aug 1930 | United Kingdom | — | England, Cambridge, Wicken Fen | — |
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| Lycium pallidum Miers | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. About 1½ miles… | — |
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| Machaeranthera tortifolia (Torr. & A.Gray) Cronquist & D.D.Keck | E. W. Mason s.n. | s.d. | United States of America | Nevada | Nye Co. 6.8 miles south… | — |
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| Malacothrix glabrata (A.Gray ex D.C. Eaton) A.Gray | E. W. Mason s.n. | 28 Apr 1976 | United States of America | Nevada | Mineral Co. Vacant lot in… | — |
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| Nicotiana obtusifolia M.Martens & Galeotti | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. Close to U.S.… | — |
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| Penstemon albomarginatus M.E.Jones | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. 8.3 miles south… | — |
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| Psorothamnus fremontii (Torr. ex A.Gray) Barneby | E. W. Mason s.n. | 29 Apr 1976 | United States of America | Nevada | Nye Co. 14 miles south… | — |
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| Sillia ferruginea (Pers.) H.Karst. | E. W. Mason s.n. | 23 May 1957 | United Kingdom | — | Selworthy, Somerset | — |
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| Valsa ambiens (Pers.) Fr. | E. W. Mason s.n. | Jun 1924 | United Kingdom | — | Essex, Great Britain | — |
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