Displaying 1 - 50 out of 379 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Adiantum hispidulum Sw. | P. Rubtzoff 2700 | 17 Jul 1956 | United States of America | Hawaii | Hawaii Co. Kukaiau Ranch. North… | — | 3923809 |
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| Agropyron Gaertn. | P. Rubtzoff 9863 | 14 Oct 1987 | United States of America | California | San Francisco Co. In the… | — | 02144794 |
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| Agropyron repens (L.) P.Beauv. | P. Rubtzoff 9055 | 21 Jun 1977 | United States of America | California | San Mateo Co. "Saddle" area… | — | 1801728 |
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| Agrostis | P. Rubtzoff 7074 | 17 Jul 1973 | United States of America | California | El Dorado Co. Blodgett Forest:… | — | 1801731 |
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| Agrostis | P. Rubtzoff 5408 | 22 Jul 1964 | United States of America | California | Mendocino Co. Navarro River bottom,… | — | 1801733 |
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| Agrostis | P. Rubtzoff 10189 | 13 Jul 1990 | United States of America | California | San Francisco Co. Sunset District,… | — | 02064088 |
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| Agrostis | P. Rubtzoff 6580 | 29 Jun 1971 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 02704026 |
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| Agrostis | P. Rubtzoff 5889 | 19 Jun 1968 | United States of America | California | Sonoma Co. Forest Hills (5.5… | — | 02704025 |
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| Agrostis exarata Trin. | P. Rubtzoff 533 | 22 Jul 1951 | United States of America | California | Sonoma Co. Uppermost part of… | — | 1555110 |
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| Agrostis oregonensis Vasey | P. Rubtzoff 254 | 16 Jun 1951 | United States of America | California | Sonoma Co. Uppermost part of… | — | 1556550 |
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| Agrostis tenuis Sibth. | P. Rubtzoff 9223 | 08 Jul 1978 | United States of America | California | San Mateo Co. "Saddle" area… | — | 1801730 |
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| Aira caryophyllea L. | P. Rubtzoff 119 | 07 Jun 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 1637448 |
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| Alisma lanceolatum With. | P. Rubtzoff 4189 | 27 Jun 1959 | United States of America | California | Sonoma Co. Laguna de santa… | — | 3718307 |
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| Alnus | P. Rubtzoff 7338 | 10 Oct 1973 | United States of America | California | Sonoma Co. Salmon Creek, 0.25… | — | 2475283 |
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| Alnus | P. Rubtzoff 6118 | 21 Jul 1969 | United States of America | California | Sonoma Co. Duncan Mills Marsh.… | — | 2475284 |
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| Alnus rhombifolia Nutt. | P. Rubtzoff 7028 | 18 Oct 1972 | United States of America | California | El Dorado Co. U.C. Blodgett… | — | 2472589 |
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| Alnus rubra Bong. | P. Rubtzoff 5836 | 09 Nov 1966 | United States of America | California | Sonoma Co. Sonoma County Marshes.… | — | 2472452 |
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| Alopecurus aequalis Sobol. | P. Rubtzoff 3332 | 11 May 1957 | United States of America | California | Sonoma Co. | — | 1637829 |
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| Alopecurus L. | P. Rubtzoff 9811 | 23 Jul 1987 | United States of America | California | San Francisco Co. 191 Wawona… | — | 02144797 |
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| Amaranthus californicus (Moq.) S.Watson | P. Rubtzoff 5826 | 25 Sep 1966 | United States of America | California | Sonoma Co. Laguna de Santa… | — | 3363576 |
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| Amaranthus powellii S.Watson | P. Rubtzoff 6002 | 21 Nov 1968 | United States of America | California | Mendocino Co. Russian River beach… | — | 3364469 |
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| Andropogon | P. Rubtzoff 7935 | 11 Oct 1974 | United States of America | California | El Dorado Co. About 1… | — | 02144798 |
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| Andropogon virginicus L. | P. Rubtzoff 849 | 24 Nov 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 1640385 |
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| Athyrium filix-femina subsp. cyclosorum (Rupr.) C.Chr. | P. Rubtzoff 4996 | 14 Jul 1962 | United States of America | California | Sonoma Co. Lower Salmon Creek… | — | 3798147 |
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| Athyrium filix-femina subsp. cyclosorum (Rupr.) C.Chr. | P. Rubtzoff 411 | 08 Jul 1951 | United States of America | California | Sonoma Co. Northern half of… | — | 3798148 |
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| Athyrium filix-femina subsp. cyclosorum (Rupr.) C.Chr. | P. Rubtzoff 9144 | 24 Nov 1977 | United States of America | California | San Mateo Co. "Saddle" area… | — | 3798161 |
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| Athyrium filix-femina subsp. cyclosorum (Rupr.) C.Chr. | P. Rubtzoff 2507 | 27 May 1956 | United States of America | California | San Francisco Co. San Miguel… | — | 3798146 |
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| Baccharis | P. Rubtzoff 9220 | 01 Jul 1978 | United States of America | California | Mendocino Co. Along Russian River… | — | 02721512 |
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| Baccharis douglasii DC. | P. Rubtzoff 604 | 05 Aug 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 1899215 |
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| Berula erecta (Huds.) Coville | P. Rubtzoff 1709 | 13 Aug 1954 | United States of America | California | Sonoma Co. Bodega Head Marsh. | — | 3366675 |
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| Berula erecta (Huds.) Coville | P. Rubtzoff 643 | 19 Aug 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 3366670 |
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| Brachythecium frigidum (Müll.Hal.) Besch. | P. Rubtzoff 7982 | 27 May 1975 | United States of America | California | El Dorado Co. Blodgett Forest:… | — | 2135914 | ||
| Briza maxima L. | P. Rubtzoff 1098 | 31 May 1952 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 1631294 |
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| Briza minor L. | P. Rubtzoff 154 | 09 Jun 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 1631416 |
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| Bromus | P. Rubtzoff 10145 | 21 May 1990 | United States of America | California | San Francisco Co. Sunset District,… | — | 02064091 |
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| Bromus hordeaceus L. | P. Rubtzoff 483 | 21 Jul 1951 | United States of America | California | Sonoma Co. Southern half of… | — | 1635959 |
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| Bromus hordeaceus L. | P. Rubtzoff 8634 | 13 Jun 1976 | United States of America | California | San Mateo Co. "Saddle" area… | — | 1801726 |
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| Calamagrostis | P. Rubtzoff 6537 | 10 Jun 1971 | United States of America | California | Sonoma Co. Ptkin Marsh, near… | — | 02064094 |
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| Callitriche longipedunculata Morong | P. Rubtzoff 8485 | 29 Apr 1976 | United States of America | California | Madera Co. On south side… | — | 409589 |
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| Callitriche verna L. | P. Rubtzoff 4896A | 13 Jun 1962 | United States of America | California | Sonoma Co. Freestone Marsh. | — | 4214434 |
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| Calycanthus occidentalis Hook. & Arn. | P. Rubtzoff 9446 | 26 May 1980 | United States of America | California | Sonoma Co. Russian River at… | — | 4212892 |
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| Camassia quamash subsp. linearis Gould | P. Rubtzoff 82 | 28 May 1951 | United States of America | California | Sonoma Co. Western branch of… | — | 3544836 |
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| Campanula californica (Kellogg) A.Heller | P. Rubtzoff 333 | 01 Jul 1951 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 3728438 |
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| Carex | P. Rubtzoff 10163 | 08 Jun 1990 | United States of America | California | San Francisco Co. Golden Gate… | — | 02423500 |
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| Carex athrostachya Olney | P. Rubtzoff 4395 | 20 May 1960 | United States of America | California | Laguna de Santa Rosa east… | — | 2237074 |
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| Carex athrostachya Olney | P. Rubtzoff 4426 | 29 May 1960 | United States of America | California | Sonoma Co. Laguna de Santa… | — | 2237075 |
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| Carex athrostachya Olney | P. Rubtzoff 3734 | 05 Jul 1958 | United States of America | California | Sonoma Co. Atascadero Creek Marsh. | — | 2237076 |
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| Carex buxbaumii Wahlenb. | P. Rubtzoff 1004 | 10 May 1952 | United States of America | California | Sonoma Co. Pitkin Marsh, near… | — | 2253283 |
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| Carex comosa Boott | P. Rubtzoff 9651 | 27 Jun 1981 | United States of America | California | Santa Cruz Co. Whites Lagoon,… | — | 2259790 |
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| Carex cusickii Mack. | P. Rubtzoff 189 | 10 Jun 1951 | United States of America | California | Sonoma Co. Norther half of… | — | 2261798 |
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