Displaying 1 - 75 out of 2574 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abies lowiana (Gordon) A.Murray bis | J. T. Howell 47146 | 30 Jul 1974 | United States of America | California | Tulare Co. Kern Plateau. Southwest… | — |
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| Abies magnifica var. shastensis Lemmon | J. T. Howell 38843 | 24 Sep 1962 | United States of America | California | Kern Co. Sierra Nevada. North… | — |
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| Abronia latifolia Eschsch. | J. T. Howell 23158 | 14 May 1947 | United States of America | California | Marin Co. McClure Beach | — |
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| Abronia maritima Nutt. ex S.Watson | J. T. Howell 8230 | 13 Mar 1932 | United States of America | California | Ventura Co. San Nicolas Island | — |
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| Abronia turbinata Torr. ex S.Watson | J. T. Howell 54604 | 14 Aug 1981 | United States of America | California | Mono Co. Pumice Flats, Deadman… | — |
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| Abronia umbellata Lam. | J. T. Howell 23157 | 14 May 1947 | United States of America | California | Marin Co. McClure Beach. | — |
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| Acalypha parvula Hook.f. | J. T. Howell 9893 | 09 Jun 1932 | Ecuador | Galápagos | North side of Indfatigable Island | — |
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| Acalypha parvula Hook.f. | J. T. Howell 9723 | 05 Jun 1932 | Ecuador | Galápagos | James Bay, James Island. Among… | — |
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| Acalypha parvula Hook.f. | J. T. Howell 10038 | 13 Jun 1932 | Ecuador | Galápagos | Sulivan Bay, James Island. | — |
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| Acalypha parvula Hook.f. | J. T. Howell 7948 | 06 Jun 1932 | Ecuador | Galápagos | Jervis Island | — |
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| Acalypha parvula Hook.f. | J. T. Howell 9139 | 07 May 1932 | Ecuador | Galápagos | Indefatigable Island. Trail to Fortuna.… | — |
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| Acalypha parvula Hook.f. | J. T. Howell 9345 | 15 May 1932 | Ecuador | Galápagos | Summit of Floreana Peak, Charles… | — |
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| Acamptopappus sphaerocephalus var. hirtellus S.F.Blake | J. T. Howell 2492 | 11 Jun 1927 | United States of America | California | San Bernardino Co. Between Cajon… | — |
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| Acer glabrum var. torreyi (Greene) Smiley | J. T. Howell 27700 | 28 Jul 1951 | United States of America | California | Plumas Co. Eureka Peak | — |
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| Achillea millefolium L. | J. T. Howell 38473 | 10 Jul 1962 | United States of America | California | Kern Co. Greenhorn Mountains, Shirley… | — |
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| Achillea millefolium L. | J. T. Howell 12573 | 23 Sep 1934 | United States of America | California | Solano Co. Suisun Marshes at… | — |
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| Achnatherum coronatum (Thurb.) Barkworth | J. T. Howell 51789 | 19 May 1976 | United States of America | California | Kern Co. 3.8 miles above… | — |
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| Achnatherum hymenoides (Roem. & Schult.) Barkworth | J. T. Howell 27880 | 18 Jul 1951 | United States of America | California | Tulare Co. Franklin Pass Trail. | — |
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| Achnatherum latiglume (Swallen) Barkworth | J. T. Howell 38394 | 09 Jul 1962 | United States of America | California | Kern Co. Near Park Headquarters,… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 30766 | 19 Jul 1955 | United States of America | California | Plumas Co. Slope at edge… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 27745 | 29 Jun 1951 | United States of America | California | Plumas Co. Spring Garden Creek. | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 47154 | 30 Jul 1970 | United States of America | California | Tulare Co. Southwest end of… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 37775 | 18 Jun 1962 | United States of America | California | Plumas Co. Sierra Valley near… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 52026 | 20 Jul 1976 | United States of America | California | Lassen Co. Along Willard Creek… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 29542 | 13 May 1954 | United States of America | California | Sierra Co. North Fork Yuba… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 52004 | 20 Jul 1976 | United States of America | California | Lassen Co. About 5 miles… | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 30766 | 19 Jul 1955 | United States of America | California | Plumas Co. Beckwourth. | — |
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| Achnatherum lemmonii (Vasey) Barkworth | J. T. Howell 35342 | 06 Jun 1960 | United States of America | California | Fresno Co. Copper Creek Trail,… | — |
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| Achnatherum nevadense (B.L.Johnson) Barkworth | J. T. Howell 15808 | 01 Aug 1940 | United States of America | California | Tulare Co. Between Reflection Lake… | — |
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| Achnatherum nevadense (B.L.Johnson) Barkworth | J. T. Howell 4415 | 16 Jul 1968 | United States of America | California | Mono Co. Road from Virginia… | — |
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| Achnatherum nevadense (B.L.Johnson) Barkworth | J. T. Howell 12273 | 30 Jun 1934 | United States of America | California | Modoc Co. Duncan Horse Camp | — |
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| Achnatherum nevadense (B.L.Johnson) Barkworth | J. T. Howell 12535 | 10 Jul 1934 | United States of America | California | Lassen Co. Between Harvey Valley… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 34447 | 14 Aug 1958 | United States of America | California | Madera Co. Summit of ridge… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 50069 | 01 Aug 1973 | United States of America | California | Lassen Co. Canadian Zone forest,… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 39829 | 11 Jul 1963 | United States of America | California | Nevada Co. 3 miles northeast… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 35341A | 06 Jun 1960 | United States of America | California | Fresno Co. Copper Creek Trail,… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 42721 | 23 Jun 1967 | United States of America | California | Plumas Co. Canyon of the… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 48342 | 13 Jul 1971 | United States of America | California | Tulare Co. Northeast end of… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 37840 | 19 Jun 1962 | United States of America | California | Plumas Co. The Buttes, n.… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 50195 | 01 Aug 1973 | United States of America | California | Plumas Co. Transition forest ca.… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 47962 | 16 Jun 1971 | United States of America | California | Kern Co. 1.7 miles east… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 49631 | 29 Jun 1973 | United States of America | Nevada | Washoe Co. Bull Ranch Creek… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 35341 | 06 Jun 1960 | United States of America | California | Fresno Co. Copper Creek Trail,… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 43101 | 05 Jul 1967 | United States of America | California | Tulare Co. 2.5 miles north… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 50864 | 13 Aug 1974 | United States of America | Nevada | Douglas Co. Slope of Genoa… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 41680 | 11 Jul 1966 | United States of America | California | Tulare Co. Poison Meadow, Kern… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 39852 | 12 Jul 1963 | United States of America | California | El Dorado Co. Open sandy… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 38475 | 10 Jul 1962 | United States of America | California | Kern Co. Shirley Meadows, Greenhorn… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 7116 | 01 Jul 1931 | United States of America | Oregon | Deschutes Co. 5 miles S.… | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | J. T. Howell 49191 | 12 May 1973 | United States of America | California | Lassen Co. Elysian Valley northwest… | — |
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| Achnatherum pinetorum (M.E.Jones) Barkworth | J. T. Howell 27858 | 17 Jul 1951 | United States of America | California | Tulare Co. White Chief Trail.… | — |
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| Achnatherum pinetorum (M.E.Jones) Barkworth | J. T. Howell 22764 | 26 Jul 1946 | United States of America | California | Inyo Co. Mono Mesa. | — |
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| Achnatherum thurberianum (Piper) Barkworth | J. T. Howell 48147 | 28 Jun 1971 | United States of America | Nevada | Washoe Co. Steamboat Springs | — |
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| Achnatherum webberi (Thurb.) Barkworth | J. T. Howell 50122 | 31 Jul 1973 | United States of America | California | Plumas Co. Canadian Zone forest,… | — |
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| Achnatherum webberi (Thurb.) Barkworth | J. T. Howell 50679 | 30 Jul 1974 | United States of America | California | Lassen Co. Summit ridge of… | — |
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| Achnatherum x bloomeri (Bol.) Barkworth | J. T. Howell 27882 | 18 Jul 1951 | United States of America | California | Tulare Co. Franklin Pass Trail.… | — |
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| Aconitum columbianum Nutt. var. columbianum | J. T. Howell 54509 | 12 Aug 1981 | United States of America | California | Mono Co. Sierra Nevada. Rock… | — |
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| Aconogonon phytolaccifolium (Meisn. ex Small) Rydb. | J. T. Howell 52137 | 03 Aug 1976 | United States of America | Nevada | Carson City (Independent City). Ormsby… | — |
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| Adiantum capillus-veneris L. | J. T. Howell 30135 | 03 Nov 1954 | United States of America | California | Monterey Co. Arroyo Seco River… | — |
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| Adiantum jordanii C.H.Müll. | J. T. Howell 52806 | 05 Apr 1978 | United States of America | California | Calaveras Co. Camp Nine Road… | — |
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| Agoseris aurantiaca (Hook.) Greene var. aurantiaca | J. T. Howell 7536 | 23 Jul 1931 | United States of America | Washington | Clallam Co. Mt. Angeles | — |
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| Agoseris aurantiaca (Hook.) Greene var. aurantiaca | J. T. Howell 11937 | 11 Jun 1934 | United States of America | California | Modoc Co. Parker Creek; Warner… | — |
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| Agoseris grandiflora (Nutt.) Greene var. grandiflora | J. T. Howell 14660 | 14 May 1939 | United States of America | California | Marin Co. Ross | — |
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| Agoseris heterophylla (Nutt.) Greene | J. T. Howell 39409 | 04 Jun 1963 | United States of America | Nevada | Plumas, Marble Hot Springs, Sierra… | — |
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| Agoseris heterophylla (Nutt.) Greene var. heterophylla | J. T. Howell 12013 | 12 Jun 1934 | United States of America | California | Modoc Co. Between Davis Creek… | — |
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| Agoseris heterophylla (Nutt.) Greene var. heterophylla | J. T. Howell 11260 | 14 May 1933 | United States of America | California | Contra Costa Co. Hills east… | — |
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| Agoseris heterophylla (Nutt.) Greene var. heterophylla | J. T. Howell 11191 | 30 Apr 1933 | United States of America | California | Marin Co. North side of… | — |
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| Agoseris heterophylla (Nutt.) Greene var. heterophylla | J. T. Howell 23125 | 04 May 1947 | United States of America | California | Marin Co. San Rafael Hills. | — |
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| Agoseris monticola Greene | J. T. Howell 48756 | 13 May 1972 | United States of America | Nevada | Washoe Co. 2.9 mi. by… | — |
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| Agoseris parviflora (Nutt.) D.Dietr. | J. T. Howell 5546 | 14 Jul 1970 | United States of America | California | Sierra Co. Verdi Peak Lookout,… | — |
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| Agoseris parviflora (Nutt.) D.Dietr. | J. T. Howell 12115 | 14 Jun 1934 | United States of America | California | Modoc Co. Near Lost Lake;… | — |
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| Agropyron desertorum (Fisch. ex Link) Schult. | J. T. Howell 53708 | 28 May 1980 | United States of America | California | Plumas Co. North Fork Feather… | — |
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| Agrostis aristiglumis Swallen | J. T. Howell 1411 | 14 May 1947 | United States of America | California | Marin Co. Drakes Estero, WNW… | isotype |
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| Agrostis blasdalei Hitchc. | J. T. Howell 29110 | 16 Jul 1953 | United States of America | California | Mendocino Co. 1 mile north… | — |
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| Agrostis blasdalei Hitchc. | J. T. Howell 23150 | 14 May 1947 | United States of America | California | Marin Co. Monterey Series, Drakes… | — |
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