Displaying 51 - 125 out of 298 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Sargassum insulare Setch. & N.L.Gardner | I. M. Johnston s.n. | Jun 1921 | Mexico | Baja California | San Marcos Island | probable type |
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| Clidemia octona (Bonpl.) L.O.Williams | I. M. Johnston 1349 | 07 Feb 1946 | Panama | — | San Jose Island, Perlas archipelago,… | — | ||||
| Clidemia rubra (Aubl.) Mart. | I. M. Johnston 34 | 06 Oct 1944 | Panama | — | San Jose Island, Perlas archipelago,… | — | ||||
| Cryptantha crassisepala (Torr. & A.Gray) Greene | I. M. Johnston 3309 | 15 Jun 1944 | United States of America | Utah | Grand Co. Desert Valley, northwest… | — |
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| Plagiobothrys mollis (A.Gray) I.M.Johnst. | I. M. Johnston 11978 | 10 Jul 1935 | United States of America | Oregon | Harney Co. Moist field just… | — |
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| Plagiobothrys scouleri var. penicillatus (Greene) Cronquist | I. M. Johnston 2152 | 21 Jun 1940 | United States of America | Idaho | Owyhee Co. Cow Creek, Idaho;… | — |
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| Prosopis articulata S.Watson | I. M. Johnston 3434 | 5 May 1921 | Mexico | Baja California | Los Angeles Bay | — | ||||
| Ebenopsis confinis (Standl.) Barneby & J.W.Grimes | I. M. Johnston 3498 | 8 May 1921 | Mexico | Baja California | Las Animas Bay | — |
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| Psathyrotes ramosissima (Torr.) A.Gray | I. M. Johnston 3340 | 29 Apr 1921 | Mexico | Baja California | San Luis Gonzalez Bay | — |
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| Perityle crassifolia var. robusta (Rydb.) Everly | I. M. Johnston 3893 | 26 May 1921 | Mexico | Baja California | Baja California | — | ||||
| Pelucha trifida S.Watson | I. M. Johnston 3508 | 8 May 1921 | Mexico | Baja California | Las Animas Bay | — | ||||
| Peucephyllum schottii A.Gray | I. M. Johnston 3375 | 1 May 1921 | Mexico | Baja California Sur | Mulege. San Marcos Island Puerto… | — | ||||
| Perityle crassifolia var. robusta (Rydb.) Everly | I. M. Johnston 4081 | 9 Jun 1921 | Mexico | Baja California Sur | Espiritu Santo Island, Candeleros bay | — | ||||
| Lysiloma candidum Brandegee | I. M. Johnston 3613 | 12 May 1921 | Mexico | Baja California Sur | San Marcos Island, B. C.… | — |
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| Palafoxia linearis (Cav.) Lag. var. linearis | I. M. Johnston 3866 | 24 May 1921 | Mexico | Baja California Sur | Monserrate Island (Ensenada Blanca) | — | ||||
| Acacia willardiana Rose | I. M. Johnston 3125 | 17 Apr 1921 | Mexico | Sonora | San Pedro Nolasco | — | ||||
| Pelucha trifida S.Watson | I. M. Johnston 3151 | 18 Apr 1921 | Mexico | Sonora | San Pedro Martir Island | — | ||||
| Palafoxia linearis var. glandulosa B.L.Turner & M.I.Morris | I. M. Johnston 3264 | 23 Apr 1921 | Mexico | Sonora | Tiburon Island, Freshwater Bay | — | ||||
| Machaeranthera pinnatifida (Hook.) Shinners | I. M. Johnston 3930 | 27 May 1921 | Mexico | Baja California Sur | San Diego Island | — |
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| Eragrostis pectinacea var. miserrima (E.Fourn.) Reeder | I. M. Johnston 7786 | 19 Sep 1938 | Mexico | Durango | Road from Bermejillo to Zaragoza… | — |
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| Astragalus lentiginosus var. coachellae Barneby | I. M. Johnston 1065 | 04 Apr 1917 - 06 Apr 1917 | United States of America | California | Whitewater | — |
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| Bursera microphylla A.Gray | I. M. Johnston 4168 | 18 Jun 1921 | Mexico | — | Coyote Bay, Concepcion Bay. | — |
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| Bursera microphylla A.Gray | I. M. Johnston 3186 | 19 Apr 1921 | Mexico | Sonora | San Esteban Island | — | ||||
| Monardella australis subsp. jokerstii Elvin & A.C.Sanders | I. M. Johnston 5118 | 22 Jul 1925 | United States of America | California | San Bernardino Co. Cucamonga Peak,… | paratype |
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| Clidemia octona (Bonpl.) L.O.Williams | I. M. Johnston 1027 | 03 Jan 1946 | Panama | — | San Jose Island, Perlas archipelago,… | — |
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| Errazurizia megacarpa (S.Watson) I.M.Johnst. | I. M. Johnston 3294 | 25 Apr 1921 | Mexico | Sonora | Gulf of California, Tepoca Bay | — | ||||
| Errazurizia megacarpa (S.Watson) I.M.Johnst. | I. M. Johnston 3348 | 29 Apr 1921 | Mexico | Baja California | San Luis Gonzales Bay | — |
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| Errazurizia megacarpa (S.Watson) I.M.Johnst. | I. M. Johnston 3579 | 10 May 1921 | Mexico | Baja California | San Francisquito Bay | — | ||||
| Marina parryi (Torr. & A.Gray) Barneby | I. M. Johnston 3948 | 30 May 1921 | Mexico | — | San Francisco Island, Gulf of… | — | ||||
| Marina parryi (Torr. & A.Gray) Barneby | I. M. Johnston 3187 | 19 Apr 1921 | Mexico | — | Gulf of California, San Esteban… | — | ||||
| Psorothamnus emoryi var. arenarius (Brandegee) Barneby | I. M. Johnston 3715 | 16 May 1921 | Mexico | Baja California | San Nicholas Bay | — | ||||
| Psorothamnus emoryi var. arenarius (Brandegee) Barneby | I. M. Johnston 4286 | 05 Jul 1921 | Mexico | Sonora | Kino Pt. | — | ||||
| Miconia argentea (Sw.) DC. | I. M. Johnston 535 | 24 Mar 1945 | Panama | — | San Jose Island, Perlas archipelago,… | — |
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| Miconia hyperprasina Naudin | I. M. Johnston 1133 | 14 Jan 1945 | Panama | — | San Jose Island, Perlas archipelago,… | — |
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| Physalis crassifolia var. infundibularis I.M.Johnst. | I. M. Johnston 3325 | April 29, 1921 | Mexico | Baja California | San Luis Gonzalez Bay | — |
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| Achnatherum occidentale (Thurb. ex S.Watson) Barkworth | I. M. Johnston 1504 | 2000 | United States of America | California | Kelly's Cabin (Ontario Pk). Canadian… | — |
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| Agrostis exarata Trin. | I. M. Johnston 1510 | 28 Jul 1917 | United States of America | California | San Antonio Mountains. | — |
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| Agrostis idahoensis Nash | I. M. Johnston 1522 | 30 Jul 1917 | United States of America | California | Kelly's cabin, Ontario Peak. Upper… | — |
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| Bouteloua chasei Swallen | I. M. Johnston 7592 | Sept. 11-12, 1938 | Mexico | San Luis Potosí | Road from Matehuala north to… | — |
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| Bouteloua dactyloides (Nutt.) Columbus | I. M. Johnston 7428 | Sept. 4-5, 1938 | Mexico | Zacatecas | Road from Sierra Hermosa southwest… | — |
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| Jouvea pilosa (J.Presl) Scribn. | I. M. Johnston 3825 | 23 May 1921 | Mexico | Baja California Sur | Carmen Island: San Francisco Bay | — |
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| Muhlenbergia alopecuroides (Griseb.) P.M.Peterson & Columbus | I. M. Johnston 460 | August 20-26, 1940 | Mexico | Coahuila | End of road from T.… | — |
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| Paspalum distichum L. | I. M. Johnston 3668 | 14 May 1921 | United States of America | California | back of Typha clumps along… | — |
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| Coriolopsis gallica (Fr.) Ryvarden | I. M. Johnston 1771 | 04 Apr 1917 | United States of America | California | Riverside Co. Claremont, Andreas Canyon… | — |
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| Cryptoporus volvatus (Peck) Shear | I. M. Johnston 111 | 28 Nov 1918 | United States of America | California | Los Angeles Co. Claremont | — |
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| Sapium biloculare var. amplum I.M.Johnst. | I. M. Johnston 3772 | 19 May 1921 | Mexico | Baja California | Loreto | isotype |
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| Grateloupia prolongata J.Agardh | I. M. Johnston 87 | 02 Jul 1921 | Mexico | Baja California Sur | Isla Partida | — |
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| Carex bella L.H.Bailey | I. M. Johnston A-90 | 08 Aug 1919 | United States of America | Colorado | El Paso Co. Pikes Peak,… | — |
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| Carex globosa Boott | I. M. Johnston 2132 | 01 Sep 1918 | United States of America | California | San Antonio Mountains. Upper Sonoran… | — |
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| Carex lanuginosa Michx. | I. M. Johnston s.n. | 13 May 1917 | United States of America | California | Los Angeles Co. El Monte | — |
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| Carex multicaulis L.H.Bailey | I. M. Johnston 1426 | 04 Jul 1917 | United States of America | California | San Antonio Mountains; Bear Cañon | — |
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| Carex multicaulis L.H.Bailey | I. M. Johnston 1738 | 15 Jul 1917 | United States of America | California | Day Cañon, San Antonio Mountains | — |
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| Carex praegracilis W.Boott | I. M. Johnston s.n. | 08 Jul 1917 | — | — | Mojave Desert. Near Victorville. | — |
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| Carex cryptosperma Zika, D.S.Bell & L. J. Gross | I. M. Johnston s.n. | 05 Jul 1924 | United States of America | California | San Bernardino Co. Bluff Lake,… | — |
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| Carex subfusca W.Boott | I. M. Johnston 1636 | 23 Aug 1917 | United States of America | California | Pine Mt. | — |
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| Carex subfusca W.Boott | I. M. Johnston 1393 | 03 Jul 1917 | United States of America | California | Coldwater Fk. of Lytle Creek | — |
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| Trametes hirsuta (Wulfen:Fr.) Lloyd | I. M. Johnston 217 | 17 Nov 1918 | United States of America | California | Evey Canyon, San Antonio Mts,… | — |
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| Trametes hirsuta (Wulfen:Fr.) Lloyd | I. M. Johnston s.n. | 08 Dec 1918 | United States of America | California | Stoddard Canyon, San Antonio Mts | — |
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| Carex triquetra Boott | I. M. Johnston 1917 | 06 May 1917 | United States of America | California | Evey Cañon | — |
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| Agaricus campestris L.:Fr. | I. M. Johnston 1 | 01 Dec 1918 | United States of America | California | Evey Canyon, San Antonio Mts,… | — |
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| Sabal uresana Trel. | I. M. Johnston 4345 | 08 Jul 1921 | Mexico | Sonora | San Carlos Bay. Small colony… | — |
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| Armillaria putrida (Scop.) Murrill | I. M. Johnston 33 | 22 Dec 1918 | United States of America | California | Los Angeles Co. Claremont | — |
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| Astraeus hygrometricus (Pers.) Morgan | I. M. Johnston s.n. | 07 Dec 1925 | Chile | Antofagasta | El Rincon, just north of… | — |
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| Geastrum recolligens (J.Sowerby) Desv. | I. M. Johnston s.n. | 05 Dec 1925 | Chile | — | Prov. Antofagasto, Dept. Taltal. Aguada… | — |
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| Arctostaphylos tomentosa (Pursh) Lindl. | I. M. Johnston s.n. | 13 Aug 1924 | United States of America | California | Sunset Trail, 1.5 mi S… | — |
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| Henriettea succosa (Aubl.) DC. | I. M. Johnston 740 | 19 Apr 1945 | Panama | — | San Jose Island, Pearl Archipelago,… | — |
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| Tulostoma jourdani Pat. | I. M. Johnston s.n. | 05 Dec 1925 | Chile | Antofagasta | along trail to the old… | — |
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| Tulostoma poculatum V.S.White | I. M. Johnston s.n. | 08 Jul 1957 | United States of America | Texas | Aransas Co. 10 miles north… | — |
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| Lupinus arizonicus (S.Watson) S.Watson | I. M. Johnston 3635 | 12 May 1921 | United States of America | California | The Gulf of California. San… | — |
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| Calyptranthes johnstonii McVaugh | I. M. Johnston 1764 | 01 Apr 1956 | Panama | — | Canal Zone: Northwestern part of… | isotype |
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| Clidemia octona (Bonpl.) L.O.Williams | I. M. Johnston 75 | 9 Oct 1944 | Panama | Panamá | M - Area Road; San… | — |
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| Leandra mexicana (Naudin) Cogn. | I. M. Johnston 461 | 11 Nov 1944 | Panama | Panamá | Little Butch trail, San Jose… | — |
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| Miconia prasina (Sw.) DC. | I. M. Johnston 760 | 23 Apr 1945 | Panama | — | San Jose Island, Perlas archipelago,… | — |
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| Miconia prasina (Sw.) DC. | I. M. Johnston 770 | 24 Apr 1945 | Panama | — | Bald Hill Road. San Jose… | — |
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| Miconia prasina (Sw.) DC. | I. M. Johnston 1111 | 11 Jan 1946 | Panama | — | South Road along area 2A.… | — |
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