Displaying 1 - 75 out of 31244 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Senna macranthera var. micans (Nees) H.S.Irwin & Barneby | H. S. Irwin 32448 | 18 Feb 1871 | Brazil | Bahia | Morro do Chapéu Mun. Serra… | — | 582962 |
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| Tillandsia streptocarpa Baker | H. S. Irwin 24612 | 17 Mar 1909 | Brazil | Goias | 60 km north of Veadeiros | — | 4199732 |
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| Athyrium thelypterioides (Michx.) Desv. | I. W. Knobloch s.n. | 12 Aug 1929 | United States of America | New York | Camp Ti-Wa-Ya-Ee, Holland | — | 3798275 |
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| Polystichum acrostichoides (Michx.) Schott | I. W. Knobloch s.n. | 07 Jun 1930 | United States of America | New York | Hamburg | — | 3539183 |
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| Baccharis oxyodonta DC. | H. S. Irwin 4835 | 03 Jul 1930 | Brazil | Minas Gerais | Viçosa Mun. Agricultural College lands;… | — | 00855004 |
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| Baccharis oxyodonta DC. | H. S. Irwin 5157 | 09 Oct 1930 | Brazil | Minas Gerais | Viçosa Mun. Agricultural College land;… | — | 00855005 |
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| Ptilimnium nuttallii (DC.) Britton | I. W. Knobloch s.n. | 17 Jan 1931 | United States of America | Texas | Lee Co. Lincoln | — | 1163704 |
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| Juniperus scopulorum Sarg. | I. H. Johnson J-87 | 27 Aug 1936 | United States of America | Utah | Iron Co. Dixie Forest | — | 18277 |
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| Chaetopappa ericoides (Torr.) G.L.Nesom | I. H. Johnson J-77 | 27 Aug 1936 | United States of America | Utah | Iron Co. Forest: Dixie. | — | 2035590 |
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| Polemonium occidentale Greene | I. H. Johnson J-132 | 15 Jul 1937 | United States of America | Utah | Kane Co. Forest: Dixie. Slope:… | — | 00963061 |
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| Solidago sparsiflora A.Gray | I. H. Johnson s.n. | 22 Aug 1937 | United States of America | Utah | Washington Co. Dixie Forest. Left… | — | 2371924 |
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| Krascheninnikovia lanata (Pursh) A.Meeuse & A.Smit | I. H. Johnson J153 | 16 Jun 1938 | United States of America | Utah | Washington Co. 4 miles east… | — | 529247 |
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| Vaccinium chihuahuense Wilbur & Luteyn | I. W. Knobloch 5791 | 01 Jun 1939 | Mexico | Chihuahua | Mojarachic [spelling ?]. | isotype | 10631 |
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| Myriopteris tomentosa (Link) Fée | I. W. Knobloch 5946 | 06 Sep 1939 | Mexico | Chihuahua | Recubichic | — | 3895030 |
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| Boerhavia diffusa var. tetrandra L. | I. E. Lane 49-551 | 26 Dec 1949 | United States of America | Hawaii | Hawaii. Sandy banks above bay… | — | 04166041 |
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| Heliotropium curassavicum L. | I. E. Lane 49-550 | 26 Dec 1949 | United States of America | Hawaii | Hawaii. Sandy banks above bay… | — | 04166045 |
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| Cuscuta sandwichiana Choisy | I. E. Lane 49-554 | 1949 | United States of America | Hawaii | Honolua Kawaoa, Kau District. | — | 04166038 |
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| Senna obtusifolia (L.) H.S.Irwin & Barneby | H. S. Irwin 14 | 07 Mar 1953 | Guyana | Demerara-Mahaica | Atkinson Field | — | 1746715 |
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| Endotrichella irwinii E.B.Bartram | M. Irwin 199 | 13 Jan 1954 | Samoa | — | Afiamalu, Upolu | type | 1272664 |
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| Leucobryum samoanum M.Fleisch. | M. Irwin 356 | 26 Sep 1954 | Samoa | — | Western Samoa, Afiamalu, Upolu. | — | 4441621 |
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| Senna bicapsularis (L.) Roxb. var. bicapsularis | H. S. Irwin 503 | 13 Nov 1954 | Guyana | Demerara-Mahaica | Near Clonbrook, East Coast Demerara | — | 1628664 | ||
| Chamaecrista ramosa (Vogel) H.S.Irwin & Barneby var. ramosa | H. S. Irwin 587 | 04 Jan 1955 | Guyana | — | Berbice. Orealla Savannah, 1 mi.… | — | 471326 |
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| Chamaecrista flexuosa (L.) Greene var. flexuosa | H. S. Irwin 592 | 04 Jan 1955 | Guyana | — | Berbice: Orealla Savannah, 1 mi.… | — | 01529264 | ||
| Chamaecrista hispidula (Vahl) H.S.Irwin & Barneby | H. S. Irwin 599 | 04 Jan 1955 | Guyana | — | Berbice: Orealla Savannah, 1 mi.… | — | 01529484 | ||
| Chamaecrista viscosa var. major (Benth.) H.S.Irwin & Barneby | H. S. Irwin 586 | 04 Jan 1955 | Guyana | — | Berbice: Orealla Savannah, 1 mi.… | — | 1581328 |
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| Chamaecrista diphylla (L.) Greene | H. S. Irwin 617 | 05 Jan 1955 | Guyana | — | Berbice: Orealla Savannah, 1 mi.… | — | 1579937 |
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| Senna bacillaris (L.f.) H.S.Irwin & Barneby var. bacillaris | H. S. Irwin 645 | 08 Jan 1955 | Guyana | — | Berbice: Crabwood Creek, 10 mi.… | — | 1628281 |
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| Chamaecrista desvauxii var. mollissima (Benth.) H.S.Irwin & Barneby | H. S. Irwin 656 | 29 Jan 1955 | Guyana | Demerara-Mahaica | 2 mi. E. of Atkinson… | — | 1580493 |
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| Senna latifolia (G.Mey.) H.S.Irwin & Barneby | H. S. Irwin 657 | 29 Jan 1955 | Guyana | Demerara-Mahaica | Atkinson Field, Demerara, on E.… | — | 1745869 | ||
| Urospatha sagittifolia (Rudge) Schott | H. S. Irwin 662 | 19 Feb 1955 | Guyana | Demerara-Mahaica | Border of unnamed creek in… | — | 3804100 |
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| Evolvulus pterocaulon Moric. | H. S. Irwin 903 | 14 Apr 1956 | Guyana | — | Essequibo. Near Lethem | — | 485495 | ||
| Ranunculus abortivus L. | I. A. Ungar 173 | 28 Apr 1957 | United States of America | Kansas | Douglas Co. Kansas Univ. Natural… | — | 2753821 |
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| Chamaecrista fasciculata (Michx.) Greene | H. S. Irwin 1202 | 08 Jun 1957 | United States of America | Texas | Robertson Co. 3 mi. NE… | — | 01454111 |
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| Chamaecrista calycioides (Collad.) Greene var. calycioides | H. S. Irwin 1210 | 15 Jun 1957 | United States of America | Texas | Karnes Co. 2½ mi. S.… | — | 01453541 |
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| Chamaecrista flexuosa var. texana (Buckley) H.S.Irwin & Barneby | H. S. Irwin 1209 | 15 Jun 1957 | United States of America | Texas | Karnes Co. 2 mi. N.… | — | 01454208 |
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| Chamaecrista flexuosa var. texana (Buckley) H.S.Irwin & Barneby | H. S. Irwin 1208 | 15 Jun 1957 | United States of America | Texas | Refugio Co. 8 mi. W.… | — | 01454209 |
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| Chamaecrista chamaecristoides var. cruziana (Britton & Rose) H.S.Irwin & Barneby | H. S. Irwin 1206 | 16 Jun 1957 | United States of America | Texas | Nueces Co. Mustang Island, 10… | — | 01453547 |
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| Chamaecrista fasciculata (Michx.) Greene | H. S. Irwin 1217 | 04 Jul 1957 | United States of America | Texas | Bastrop Co. 3 mi. E.… | — | 01454113 |
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| Chamaecrista fasciculata (Michx.) Greene | H. S. Irwin 1220 | 13 Jul 1957 | United States of America | Texas | La Salle Co. 3 mi.… | — | 01454112 |
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| Chamaecrista fasciculata (Michx.) Greene | H. S. Irwin 1219 | 13 Jul 1957 | United States of America | Texas | La Salle Co. 2 mi.… | — | 01454114 |
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| Senna lindheimeriana (Scheele) H.S.Irwin & Barneby | H. S. Irwin 1226 | 26 Jul 1957 | United States of America | Texas | Brewster Co. Altuda Mt., ca.… | — | 1581989 |
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| Senna orcuttii (Britton & Rose) H.S.Irwin & Barneby | H. S. Irwin 1225 | 26 Jul 1957 | United States of America | Texas | Brewster Co. Limestone slopes of… | — | 1582324 |
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| Senna roemeriana (Scheele) H.S.Irwin & Barneby | H. S. Irwin 1223 | 26 Jul 1957 | United States of America | Texas | Brewster Co. 1 mi. E.… | — | 1582433 |
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| Penstemon campanulatus subsp. chihuahuensis Straw | I. W. Knobloch 323 | 18 Aug 1957 | Mexico | Chihuahua | Majalca, north of Chihuahua | — | 772924 |
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| Chamaecrista greggii (A.Gray) Pollard ex A.Heller var. greggii | H. S. Irwin 1230 | 19 Aug 1957 | Mexico | Nuevo León | Sabinas Hidalgo Mun. 40 mi… | — | 554231 |
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| Chamaecrista greggii (A.Gray) Pollard ex A.Heller var. greggii | H. S. Irwin 1230 | 19 Aug 1957 | Mexico | Nuevo León | Sabinas Hidalgo Mun. 40 mi… | — | 554224 |
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| Senna pilosior (C.B.Rob. ex J.F.Macbr.) H.S.Irwin & Barneby | H. S. Irwin 1231 | 20 Aug 1957 | Mexico | Durango | 6 mi. E of Cuencame,… | — | 1585158 | ||
| Senna durangensis (Rose) H.S.Irwin & Barneby var. durangensis | H. S. Irwin 1234 | 20 Aug 1957 | Mexico | Durango | Cuencamé Mun. 2 mi W… | — | 554932 |
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| Senna hirsuta var. glaberrima (M.E.Jones) H.S.Irwin & Barneby | H. S. Irwin 1247 | 21 Aug 1957 | Mexico | Durango | 5 mi. SE of Guerrero,… | — | 1583411 |
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| Senna crotalarioides (Kunth) H.S.Irwin & Barneby | H. S. Irwin 1236 | 21 Aug 1957 | Mexico | Durango | Pánuco de Coronado Mun. 10… | — | 554884 |
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| Senna occidentalis (L.) Link | H. S. Irwin 1251 | 22 Aug 1957 | Mexico | Jalisco | 21 mi. SW of Jalostitlan,… | — | 1584311 | ||
| Senna crotalarioides (Kunth) H.S.Irwin & Barneby | H. S. Irwin 1248 | 22 Aug 1957 | Mexico | Aguascalientes | Aguascalientes Mun. 1 mi S… | — | 554888 |
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| Senna crotalarioides (Kunth) H.S.Irwin & Barneby | H. S. Irwin 1248 | 22 Aug 1957 | Mexico | Aguascalientes | Aguascalientes Mun. 1 mi S… | — | 554887 |
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| Chamaecrista nictitans var. jaliscensis (Greenm.) H.S.Irwin & Barneby | H. S. Irwin 1270 | 22 Aug 1957 | Mexico | Jalisco | Tequila Mun. 26 mi E… | — | 554323 |
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| Chamaecrista nictitans var. leptadenia (Greenm.) Gandhi & S.L.Hatch | H. S. Irwin 1250 | 22 Aug 1957 | Mexico | Jalisco | Tepatitlán de Morelos Mun. 21… | — | 554543 |
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| Chamaecrista nictitans var. leptadenia (Greenm.) Gandhi & S.L.Hatch | H. S. Irwin 1250 | 22 Aug 1957 | Mexico | Jalisco | Tepatitlán de Morelos Mun. 21… | — | 554542 |
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| Chamaecrista absus var. meonandra (H.S.Irwin & Barneby) H.S.Irwin & Barneby | H. S. Irwin 1273 | 23 Aug 1957 | Mexico | Jalisco | Hostotipaquillo Mun. 2 mi W… | — | 554129 |
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| Senna uniflora (Mill.) H.S.Irwin & Barneby | H. S. Irwin 1272 | 23 Aug 1957 | Mexico | Jalisco | 3 mi. E of Tequila | — | 1585856 |
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| Senna uniflora (Mill.) H.S.Irwin & Barneby | H. S. Irwin 1272 | 23 Aug 1957 | Mexico | Jalisco | 3 mi. E of Tequila | — | 1585857 | ||
| Chamaecrista rotundifolia (Pers.) Greene var. rotundifolia | H. S. Irwin 1255 | 23 Aug 1957 | Mexico | Jalisco | Guadalajara Mun. 5 mi W… | — | 554403 |
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| Chamaecrista rotundifolia (Pers.) Greene var. rotundifolia | H. S. Irwin 1255 | 23 Aug 1957 | Mexico | Jalisco | Guadalajara Mun. 5 mi W… | — | 554405 |
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| Chamaecrista serpens var. wrightii (A.Gray) H.S.Irwin & Barneby | H. S. Irwin 1257 | 23 Aug 1957 | Mexico | Jalisco | Guadalajara Mun. 5 mi W… | — | 554593 |
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| Chamaecrista serpens var. wrightii (A.Gray) H.S.Irwin & Barneby | H. S. Irwin 1274 | 23 Aug 1957 | Mexico | Jalisco | Hostotipaquillo Mun. 5 mi E… | — | 554592 |
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| Chamaecrista nictitans var. jaliscensis (Greenm.) H.S.Irwin & Barneby | H. S. Irwin 1301 | 26 Aug 1957 | Mexico | Jalisco | 3 mi S of Guadalajara,… | — | 554327 |
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| Senna hirsuta var. glaberrima (M.E.Jones) H.S.Irwin & Barneby | H. S. Irwin 1306 | 26 Aug 1957 | Mexico | Michoacán | 10 mi. W of Cojumatlan,… | — | 1583432 |
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| Senna guatemalensis var. hidalgensis H.S.Irwin & Barneby | H. S. Irwin 1343 | 29 Aug 1957 | Mexico | Hidalgo | 10 mi N of Zimapan,… | holotype | 4816 |
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| Senna multiglandulosa (Jacq.) H.S.Irwin & Barneby | H. S. Irwin 1340 | 29 Aug 1957 | Mexico | México | 30 mi. S. of Palmitas,… | — | 1583730 |
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| Senna foetidissima (Sessé & Moc. ex G.Don) H.S.Irwin & Barneby var. foetidissima | H. S. Irwin 1334 | 29 Aug 1957 | Mexico | Michoacán | Hidalgo Mun. 10 mi E… | — | 554956 |
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| Chamaecrista nictitans var. leptadenia (Greenm.) Gandhi & S.L.Hatch | H. S. Irwin 1333 | 29 Aug 1957 | Mexico | Michoacán | Hidalgo Mun. 5 mi E… | — | 554541 |
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| Senna crotalarioides (Kunth) H.S.Irwin & Barneby | H. S. Irwin 1342 | 29 Aug 1957 | Mexico | Hidalgo | Zimapán Mun. 10 mi S… | — | 554896 |
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| Senna crotalarioides (Kunth) H.S.Irwin & Barneby | H. S. Irwin 1342 | 29 Aug 1957 | Mexico | Hidalgo | Zimapán Mun. 10 mi S… | — | 554894 |
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| Senna atomaria (L.) H.S.Irwin & Barneby | H. S. Irwin 1359 | 30 Aug 1957 | Mexico | Veracruz | 30 mi W of Tampico,… | — | 1582771 | ||
| Senna hirsuta var. hirta H.S.Irwin & Barneby | H. S. Irwin 1350 | 30 Aug 1957 | Mexico | San Luis Potosí | 10 mi. S. of Santa… | — | 1583450 |
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| Senna racemosa var. moctezumae H.S.Irwin & Barneby | H. S. Irwin 1349 | 30 Aug 1957 | Mexico | Hidalgo | 1 mi. S. of El… | — | 1585379 |
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| Senna uniflora (Mill.) H.S.Irwin & Barneby | H. S. Irwin 1358 | 30 Aug 1957 | Mexico | Tamaulipas | 4 mi. W of Loma… | — | 1585900 |