Displaying 1 - 25 out of 125 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abronia angustifolia Greene | A. M. Powell 2846 | 10 Jun 1976 | United States of America | Texas | Hudspeth Co. White gypsum dunes,… | — |
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| Agropyron Gaertn. | A. M. Powell 5871 | 23 Jul 1992 | United States of America | New Mexico | Otero Co. Near Cloudcroft. | — |
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| Ambrosia ambrosioides (Cav.) Payne | A. M. Powell 1838 | 29 Mar 1970 | Mexico | Baja California Sur | 11 mi W Loreto and… | — |
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| Ambrosia ambrosioides (Cav.) Payne | A. M. Powell 1766 | 24 Mar 1970 | Mexico | Baja California | 18 mi S of Bahía… | — |
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| Ambrosia chenopodiifolia (Benth.) W.W.Payne | A. M. Powell 1816 | 26 Mar 1970 | Mexico | Baja California | 10 mi NW of El… | — |
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| Ambrosia dumosa (A.Gray) W.W.Payne | A. M. Powell 1735 | 23 Mar 1970 | Mexico | Baja California | 16 mi S San Felipe | — |
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| Ambrosia ilicifolia (A.Gray) W.W.Payne | A. M. Powell 1751 | 23 Mar 1970 | Mexico | Baja California | About 10 mi S of… | — |
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| Ambrosia magdalenae (Brandegee) W.W.Payne | A. M. Powell 1769 | 24 Mar 1970 | Mexico | Baja California | Intersection of main road down… | — |
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| Amelanchier denticulata (Kunth) K.Koch | A. M. Powell 2810 | 07 Jun 1975 | United States of America | Texas | Presidio Co. Along the Right… | — |
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| Amsonia longiflora Torr. | A. M. Powell 2931 | 23 Jun 1976 | United States of America | Texas | Hudspeth Co. Mayfield Canyon, S… | — |
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| Asclepias subverticillata (A.Gray) Vail | A. M. Powell 3002 | 12 Jul 1976 | United States of America | Texas | El Paso Co. south end… | — |
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| Batesimalva violacea (Rose) Fryxell | A. M. Powell 3632 | 19 Sep 1981 | United States of America | Texas | Brewster Co. Big Bend Nat'l… | — |
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| Brickellia | A. M. Powell 1805a | 25 Mar 1970 | Mexico | Baja California | 4 mi S of Bahia… | — |
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| Brongniartia minutifolia S.Watson | A. M. Powell 3631 | 29 Aug 1981 | United States of America | Texas | Brewster Co. low white hills,… | — |
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| Calycoseris wrightii A.Gray | A. M. Powell 1761 | 24 March 1970 | Mexico | Baja California | 18 miles S of Bahia… | — |
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| Calylophus | A. M. Powell 2359 | 14 Jun 1972 | United States of America | Texas | Ward Co. ca 6 mi… | — |
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| Chaenactis lacera Greene | A. M. Powell 1810 | 26 Mar 1970 | Mexico | Baja California Sur | Los Cabos Mun. San Jose… | — |
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| Chaenactis stevioides Hook. & Arn. | A. M. Powell 1800 | 25 Mar 1970 | Mexico | Baja California | Ca. 27 miles W of… | — |
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| Dalea formosa Torr. | A. M. Powell 3070 | 25 Mar 1977 | United States of America | Texas | Val Verde Co. Langtry. | — |
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| Dalea formosa Torr. | A. M. Powell 3071 | 25 Mar 1977 | United States of America | Texas | Terrell Co. hills 3 mi… | — |
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| Dalea formosa Torr. | A. M. Powell 3067 | 21 Mar 1977 | United States of America | Texas | Terrell Co. 12 mi E… | — |
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| Dalea formosa Torr. | A. M. Powell 1561 | 10 Apr 1968 | United States of America | Texas | Hudspeth Co. ca 5 mi… | — |
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| Dalea formosa Torr. | A. M. Powell 3076 | 02 Apr 1977 | United States of America | Texas | Brewster Co. ca 9 mi… | — |
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| Dalea frutescens A.Gray | A. M. Powell 2454 | 12 Sep 1972 | United States of America | Texas | Brewster Co. ca 13 mi… | — |
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| Draba cuneifolia Nutt. | A. M. Powell 6506 | 29 Mar 2005 | United States of America | Texas | Brewster Co. ca 9 mi… | — |
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