Displaying 51 - 75 out of 125 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Nicolletia trifida Rydb. | A. M. Powell 1739 | 23 Mar 1970 | Mexico | Baja California | 30 mi S of San… | — | ||||
| Marina parryi (Torr. & A.Gray) Barneby | A. M. Powell 1746 | 23 Mar 1970 | Mexico | Baja California | 24 miles S of Puertecitos | — | ||||
| Hofmeisteria fasciculata (Benth.) Walp. | A. M. Powell 1747 | 23 Mar 1970 | Mexico | Baja California | 24 mi S of Puertecitos | — |
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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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| Machaeranthera pinnatifida (Hook.) Shinners | A. M. Powell 1757 | 24 Mar 1970 | Mexico | Baja California | 18 mi S of Bahía… | — |
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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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| Malacothrix glabrata (A.Gray ex D.C. Eaton) A.Gray | A. M. Powell 1765 | 24 Mar 1970 | Mexico | Baja California | 18 mi S of Bahía… | — |
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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 magdalenae (Brandegee) W.W.Payne | A. M. Powell 1769 | 24 Mar 1970 | Mexico | Baja California | Intersection of main road down… | — |
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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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| Layia glandulosa (Hook.) Hook. & Arn. | A. M. Powell 1806 | 26 Mar 1970 | Mexico | Baja California | About 10 mi NE of… | — |
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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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| 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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| Palafoxia arida B.L.Turner & M.I.Morris | A. M. Powell 1818 | 27 Mar 1970 | Mexico | Baja California Sur | 25 mi S of El… | — | ||||
| Ambrosia ambrosioides (Cav.) Payne | A. M. Powell 1838 | 29 Mar 1970 | Mexico | Baja California Sur | 11 mi W Loreto and… | — |
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| Perityle crassifolia (Brandegee) var. crassifolia | A. M. Powell 1849 | 31 Mar 1970 | Mexico | Baja California Sur | La Paz Mun. Punta Arena,… | — | ||||
| Perityle turneri A.M.Powell | A. M. Powell 1857 | 2 Apr 1970 | Mexico | Sinaloa | Concordia Mun. 2.2 mi E… | — | ||||
| Perityle turneri A.M.Powell | A. M. Powell 1858 | 02 Apr 1970 | Mexico | Chihuahua | 3.4 miles east of El… | isotype |
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| Heuchera wellsiae R.A.Folk | A. M. Powell 1860 | 02 Apr 1970 | Mexico | Durango | 3.4 miles E of El… | holotype |
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| Hymenoxys linearifolia Hook. | A. M. Powell 1872 | 16 Apr 1970 | United States of America | Texas | Ward Co. 2 miles W… | — |
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| Selinocarpus gypsophilus B.A.Fowler | A. M. Powell 2105 | 25 May 1971 | Mexico | Chihuahua | Ca. 15 miles southwest of… | isotype |
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| Mentzelia humilis (A.Gray) J.Darl. | A. M. Powell 2132 | 23 Jun 1971 | United States of America | Texas | Culberson Co. gyp hills 35… | — |
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| Sphaeralcea | A. M. Powell 2353 | 14 Jun 1972 | United States of America | Texas | Ward Co. low gypsum ridges… | — |
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| Nerisyrenia linearifolia (S.Watson) Greene | A. M. Powell 2354 | 14 Jun 1972 | United States of America | Texas | Ward Co. ca 6 mi… | — |
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| Tiquilia hispidissima (Torr. & A.Gray) A.T.Richardson | A. M. Powell 2355 | 14 Jun 1972 | United States of America | Texas | Ward Co. ca 6 mi… | — |
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