Displaying 76 - 100 out of 125 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Perityle megalocephala var. megalocephala | A. M. Powell 1274 | 03 Aug 1964 | United States of America | Nevada | Nye Co. ca. 16 mles… | — |
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| Perityle megalocephala var. oligophylla A.M.Powell | A. M. Powell 1612 | 28 May 1968 | United States of America | California | Inyo Co. Rock bluffs, W.… | — |
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| Perityle parryi A.Gray | A. M. Powell 1396 | 20 Mar 1966 | United States of America | Texas | Presidio Co. road cut along… | — |
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| Perityle rupestris (A.Gray) Shinners | A. M. Powell 1555 | 23 Sep 1967 | United States of America | Texas | Brewster Co. rock bluffs, above… | — |
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| Perityle rupestris (A.Gray) Shinners | A. M. Powell 1228 | 06 Jun 1964 | United States of America | Texas | Jeff Davis Co. ca. 2… | — |
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| Perityle rupestris (A.Gray) Shinners | A. M. Powell 1559 | 30 Sep 1967 | United States of America | Texas | Jeff Davis Co. bluffs, 15… | — |
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| Perityle staurophylla (Barneby) Shinners | A. M. Powell 1276 | 28 Aug 1964 | United States of America | New Mexico | Otero Co. ca 1.5 mi.… | — |
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| Perityle tenella (M.E.Jones) J.F.Macbr. | A. M. Powell 1267 | 31 Jul 1964 | United States of America | Utah | Washington Co. ca. 1/2 to… | — |
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| 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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| Perityle turneri A.M.Powell | A. M. Powell 1857 | 2 Apr 1970 | Mexico | Sinaloa | Concordia Mun. 2.2 mi E… | — | ||||
| Perityle warnockii A.M.Powell | A. M. Powell 1311 | 11 Oct 1964 | United States of America | Texas | Val Verde Co. Ca. 40-50… | isotype |
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| Peucephyllum schottii A.Gray | A. M. Powell 1738 | 23 Mar 1970 | Mexico | Baja California | 30 mi S of San… | — | ||||
| Poliomintha incana (Torr.) A.Gray | A. M. Powell 2844 | 10 Jun 1976 | United States of America | Texas | Hudspeth Co. White gypsum dunes,… | — |
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| Pomaria jamesii (Torr. & A.Gray) Walp. | A. M. Powell 2849 | 10 Jun 1976 | United States of America | Texas | Hudspeth Co. white gypsum dunes,… | — |
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| Quercus hinckleyi C.H.Müll. | A. M. Powell 2800 | 01 Nov 1974 | United States of America | Texas | Presidio Co. Ca. 50 yards… | — |
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| Quercus pungens Liebm. | A. M. Powell 5772 | 12 Oct 1991 | United States of America | Texas | Hudspeth Co. Eagle Mountains, WNW… | — |
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| Sartwellia mexicana A.Gray ex S.Watson | A. M. Powell 2592 | 21 Aug 1973 | Mexico | Zacatecas | 55 mi N of junction… | — | ||||
| Sartwellia mexicana A.Gray ex S.Watson | A. M. Powell 2580 | 21 Aug 1973 | Mexico | San Luis Potosí | Matehuala Mun. 28 mi S… | — | ||||
| Sartwellia puberula Rydb. | A. M. Powell 2548 | 19 Aug 1973 | Mexico | Coahuila | 0.5 mi S of Estacion… | — | ||||
| Selinocarpus gypsophilus B.A.Fowler | A. M. Powell 2105 | 25 May 1971 | Mexico | Chihuahua | Ca. 15 miles southwest of… | isotype |
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| Senegalia roemeriana (Scheele) Britton & Rose | A. M. Powell 3750 | 09 Jul 1982 | United States of America | Texas | Brewster Co. limestone hills W… | — |
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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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| 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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| Trianthema portulacastrum L. | A. M. Powell 6001 | 12 Aug 1993 | United States of America | Texas | Presidio Co. Roadside in drainage,… | — |
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| Tridax balbisioides (Kunth) A.Gray | A. M. Powell 949 | 26 Aug 1961 | Mexico | Durango | Durango Mun. Along route 40,… | — |