Displaying 26 - 42 out of 42 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Asteraceae | D. M. Crooks s.n. | 22 Apr 1937 | United States of America | Arizona | Gila River, Dome | — | 3200140 |
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| Atriplex polycarpa (Torr.) S.Watson | D. M. Crooks s.n. | 22 Apr 1938 | United States of America | Arizona | Yuma Co. Gila River at… | — | 3334926 |
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| Camissonia arenaria (A.Nelson) P.H.Raven | D. M. Crooks s.n. | 23 Apr 1938 | United States of America | Arizona | Yuma Co. Gila Mountains | — | 03169421 |
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| Sphaeralcea ambigua A.Gray | D. M. Crooks s.n. | 23 Apr 1938 | United States of America | Arizona | Yuma Co. Gila Mts. | — | 3971289 |
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| Pediastrum boryanum (Turpin) Menegh. | F. E. Drouet | D. Richards | D. M. Crooks | L. D. Benson | R. A. Darrow 2774 | 30 Oct 1939 | United States of America | Arizona | Pima Co. University of Arizona… | — | 03052211 |
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| Solanum umbelliferum Eschsch. | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. McCloud Mts. near… | — | 00820535 |
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| Brickellia atractyloides A.Gray | D. M. Crooks s.n. | 18 Apr 1938 | United States of America | Arizona | Maricopa Co. Wickenberg, 10 miles… | — | 2028029 |
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| Dyssodia porophylloides A.Gray | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Maricopa Co. | — | 2070825 |
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| Lotus humistratus Greene | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Maricopa Co. | — | 2582055 |
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| Sophora arizonica S.Watson | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Mohave Co. 20 miles north… | — | 2628341 |
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| Delphinium parishii A.Gray subsp. parishii | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Mohave Co. 0 miles W… | — | 2751616 |
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| Delphinium parishii A.Gray subsp. parishii | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Mohave Co. 10 miles west… | — | 2751618 |
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| Hymenopappus filifolius var. lugens (Greene) Jeps. | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Mohave Co. 1 mile west… | — | 2915687 |
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| Hyptis emoryi Torr. | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Mohave Co. Burrow Creek, between… | — | 3039134 |
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| Centrostegia thurberi (A.Gray ex Benth.) S.Watson | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Round Valley, 20 miles NW… | — | 3063824 |
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| Malacothrix stebbinsii W.S.Davis & P.H.Raven | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. 10 miles west… | — | 3078890 |
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| Palafoxia arida B.L.Turner & M.I.Morris | D. M. Crooks s.n. | 23 Apr 1938 | United States of America | Arizona | 20 miles east of Yuma | — | 3119951 |
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