Displaying 26 - 42 out of 42 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | ||
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| Lotus rigidus (Benth.) Greene | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. Congress Junction | — | 2585181 |
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| Mahonia haematocarpa (Wooton) Fedde | D. M. Crooks s.n. | 12 Apr 1939 | United States of America | Arizona | Cave Creek, Chiricahua Mts. | — | 3831395 |
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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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| Mentzelia nitens Greene | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. 10 miles east… | — | 3600531 |
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| Mirabilis laevis var. villosa (Kellogg) Spellenb. | D. M. Crooks s.n. | 18 Apr 1938 | United States of America | Arizona | Maricopa Co. 10 miles south… | — | 3376253 |
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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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| 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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| Phacelia distans Benth. | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. 10 miles west… | — | 3193959 |
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| Physaria newberryi A.Gray | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | 1 mile west of Burrow… | — | 3188397 |
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| Salazaria mexicana Torr. | D. M. Crooks s.n. | 19 Apr 1938 | United States of America | Arizona | Yavapai Co. Santa Maria River,… | — | 3092983 |
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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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| 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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| 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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| Streptanthus cordatus Nutt. ex Torr. & A.Gray | D. M. Crooks s.n. | 20 Apr 1938 | United States of America | Arizona | Mohave Co. 1 mile west… | — | 3155969 |
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| Tiquilia palmeri (A.Gray) A.T.Richardson | D. M. Crooks s.n. | 23 Apr 1938 | United States of America | Arizona | 10 miles east of Yuma,… | — | 3249718 |
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| Tiquilia plicata (Torr.) A.T.Richardson | D. M. Crooks s.n. | 18 Apr 1938 | United States of America | Arizona | Maricopa Co. 10 miles south… | — | 3249765 |
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| Unspecified | D. M. Crooks s.n. | 18 Apr 1938 | United States of America | Arizona | 10 miles west of Wickenberg | — | 3876454 |
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