Displaying 26 - 50 out of 143 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Caucalis microcarpa Hook. & Arn. | M. C. Wiegand 3930 | 25 Apr 1922 | United States of America | Arizona | Pima Co. Recreation area, Santa… | — |
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| Ceanothus cuneatus (Hook.) Nutt. | M. C. Wiegand 3788 | 27 Apr 1922 | United States of America | Arizona | Pinal Co. 3 miles southeast… | — |
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| Cerastium arvense L. | M. C. Wiegand 3195 | 13 Jun 1922 | United States of America | Colorado | Boulder Co. 17 miles west… | — |
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| Chaenactis carphoclinia A.Gray | M. C. Wiegand 4508 | 15 Apr 1922 | United States of America | Arizona | Yuma Co. Salome road, 4… | — |
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| Chaenactis stevioides Hook. & Arn. | M. C. Wiegand 4517 | 15 Apr 1922 | United States of America | Arizona | Yuma Co. Salome road, 4… | — |
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| Chaetopappa ericoides (Torr.) G.L.Nesom | M. C. Wiegand 4389 | 22 May 1922 | United States of America | Arizona | Coconino Co. Open prairie, Winslow… | — |
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| Chaetopappa ericoides (Torr.) G.L.Nesom | M. C. Wiegand 4388 | 20 May 1922 | United States of America | New Mexico | Socorro Co. Desert Mesa, 23… | — |
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| Cirsium horridulum Michx. var. horridulum | M. C. Wiegand s.n. | July 11-08 | United States of America | Massachusetts | North Truro. | — |
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| Clematis columbiana (Nutt.) Torr. & A.Gray var. columbiana | M. C. Wiegand 3238 | 05 Jun 1922 | United States of America | New Mexico | Taos Co. 18 miles east… | — |
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| Clematis hirsutissima Pursh | M. C. Wiegand 3242 | 09 Jun 1922 | United States of America | Colorado | El Paso Co. Pikes Peak… | — |
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| Clematis hirsutissima Pursh | M. C. Wiegand 3243 | 05 Jun 1922 | United States of America | New Mexico | Colfax Co. road to Raton,… | — |
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| Corallorhiza maculata Raf. | M. C. Wiegand s.n. | 08 Sep 1908 | United States of America | Massachusetts | E. side of aqueduct E.… | — |
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| Corydalis aurea Willd. | M. C. Wiegand 3298 | 05 Jun 1922 | United States of America | New Mexico | Colfax Co. 18 mi E… | — |
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| Crepis capillaris (L.) Wallr. | M. C. Wiegand s.n. | 09 Oct 1912 | United States of America | Massachusetts | Norfolk Co. Weed in Bot… | — |
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| Cryptantha capitata (Eastw.) I.M.Johnst. | M. C. Wiegand 4174 | 07 May 1922 | United States of America | Arizona | Coconino Co. Santa Monica Spring,… | — |
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| Cryptantha fulvocanescens (S.Watson) Payson | M. C. Wiegand 4172 | 22 May 1922 | United States of America | Arizona | Coconino Co. Open prairie, 5… | — |
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| Dalea formosa Torr. | M. C. Wiegand 3600 | 24 May 1922 | United States of America | Arizona | Apache Co. Springfield road, 13… | — |
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| Dalea mollissima (Rydb.) Munz | M. C. Wiegand 3592 | 12 Apr 1922 | United States of America | California | San Bernardino Co. Mohave Desert,… | — |
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| Dalea versicolor var. sessilis (A.Gray) Barneby | M. C. Wiegand 3597 | 24 Apr 1922 | United States of America | Arizona | Pinal Co. Trail, Old Baldy,… | — |
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| Draba cuneifolia Nutt. | M. C. Wiegand 3305 | 04 May 1922 | United States of America | Arizona | Yavapai Co. Branch road to… | — |
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| Ephedra torreyana S.Watson | M. C. Wiegand 2978 | 28 May 1922 | United States of America | New Mexico | Sandoval Co. 39 miles north… | — |
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| Eriastrum diffusum subsp. jonesii H.Mason | M. C. Wiegand 4037 | 17 Apr 1922 | United States of America | Arizona | 23 miles north of Florence,… | — |
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| Eriastrum diffusum subsp. jonesii H.Mason | M. C. Wiegand 4036 | 15 Apr 1922 | United States of America | Arizona | Yuma Co. 4 miles east… | — |
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| Erigeron divergens var. cinereus A.Gray | M. C. Wiegand 4407 | 25 Apr 1922 | United States of America | Arizona | Pima Co. Santa Rita Mountains,… | — |
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| Erigeron flagellaris A.Gray | M. C. Wiegand 4402 | 07 Jun 1922 | United States of America | New Mexico | Colfax Co. Raton Pass, 10… | — |
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