Displaying 1 - 25 out of 143 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Abronia fragrans Nutt. ex Hook. | M. C. Wiegand 3170 | 02 Jun 1922 | United States of America | New Mexico | Santa Fe Co. 14 miles… | — |
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| Ambrosia deltoidea (Torr.) W.W.Payne | M. C. Wiegand 4447 | 02 May 1922 | United States of America | Arizona | Maricopa Co. Black Canyon road,… | — |
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| Amelanchier laevis Wiegand | M. C. Wiegand s.n. | 06 Mar 1908; 24 Jun 1911 | United States of America | Massachusetts | Norfolk Co. Aqueduct Bridge. | isotype |
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| Androsace septentrionalis L. | M. C. Wiegand 3962 | 29 May 1922 | United States of America | New Mexico | Santa Fe Co. Canyon Road… | — |
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| Anemone patens var. multifida Pritz. | M. C. Wiegand 3227 | 29 May 1922 | United States of America | New Mexico | Santa Fe Co. Canyon road… | — |
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| Antennaria marginata Greene | M. C. Wiegand 4433 | 29 May 1922 | United States of America | New Mexico | Santa Fe Co. Canyon Road… | — |
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| Antennaria parvifolia Nutt. | M. C. Wiegand 4427 | 13 Jun 1922 | United States of America | Colorado | Boulder Co. Bog, 17 mi… | — |
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| Antennaria parvifolia Nutt. | M. C. Wiegand 7849 | 24 Jun 1949 | United States of America | New Mexico | Taos Co. North side of… | — |
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| Aphanostephus ramosissimus var. humilis (Benth.) B.A.Birdsong | M. C. Wiegand 4370 | 25 May 1922 | United States of America | New Mexico | Socorro Co. 3 mi N… | — |
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| Arabis fendleri (S.Watson) Greene | M. C. Wiegand 3386 | 27 Apr 1922 | United States of America | Arizona | Pinal Co. Mount Lemmon road,… | — |
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| Arctostaphylos uva-ursi (L.) Spreng. | M. C. Wiegand 3952 | 08 Jun 1922 | United States of America | Colorado | El Paso Co. North Cheyenne… | — |
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| Arenaria fendleri A.Gray var. fendleri | M. C. Wiegand 3192 | 11 Jun 1922 | United States of America | Colorado | El Paso Co. 10 miles… | — |
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| Aristida purpurea var. fendleriana (Steud.) Vasey | M. C. Wiegand 3010 | 23 May 1922 | United States of America | Arizona | Apache Co. Holbrook road, 10… | — |
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| Astragalus bisulcatus (Hook.) A.Gray var. bisulcatus | M. C. Wiegand 3646 | 06 Jun 1922 | United States of America | New Mexico | Colfax Co. 2 miles south… | — |
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| Astragalus calycosus var. scaposus (A.Gray) M.E.Jones | M. C. Wiegand 3668 | 22 May 1922 | United States of America | Arizona | Coconino Co. 21 miles southeast… | — |
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| Astragalus crassicarpus var. paysonii (E.H.Kelso) Barneby | M. C. Wiegand 3631 | 07 Jun 1922 | United States of America | Colorado | Pueblo Co. 20 miles south… | — |
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| Astragalus didymocarpus var. obispensis (Rydb.) Barneby | M. C. Wiegand 3606 | 01 Apr 1922 | United States of America | California | Imperial Co. 4 miles east… | — |
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| Astragalus flexuosus var. greenei (A.Gray) Barneby | M. C. Wiegand 3635 | 02 Jun 1922 | United States of America | New Mexico | Santa Fe Co. 20 miles… | — |
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| Astragalus lentiginosus var. diphysus (A.Gray) M.E.Jones | M. C. Wiegand 3627 | 23 May 1922 | United States of America | Arizona | Apache Co. 34 miles west… | — |
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| Astragalus nuttallianus var. imperfectus (Rydb.) Barneby | M. C. Wiegand 3615 | 18 Apr 1922 | United States of America | Arizona | 19 miles northwest of Florence,… | — |
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| Astragalus shortianus Nutt. ex Torr. & A.Gray | M. C. Wiegand 3679 | 09 Jun 1922 | United States of America | Colorado | El Paso Co. Pikes Peak… | — |
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| Astragalus xiphoides (Barneby) Barneby | M. C. Wiegand 3618 | 23 May 1922 | United States of America | Arizona | Navajo Co. Springerville road, 12… | — |
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| Atriplex canescens (Pursh) Nutt. | M. C. Wiegand 3153 | 25 May 1922 | United States of America | New Mexico | Socorro Co. Blue Canyon, 4… | — |
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| Camissonia breviflora (Torr. & A.Gray) P.H.Raven | M. C. Wiegand 3880 | 28 Apr 1922 | United States of America | Arizona | Pima Co. Oracle - Globe… | — |
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| Carex flava L. | M. C. Wiegand 1921 | 07 Jun 1914 | United States of America | New York | Onondaga Co. Shore of Green… | — |
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