Displaying 1 - 75 out of 145 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Agastache pallidiflora (A.Heller) Rydb. | M. Armstrong 236 | — | United States of America | Arizona | Grand Canyon of the Colorado | — |
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| Anthericum torreyi Baker | M. Armstrong 200 | s.d. | United States of America | Arizona | Grand Canon of the Colorado | — |
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| Antirrhinum kelloggii Greene | M. Armstrong 775 | s.d. | United States of America | — | West American Plants | — |
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| Arnica discoidea Benth. | M. Armstrong 471 | s.d. | United States of America | Oregon | Bald Butte, Hood River. | — |
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| Arnica latifolia Bong. | M. Armstrong 483 | s.d. | United States of America | Washington | Mt. Rainier | — |
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| Asclepias vestita Hook. & Arn. | M. Armstrong 968 | s.d. | United States of America | California | Hesperia | — |
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| Calochortus amabilis Purdy | M. Armstrong 882 | s.d. | United States of America | California | Mendocino Co. | — |
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| Calochortus bruneaunis A.Nelson & J.F.Macbr. | M. Armstrong 955 | s.d. | United States of America | Idaho | Twin Falls. | — |
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| Calochortus bruneaunis A.Nelson & J.F.Macbr. | M. Armstrong 944 | s.d. | United States of America | Nevada | Washoe Co. | — |
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| Calochortus catalinae S.Watson | M. Armstrong 840 | s.d. | United States of America | California | West American Plants | — |
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| Calochortus kennedyi Porter | M. Armstrong 969 | s.d. | United States of America | California | Hesperia | — |
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| Calochortus superbus Purdy ex Howell | M. Armstrong 905 | s.d. | United States of America | California | West American Plants | — |
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| Calochortus tolmiei Hook. & Arn. | M. Armstrong 893 | s.d. | United States of America | California | Mendocino Co. | — |
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| Calochortus venustus Douglas ex Benth. | M. Armstrong 148 | s.d. | United States of America | California | Yosemite | — |
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| Camissonia campestris (Greene) P.H.Raven | M. Armstrong 806 | s.d. | United States of America | California | Hesperia | — |
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| Camissonia claviformis subsp. yumae (P.H.Raven) P.H.Raven | M. Armstrong 678 | s.d. | United States of America | — | West American Plants | — |
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| Camissonia claviformis var. cruciformis (Kellogg) Cronquist | M. Armstrong 948 | s.d. | United States of America | Nevada | Washoe Co. | — |
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| Camissonia lewisii P.H.Raven | M. Armstrong 760 | s.d. | United States of America | — | Western America | — |
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| Camissonia nevadensis (Kellogg) P.H.Raven | M. Armstrong 949 | s.d. | United States of America | Nevada | Washoe Co. | — |
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| Cardamine integrifolia (Nutt.) Greene | M. Armstrong 772 | s.d. | United States of America | — | West American Plants | — |
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| Castilleja angustifolia (Nutt.) G.Don | M. Armstrong 958 | s.d. | United States of America | Idaho | Twin Falls | — |
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| Castilleja attenuata (A.Gray) T.I.Chuang & Heckard | M. Armstrong 915 | s.d. | United States of America | California | Willits | — |
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| Castilleja densiflora (Benth.) T.I.Chuang & Heckard var. densiflora | M. Armstrong 909 | s.d. | United States of America | — | West American Plants | — |
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| Castilleja densiflora (Benth.) T.I.Chuang & Heckard var. densiflora | M. Armstrong 870 | s.d. | United States of America | California | San Mateo Co. | — |
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| Castilleja exserta (A.Heller) T.I.Chuang & Heckard var. exserta | M. Armstrong 900 | s.d. | United States of America | California | Mendocino Co. | — |
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| Castilleja martinii var. martinii | M. Armstrong 691 | s.d. | United States of America | — | West American Plants | — |
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| Castilleja rubicundula (Jeps.) T.I.Chuang & Heckard var. rubicundula | M. Armstrong 891 | s.d. | United States of America | California | Mendocino Co. | — |
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| Ceanothus parvifolius (S.Watson) Trel. | M. Armstrong 151 | s.d. | United States of America | — | West American Plants | — |
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| Chaenactis glabriuscula var. denudata (Nutt.) Munz | M. Armstrong 682 | s.d. | United States of America | California | San Bernardino Co. | — |
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| Cirsium | M. Armstrong 206 | — | United States of America | Arizona | Grand Cañon of Colorado. | — |
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| Cirsium arizonicum (A.Gray) Petr. | M. Armstrong 205 | s.d. | United States of America | Colorado | Grand Canon of Colorado, Ariz. | — |
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| Cirsium brevistylum Cronquist | M. Armstrong 468 | s.d. | United States of America | Oregon | Parkdale | — |
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| Cirsium californicum A.Gray | M. Armstrong 729 | s.d. | United States of America | California | Capistrano | — |
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| Cirsium occidentale (Nutt.) Jeps. | M. Armstrong 786 | s.d. | United States of America | California | Delmar | — |
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| Cirsium occidentale (Nutt.) Jeps. | M. Armstrong 880 | s.d. | United States of America | California | San Francisco Co. Sea cliffs | — |
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| Cirsium occidentale var. candidissimum (Greene) J.F.Macbr. | M. Armstrong 398 | — | United States of America | California | Colfax. | — |
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| Cirsium occidentale var. coulteri (Harv. & A.Gray) Jeps. | M. Armstrong 895 | — | United States of America | California | Mt. Diabolo. | — |
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| Clarkia williamsonii (Durand & Hilg.) H.F.Lewis & M.R.Lewis | M. Armstrong 126 | s.d. | United States of America | California | Yosemite | — |
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| Clematis lasiantha Nutt. | M. Armstrong 56 | s.d. | United States of America | California | Los Angeles Co. | — |
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| Cleome platycarpa Torr. | M. Armstrong 945 | s.d. | United States of America | Nevada | Washoe Co. [County inferred from… | — |
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| Clintonia andrewsiana Torr. | M. Armstrong 845 | s.d. | United States of America | — | West American Plants | — |
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| Collinsia grandiflora Douglas ex Lindl. | M. Armstrong 416 | June 18 | United States of America | California | Pine woods near Mt. Shasta | — |
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| Collinsia heterophylla G.Buist ex Graham | M. Armstrong 743 | s.d. | United States of America | — | West American | — |
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| Corethrogyne filaginifolia var. bernardina (Abrams) H.M.Hall | M. Armstrong 709 | s.d. | United States of America | California | San Bernardino Co. | — |
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| Corydalis scouleri Hook. | M. Armstrong 515 | s.d. | United States of America | Oregon | Rainier | — |
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| Crepis acuminata Nutt. | M. Armstrong 957 | s.d. | United States of America | Idaho | Twin Falls. | — |
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| Crepis monticola Coville | M. Armstrong 406 | s.d. | United States of America | California | Siskiyou Co. | — |
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| Delphinium hansenii (Greene) Greene | M. Armstrong 159 | s.d. | United States of America | California | Yosemite | — |
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| Delphinium variegatum | M. Armstrong 885 | May 13 | United States of America | California | Mendocino Co. | — |
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| Eriodictyon tomentosum Benth. | M. Armstrong 779 | s.d. | United States of America | — | West American Plants | — |
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| Eriogonum arcuatum Greene var. arcuatum | M. Armstrong 209 | s.d. | United States of America | Arizona | Grand Canon of the Colorado | — |
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| Eriogonum incanum Torr. & A.Gray | M. Armstrong 171 | s.d. | United States of America | — | West America | — |
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| Eriogonum ovalifolium var. purpureum (Nutt.) Durand | M. Armstrong 962 | s.d. | United States of America | — | West American Plants | — |
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| Eriophyllum lanatum var. integrifolium (Hook.) Smiley | M. Armstrong 122 | s.d. | United States of America | California | Yosemite Valley | — |
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| Geraea canescens Torr. & A.Gray | M. Armstrong 40 | s.d. | United States of America | Arizona | Needles | — |
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| Geranium californicum G.N.Jones & F.L.Jones | M. Armstrong 137 | s.d. | United States of America | — | West American Plants | — |
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| Gilia achilleifolia subsp. multicaulis (Benth.) V.E.Grant & A.D.Grant | M. Armstrong 801 | s.d. | United States of America | California | San Bernardino Co. | — |
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| Gilia capitata | M. Armstrong 899 | s.d. | United States of America | — | West American Plants | — |
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| Gilia latiflora (A.Gray) A.Gray | M. Armstrong 812 | s.d. | United States of America | California | Hesperia | — |
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| Gilia tricolor Benth. | M. Armstrong 874 | s.d. | United States of America | California | Mendocino Co. | — |
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| Giliastrum acerosum (A.Gray) Rydb. | M. Armstrong 248 | s.d. | United States of America | Arizona | Petrified Forest | — |
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| Hastingsia alba (Durand) S.Watson | M. Armstrong 439 | s.d. | United States of America | California | Siskiyou Co. | — |
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| Hedyotis rubra (Cav.) A.Gray | M. Armstrong 247 | s.d. | United States of America | Arizona | Petrified Forest | — |
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| Hesperocallis undulata A.Gray | M. Armstrong 672 | s.d. | United States of America | — | West American Plants | — |
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| Hymenopappus filifolius var. lugens (Greene) Jeps. | M. Armstrong 237 | s.d. | United States of America | Arizona | Grand Canon of the Colorado | — |
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| Iris | M. Armstrong 372 | s.d. | United States of America | — | West American Plants | — |
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| Iris hartwegii Baker | M. Armstrong 116 | s.d. | United States of America | California | Yosemite | — |
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| Lathyrus splendens Kellogg | M. Armstrong 758 | s.d. | United States of America | — | West American Plants | — |
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| Lathyrus sulphureus W.H.Brewer ex A.Gray | M. Armstrong 377 | s.d. | United States of America | — | West American Plants | — |
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| Leptosiphon androsaceus Benth. | M. Armstrong 876 | s.d. | United States of America | — | West American Plants | — |
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| Leptosiphon breviculus (A.Gray) J.M.Porter & L.A.Johnson | M. Armstrong 801 | s.d. | United States of America | California | Hesperia | — |
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| Leptosiphon liniflorus (Benth.) J.M.Porter & L.A.Johnson | M. Armstrong 751 | s.d. | United States of America | — | West American Plants | — |
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| Leptosiphon parviflorus Benth. | M. Armstrong 825 | s.d. | United States of America | — | West American Plants | — |
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| Leptosiphon parviflorus Benth. | M. Armstrong 752 | s.d. | United States of America | California | San Diego Co. | — |
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| Linanthus calfiornicus (Hook. & Arn.) J.M.Porter & L.A.Johnson | M. Armstrong 58 | s.d. | United States of America | California | Mt. Lowe | — |
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