Displaying 1 - 50 out of 145 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Pedicularis centranthera A.Gray | M. Armstrong 1 | s.d. | United States of America | Arizona | Grand Canyon | — |
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| Penstemon utahensis Eastw. | M. Armstrong 11 | s.d. | United States of America | Arizona | Grand Canyon | — |
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| Phacelia ambigua M.E.Jones | M. Armstrong 15 | s.d. | United States of America | — | West American Plants | — |
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| Penstemon eatonii var. undosus M.E.Jones | M. Armstrong 20 | — | United States of America | Arizona | Grand Canyon | — |
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| Machaeranthera tortifolia var. imberbis Cronquist | M. Armstrong 21 | — | United States of America | Arizona | Grand Canyon of the Colorado | — |
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| Geraea canescens Torr. & A.Gray | M. Armstrong 40 | s.d. | United States of America | Arizona | Needles | — |
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| Psathyrotes ramosissima (Torr.) A.Gray | M. Armstrong 41 | s.d. | United States of America | Arizona | Needles | — |
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| Clematis lasiantha Nutt. | M. Armstrong 56 | s.d. | United States of America | California | Los Angeles 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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| Marah fabacea (Naudin) Greene | M. Armstrong 75 | s.d. | United States of America | California | Santa Barbara | — |
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| Romneya trichocalyx Eastw. | M. Armstrong 77 | s.d. | United States of America | — | West American Plants | — |
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| Trichostema lanatum Benth. | M. Armstrong 89 | s.d. | United States of America | California | Santa Barbara | — |
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| Iris hartwegii Baker | M. Armstrong 116 | s.d. | United States of America | California | Yosemite | — |
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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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| 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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| Geranium californicum G.N.Jones & F.L.Jones | M. Armstrong 137 | s.d. | United States of America | — | West American Plants | — |
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| Calochortus venustus Douglas ex Benth. | M. Armstrong 148 | s.d. | United States of America | California | Yosemite | — |
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| Pleuricospora fimbriolata A.Gray | M. Armstrong 150 | s.d. | United States of America | California | Yosemite | — |
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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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| Delphinium hansenii (Greene) Greene | M. Armstrong 159 | s.d. | United States of America | California | Yosemite | — |
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| Eriogonum incanum Torr. & A.Gray | M. Armstrong 171 | s.d. | United States of America | — | West America | — |
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| Senecio triangularis Hook. | M. Armstrong 176 | s.d. | United States of America | California | Yosemite | — |
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| Penstemon linarioides var. sileri A.Gray | M. Armstrong 178 | s.d. | United States of America | Arizona | Possibly from Grand Canyon | — |
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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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| 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 | M. Armstrong 206 | — | United States of America | Arizona | Grand Cañon of Colorado. | — |
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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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| Perityle congesta (M.E.Jones) Shinners | M. Armstrong 216 | s.d. | United States of America | Arizona | Under rocks, Grand Cañon [Canyon]… | — |
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| Packera multilobata (Torr. & A.Gray) W.A.Weber & Á.Löve | M. Armstrong 230 | — | United States of America | Arizona | Grand Canyon of the Colorado | — |
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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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| 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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| Hedyotis rubra (Cav.) A.Gray | M. Armstrong 247 | s.d. | United States of America | Arizona | Petrified Forest | — |
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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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| Veronica persica Poir. | M. Armstrong 269 | s.d. | United States of America | — | West American Plants | — |
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| Penstemon cyananthus Hook. var. cyananthus | M. Armstrong 328 | s.d. | United States of America | Utah | Kaysville | — |
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| Potentilla gracilis var. elmeri (Rydb.) Jeps. | M. Armstrong 338 | s.d. | United States of America | Utah | Hot Pots, Heber | — |
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| Penstemon humilis var. brevifolius A.Gray | M. Armstrong 362 | — | United States of America | Utah | Near Great Salt Lake | — |
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| Penstemon laetus var. leptosepalus Greene ex A.Gray | M. Armstrong 368 | s.d. | United States of America | California | Nevada Co. Grass Valley | — |
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| Iris | M. Armstrong 372 | s.d. | United States of America | — | West American Plants | — |
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| Lotus wrangelianus Fisch. & C.A.Mey. | M. Armstrong 373 | s.d. | United States of America | — | West American Plants | — |
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| Lotus oblongifolius (Benth.) Greene | M. Armstrong 375 | s.d. | United States of America | California | West American Plants | — |
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| Lupinus bicolor var. bicolor | M. Armstrong 376 | — | United States of America | California | Grass Valley. | — |
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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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| Lupinus latifolius Lindl. ex J.Agardh | M. Armstrong 390 | — | United States of America | California | West American Plants. [Grass] Valley. | — |
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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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| Phacelia distans Benth. | M. Armstrong 398 | s.d. | United States of America | — | West American Plants | — |
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| Veronica americana Schwein. ex Benth. | M. Armstrong 400 | s.d. | United States of America | California | Siskiyou Co. | — |
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| Crepis monticola Coville | M. Armstrong 406 | s.d. | United States of America | California | Siskiyou Co. | — |
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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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| Linnaea borealis var. longiflora Torr. | M. Armstrong 422 | — | United States of America | California | Siskiyou Co. | — |
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