516 Records
| Citation | Family Name |
| Abronia fragrans Nuttall ex Hooker |
NYCTAGINACEAE |
| Abutilon incanum (Link) Sweet |
MALVACEAE |
| Achnatherum hymenoides (Roemer & Schultes) Barkworth |
POACEAE |
| Adenolinum lewisii (Pursh) Löve & Löve |
LINACEAE |
| Adenolinum pratense (Norton) W. A. Weber |
LINACEAE |
| Agaloma marginata (Pursh) Löve & Löve |
EUPHORBIACEAE |
| Agrimonia striata Michaux |
ROSACEAE |
| Ailanthus altissima (P. Miller) Swingle |
SIMAROUBACEAE |
| Allium textile Nelson & Macbride |
ALLIACEAE |
| Amaranthus albus L. |
AMARANTHACEAE |
| Amaranthus arenicola I. M. Johnston |
AMARANTHACEAE |
| Amaranthus blitoides S. Watson |
AMARANTHACEAE |
| Amaranthus palmeri S. Watson |
AMARANTHACEAE |
| Amaranthus retroflexus L. |
AMARANTHACEAE |
| Ambrosia acanthicarpa Hooker |
ASTERACEAE |
| Ambrosia confertiflora De Candolle |
ASTERACEAE |
| Ambrosia grayi (A. Nelson) Shinners |
ASTERACEAE |
| Ambrosia psilostachya De Candolle var coronopifolia (Torrey & Gray) Farwell |
ASTERACEAE |
| Ambrosia trifida L. |
ASTERACEAE |
| Amorpha canescens Pursh |
FABACEAE |
| Amorpha nana Nuttall |
FABACEAE |
| Andropogon gerardii Vitman |
POACEAE |
| Andropogon hallii Hackel |
POACEAE |
| Anisantha tectorum (L.) Nevski |
POACEAE |
| Apocynum cannabinum L. |
APOCYNACEAE |
| Argemone polyanthemos (Fedde) G. Ownbey |
PAPAVERACEAE |
| Argemone squarrosa Greene |
PAPAVERACEAE |
| Argyrochosma fendleri (Kunze) Windham |
PTERIDACEAE |
| Argythamnia mercurialina (Nuttall) Müller-Argoviensis |
EUPHORBIACEAE |
| Aristida adscensionis L. |
POACEAE |
| Aristida divaricata Humboldt & Bonpland ex Willdenow |
POACEAE |
| Aristida havardii Vasey |
POACEAE |
| Aristida purpurea Nuttall |
POACEAE |
| Artemisia carruthii Wood {ex} Carruth |
ASTERACEAE |
| Artemisia ludoviciana Nuttall ssp incompta (Nuttall) Keck |
ASTERACEAE |
| Asclepias arenaria Torrey |
ASCLEPIADACEAE |
| Asclepias asperula (Decaisne) Woodson ssp asperula |
ASCLEPIADACEAE |
| Asclepias engelmanniana Woodson |
ASCLEPIADACEAE |
| Asclepias involucrata Engelmann ex Torrey |
ASCLEPIADACEAE |
| Asclepias latifolia (Torrey) Rafinesque |
ASCLEPIADACEAE |
| Asclepias macrotis Torrey |
ASCLEPIADACEAE |
| Asclepias pumila (A. Gray) Vail |
ASCLEPIADACEAE |
| Asclepias subverticillata (A. Gray) Vail |
ASCLEPIADACEAE |
| Asclepias uncialis Greene |
ASCLEPIADACEAE |
| Asclepias viridiflora Rafinesque |
ASCLEPIADACEAE |
| Asplenium platyneuron (L.) Britton, Sterns, & Poggenberg |
ASPLENIACEAE |
| Asplenium resiliens Kunze |
ASPLENIACEAE |
| Asplenium trichomanes L. |
ASPLENIACEAE |
| Astragalus bisulcatus (Hooker) A. Gray |
FABACEAE |
| Astragalus ceramicus Sheldon var filifolius (A. Gray) F. J. Hermann |
FABACEAE |
| Astragalus crassicarpus Nuttall |
FABACEAE |
| Astragalus gracilis Nuttall |
FABACEAE |
| Astragalus lotiflorus Hooker |
FABACEAE |
| Astragalus missouriensis Nuttall |
FABACEAE |
| Astragalus mollissimus Torrey |
FABACEAE |
| Astragalus nuttallianus De Candolle |
FABACEAE |
| Astragalus pectinatus (Hooker) Douglas in Hooker |
FABACEAE |
| Astragalus puniceus Osterhout |
FABACEAE |
| Avena fatua L. var sativa (L.) Haussknecht |
POACEAE |
| Baccharis salicina Torrey & Gray |
ASTERACEAE |
| Baccharis wrightii A. Gray |
ASTERACEAE |
| Bassia sieversiana (Pallas) W. A. Weber |
CHENOPODIACEAE |
| Batrachium circinatum (Sibthorp) E. Fries ssp subrigidum (Drew) Löve & Löve |
RANUNCULACEAE |
| Berlandiera lyrata Bentham |
ASTERACEAE |
| Berula erecta (Hudson) Coville |
APIACEAE |
| Bidens bigelovii A. Gray |
ASTERACEAE |
| Bidens cernua L. |
ASTERACEAE |
| Bidens frondosa L. |
ASTERACEAE |
| Bothriochloa ischaemum (L.) Keng var songarica (Ruprecht ex Fischer & Meyer) Celarier & Harlan |
POACEAE |
| Bothriochloa laguroides (De Candolle) Herter ssp torreyana (Steudel) Allred & Gould |
POACEAE |
| Bothriochloa springfieldii Gould |
POACEAE |
| Bouteloua curtipendula (Michaux) Torrey |
POACEAE |
| Bouteloua curtipendula (Michaux) Torrey var caespitosa Gould & Kapadia |
POACEAE |
| Brickellia brachyphylla A. Gray |
ASTERACEAE |
| Brickellia californica (Torrey & Gray) A. Gray |
ASTERACEAE |
| Brickellia eupatorioides (L.) Shinners |
ASTERACEAE |
| Brickellia grandiflora (Hooker) Nuttall |
ASTERACEAE |
| Brickellia rosmarinifolia (Ventenat) W. A. Weber ssp chlorolepis (Wooton & Standley) W. A. Weber |
ASTERACEAE |
| Bromopsis inermis (Leysser) Holub |
POACEAE |
| Bromus japonicus Thunberg |
POACEAE |
| Buchloë dactyloides (Nuttall) Engelmann |
POACEAE |
| Caesalpinia jamesii (Torrey & Gray) Fisher |
FABACEAE |
| Calamovilfa gigantea (Nuttall) Scribner & Merrill |
POACEAE |
| Calylophus hartwegii (Bentham) Raven ssp pubescens (A. Gray) Towner & Raven |
ONAGRACEAE |
| Calylophus lavandulifolius (Torrey & Gray) Raven |
ONAGRACEAE |
| Calylophus serrulatus (Nuttall) Raven |
ONAGRACEAE |
| Camelina microcarpa Andrzejowski ex De Candolle |
BRASSICACEAE |
| Camelina rumelica Velenovsky |
BRASSICACEAE |
| Carex brevior (Dewey) Mackenzie |
CYPERACEAE |
| Carex gravida L. H. Bailey var lunelliana (Mackenzie) F. J. Hermann |
CYPERACEAE |
| Carex hystericina Mühlenberg ex Willdenow |
CYPERACEAE |
| Carex occidentalis L. H. Bailey |
CYPERACEAE |
| Carex pensylvanica Lamarck ssp heliophila (Mackenzie) W. A. Weber |
CYPERACEAE |
| Carex vulpinoidea Michaux |
CYPERACEAE |
| Castilleja sessiliflora Pursh |
SCROPHULARIACEAE |
| Celtis reticulata Torrey |
ULMACEAE |
| Cenchrus longispinus (Hackel in Kneucker) Fernald |
POACEAE |
| Cerasus pumila (L.) Michaux ssp besseyi (L. H. Bailey) W. A. Weber |
ROSACEAE |
| Cercocarpus montanus Rafinesque |
ROSACEAE |
| Chaetopappa ericoides (A. Gray) Nesom |
ASTERACEAE |
| Chamaesaracha conioides (Moricand) Britton |
SOLANACEAE |
| Chamaesyce fendleri (Torrey & Gray) Small |
EUPHORBIACEAE |
| Chamaesyce glyptosperma (Engelmann) Small |
EUPHORBIACEAE |
| Chamaesyce lata (Engelmann) Small |
EUPHORBIACEAE |
| Chamaesyce missurica (Rafinesque) Shinners |
EUPHORBIACEAE |
| Chamaesyce serpyllifolia (Persoon) Small |
EUPHORBIACEAE |
| Chamaesyce stictospora (Engelmann) Small |
EUPHORBIACEAE |
| Cheilanthes eatonii J. G. Baker in Hooker & Baker |
PTERIDACEAE |
| Cheilanthes féei T. Moore |
PTERIDACEAE |
| Cheilanthes wootonii Maxon |
PTERIDACEAE |
| Chenopodium berlandieri Moquin |
CHENOPODIACEAE |
| Chenopodium desiccatum A. Nelson |
CHENOPODIACEAE |
| Chenopodium fremontii S. Watson |
CHENOPODIACEAE |
| Chenopodium incanum (S. Watson) Heller |
CHENOPODIACEAE |
| Chenopodium leptophyllum (Nuttall ex Moquin) S. Watson |
CHENOPODIACEAE |
| Chenopodium simplex (Torrey) Rafinesque |
CHENOPODIACEAE |
| Chloris verticillata Nuttall |
POACEAE |
| Chloris virgata Swartz |
POACEAE |
| Chondrosum eriopodum Torrey |
POACEAE |
| Chondrosum gracile Humboldt, Bonpland, & Kunth |
POACEAE |
| Chondrosum hirsutum (Lagasca) Sweet |
POACEAE |
| Chorispora tenella (Pallas) De Candolle |
BRASSICACEAE |
| Chrysothamnus nauseosus (Pallas ex Pursh) Britton ssp graveolens (Nuttall) Piper |
ASTERACEAE |
| Chrysothamnus nauseosus (Pallas ex Pursh) Britton ssp nauseosus |
ASTERACEAE |
| Chrysothamnus pulchellus (A. Gray) Greene ssp baileyi (Wooton & Standley) Hall & Clements |
ASTERACEAE |
| Cirsium canescens Nuttall |
ASTERACEAE |
| Cirsium ochrocentrum A. Gray |
ASTERACEAE |
| Cirsium undulatum (Nuttall) Sprengel |
ASTERACEAE |
| Cladothrix lanuginosa (Nuttall ex Moquin) Bentham & Hooker |
AMARANTHACEAE |
| Cleome serrulata Pursh |
CAPPARACEAE |
| Comandra umbellata (L.) Nuttall ssp pallida (A. De Candolle) Piehl |
SANTALACEAE |
| Commelina erecta L. var angustifolia (Michaux) Fernald |
COMMELINACEAE |
| Conium maculatum L. |
APIACEAE |
| Convolvulus arvensis L. |
CONVOLVULACEAE |
| Convolvulus equitans Bentham |
CONVOLVULACEAE |
| Conyza canadensis (L.) Cronquist |
ASTERACEAE |
| Corispermum americanum (Nuttall) Nuttall |
CHENOPODIACEAE |
| Corispermum hyssopifolium L. |
CHENOPODIACEAE |
| Corydalis aurea Willdenow |
FUMARIACEAE |
| Corydalis curvisiliqua Engelmann subsp. occidentalis (Engelmann ex A. Gray) W. A. Weber |
FUMARIACEAE |
| Critesion glaucum (Steudel) Löve |
POACEAE |
| Critesion jubatum (L.) Nevski |
POACEAE |
| Critesion pusillum (Nuttall) Löve |
POACEAE |
| Croton texensis (Klotsch) Müller-Argoviensis in De Candolle |
EUPHORBIACEAE |
| Cryptantha crassisepala (Torrey & Gray) Greene |
BORAGINACEAE |
| Cryptantha crassisepala (Torrey & Gray) Greene var crassisepala |
BORAGINACEAE |
| Cryptantha minima Rydberg |
BORAGINACEAE |
| Cucurbita foetidissima Humboldt, Bonpland, & Kunth |
CUCURBITACEAE |
| Cyclachaena xanthifolia (Nuttall) Fresenius |
ASTERACEAE |
| Cyclanthera dissecta (Torrey & Gray) Arnott |
CUCURBITACEAE |
| Cycloloma atriplicifolium (Sprengel) Coulter |
CHENOPODIACEAE |
| Cylindropyrum cylindricum (Host) Löve |
POACEAE |
| Cymopterus acaulis (Pursh) Rafinesque |
APIACEAE |
| Cymopterus montanus Torrey & Gray |
APIACEAE |
| Cyperus esculentus L. |
CYPERACEAE |
| Cystopteris fragilis (L.) Bernhardi |
DRYOPTERIDACEAE |
| Dactylis glomerata L. |
POACEAE |
| Dalea aurea Nuttall ex Pursh |
FABACEAE |
| Dalea candida Willdenow var oligophylla (Torrey) Shinners |
FABACEAE |
| Dalea cylindriceps Barneby |
FABACEAE |
| Dalea enneandra Nuttall |
FABACEAE |
| Dalea formosa Torrey |
FABACEAE |
| Dalea jamesii (Torrey) Torrey & Gray |
FABACEAE |
| Dalea lanata Sprengel |
FABACEAE |
| Dalea nana Torrey var nana |
FABACEAE |
| Dalea purpurea Ventenat |
FABACEAE |
| Dalea tenuifolia (A. Gray) Shinners |
FABACEAE |
| Dalea villosa Sprengel |
FABACEAE |
| Delphinium carolinianum Walter ssp virescens (Nuttall) R. Brooks |
HELLEBORACEAE |
| Descurainia pinnata (Walter) Britton subsp. halictorum (Cockerell) Detling |
BRASSICACEAE |
| Descurainia sophia (L.) Webb ex Prantl |
BRASSICACEAE |
| Desmanthus cooleyi (A. Eaton) Trelease |
FABACEAE |
| Desmanthus illinoensis (Michaux) MacMillan ex Robinson & Fernald |
FABACEAE |
| Dichanthelium linearifolium (Scribner) Gould |
POACEAE |
| Dichanthelium oligosanthes (Schultes) Gould var scribnerianum (Nash) Gould |
POACEAE |
| Diplachne fascicularis (Lamarck) P. Beauvois |
POACEAE |
| Distichlis stricta (Torrey) Rydberg |
POACEAE |
| Dryopteris filix-mas (L.) Schott |
DRYOPTERIDACEAE |
| Dyssodia papposa (Ventenat) A. S. Hitchcock |
ASTERACEAE |
| Echinacea angustifolia De Candolle |
ASTERACEAE |
| Echinocereus reichenbachii (Terschek) Haage var perbellus (Britton & Rose) L. Benson |
CACTACEAE |
| Echinocereus viridiflorus Engelmann |
CACTACEAE |
| Echinochloa crus-galli (L.) P. Beauvois |
POACEAE |
| Elaeagnus angustifolia L. |
ELAEAGNACEAE |
| Eleocharis palustris (L.) Roemer & Schultes |
CYPERACEAE |
| Ellisia nyctelea (L.) L. |
HYDROPHYLLACEAE |
| Elymus canadensis L. |
POACEAE |
| Elymus elymoides (Rafinesque) Swezey |
POACEAE |
| Elymus longifolius (J. G. Smith) Gould |
POACEAE |
| Engelmannia peristenia (Rafinesque) Goodman & Lawson |
ASTERACEAE |
| Eragrostis cilianensis (Allioni) F. T. Hubbard |
POACEAE |
| Eragrostis minor Host |
POACEAE |
| Eragrostis secundiflora J. Presl in K. Presl ssp oxylepis (Torrey) S. D. Koch |
POACEAE |
| Eragrostis spectabilis (Pursh) Steudel |
POACEAE |
| Eragrostis trichodes (Nuttall) Wood |
POACEAE |
| Eremogone hookeri (Nuttall ex Torrey & Gray) W. A. Weber |
ALSINACEAE |
| Eremogone hookeri (Nuttall ex Torrey & Gray) W. A. Weber ssp pinetorum (A. Nelson) W. A. Weber |
ALSINACEAE |
| Erigeron bellidiastrum Nuttall |
ASTERACEAE |
| Erigeron canus A. Gray |
ASTERACEAE |
| Erigeron colo-mexicanus A. Nelson |
ASTERACEAE |
| Erigeron divergens Torrey & Gray |
ASTERACEAE |
| Eriogonum annuum Nuttall |
POLYGONACEAE |
| Eriogonum jamesii Bentham in A. De Candolle |
POLYGONACEAE |
| Eriogonum lachnogynum Torrey ex Bentham in A. De Candolle |
POLYGONACEAE |
| Eriogonum tenellum Torrey |
POLYGONACEAE |
| Erioneuron pilosum (Buckley) Nash |
POACEAE |
| Erysimum asperum (Nuttall) De Candolle |
BRASSICACEAE |
| Erysimum repandum L. |
BRASSICACEAE |
| Euploca convolvulacea Nuttall ssp convolvulacea |
BORAGINACEAE |
| Evax prolifera Nuttall ex De Candolle |
ASTERACEAE |
| Evolvulus nuttallianus Schultes |
CONVOLVULACEAE |
| Festuca pratensis Hudson |
POACEAE |
| Frasera coloradensis (C. M. Rogers) D. Post |
GENTIANACEAE |
| Froelichia floridana (Nuttall) Moquin var campestris (Small) Fernald |
AMARANTHACEAE |
| Froelichia gracilis (Hooker) Moquin |
AMARANTHACEAE |
| Gaillardia pinnatifida Torrey |
ASTERACEAE |
| Gaillardia pulchella Fougeroux |
ASTERACEAE |
| Gaura coccinea Nuttall ex Pursh |
ONAGRACEAE |
| Gaura mollis James |
ONAGRACEAE |
| Gaura villosa Torrey |
ONAGRACEAE |
| Giliastrum rigidulum (Bentham) Rydberg ssp acerosum (A. Gray) W. A. Weber |
POLEMONIACEAE |
| Glandularia bipinnatifida (Nuttall) Nuttall |
VERBENACEAE |
| Gleditsia triacanthos L. |
FABACEAE |
| Glyceria striata (Lamarck) A. S. Hitchcock var stricta (Scribner) Fernald |
POACEAE |
| Glycyrrhiza lepidota Pursh |
FABACEAE |
| Grammica cuspidata (Engelmann) Hadaç & Chrtek |
CUSCUTACEAE |
| Grammica indecora (Choisy) W. A. Weber |
CUSCUTACEAE |
| Grammica indecora (Choisy) W. A. Weber var neuropetala (Engelmann) W. A. Weber |
CUSCUTACEAE |
| Grindelia inornata Greene |
ASTERACEAE |
| Grindelia squarrosa (Pursh) Dunal var nuda (Wood) A. Gray |
ASTERACEAE |
| Guilleminea densa (Willdenow ex Roemer & Schultes) Moquin |
AMARANTHACEAE |
| Gutierrezia sarothrae (Pursh) Britton & Rusby |
ASTERACEAE |
| Halerpestes cymbalaria (Pursh) Greene ssp saximontana (Fernald) Moldenke |
RANUNCULACEAE |
| Harbouria trachypleura (A. Gray) Coulter & Rose |
APIACEAE |
| Hecatonia scelerata (L.) Fourreau |
RANUNCULACEAE |
| Hedeoma drummondii Bentham |
LAMIACEAE |
| Hedysarum boreale Nuttall |
FABACEAE |
| Helianthus annuus L. |
ASTERACEAE |
| Helianthus petiolaris Nuttall |
ASTERACEAE |
| Hesperostipa comata (Trinius & Ruprecht) Barkworth |
POACEAE |
| Hesperostipa neomexicana (Thurber) Barkworth |
POACEAE |
| Heterotheca canescens (De Candolle) Shinners |
ASTERACEAE |
| Heterotheca latifolia Buckley |
ASTERACEAE |
| Heterotheca villosa (Pursh) Shinners |
ASTERACEAE |
| Heterotheca villosa (Pursh) Shinners var. villosa |
ASTERACEAE |
| Hippochaete laevigata (A. Braun) Farwell |
EQUISETACEAE |
| Hoffmanseggia drepanocarpa A. Gray |
FABACEAE |
| Hoffmanseggia glauca (Ortega) Eifert |
FABACEAE |
| Hybanthus verticillatus (Ortega) Baillon |
VIOLACEAE |
| Hymenopappus filifolius Hooker |
ASTERACEAE |
| Hymenopappus flavescens A. Gray |
ASTERACEAE |
| Hymenopappus tenuifolius Pursh |
ASTERACEAE |
| Ipomoea leptophylla Torrey |
CONVOLVULACEAE |
| Ipomopsis laxiflora (Coulter) V. Grant |
POLEMONIACEAE |
| Ipomopsis longiflora (Torrey) V. Grant |
POLEMONIACEAE |
| Ipomopsis spicata (Nuttall) V. Grant |
POLEMONIACEAE |
| Juncus bufonius L. |
JUNCACEAE |
| Juncus dudleyi Wiegand |
JUNCACEAE |
| Juncus nodosus L. |
JUNCACEAE |
| Juncus torreyi Coville |
JUNCACEAE |
| Kallstroemia parviflora Norton |
ZYGOPHYLLACEAE |
| Krameria lanceolata Torrey |
KRAMERIACEAE |
| Lactuca serriola L. |
ASTERACEAE |
| Lappula marginata (Bieberstein) Guerke |
BORAGINACEAE |
| Lappula redowskii (Hornemann) Greene |
BORAGINACEAE |
| Lathyrus eucosmus Butters & St. John |
FABACEAE |
| Lathyrus polymorphus Nuttall ssp incanus (Small & Rydberg) C. L. Hitchcock |
FABACEAE |
| Leersia oryzoides (L.) Swartz |
POACEAE |
| Leiostemon ambiguus (Torrey) Greene |
SCROPHULARIACEAE |
| Lemna minor L. |
LEMNACEAE |
| Lemna minuscula Herter |
LEMNACEAE |
| Lepidium densiflorum Schrader |
BRASSICACEAE |
| Lesquerella ovalifolia Rydberg |
BRASSICACEAE |
| Leucocrinum montanum Nuttall ex A. Gray |
LILIACEAE |
| Liatris punctata Hooker |
ASTERACEAE |
| Linaria genistifolia (L.) P. Miller ssp dalmatica (L.) Maire et al. |
SCROPHULARIACEAE |
| Lithospermum incisum Lehmann |
BORAGINACEAE |
| Lobelia cardinalis L. ssp graminea (Lamarck) McVaugh |
CAMPANULACEAE |
| Lupinus pusillus Pursh ssp pusillus |
FABACEAE |
| Lycium pallidum Miers |
SOLANACEAE |
| Lycopus americanus Mühlenberg ex W. Barton |
LAMIACEAE |
| Lycurus setosus (Nuttall) C. Reeder |
POACEAE |
| Lygodesmia juncea (Pursh) D. Don |
ASTERACEAE |
| Machaeranthera pinnatifida (Hooker) Shinners |
ASTERACEAE |
| Machaeranthera pinnatifida (Hooker) Shinners var glaberrima (Rydberg) Turner & Hartman |
ASTERACEAE |
| Machaeranthera pinnatifida (Hooker) Shinners var. pinnatifida |
ASTERACEAE |
| Machaeranthera tanacetifolia (Humboldt, Bonpland, & Kunth) Nees |
ASTERACEAE |
| Malva neglecta Wallroth |
MALVACEAE |
| Mariscus schweinitzii (Torrey) Koyama |
CYPERACEAE |
| Marrubium vulgare L. |
LAMIACEAE |
| Marsilea vestita Hooker & Greville |
MARSILEACEAE |
| Medicago sativa L. |
FABACEAE |
| Melampodium leucanthum Torrey & Gray |
ASTERACEAE |
| Melilotus albus Medicus |
FABACEAE |
| Melilotus officinale (L.) Pallas |
FABACEAE |
| Mentzelia oligosperma Nuttall ex Sims |
LOASACEAE |
| Mesynium puberulum (Engelmann in A. Gray) W. A. Weber |
LINACEAE |
| Mesynium rigidum (Pursh) Löve & Löve |
LINACEAE |
| Mimosa borealis A. Gray |
FABACEAE |
| Mollugo verticillata L. |
MOLLUGINACEAE |
| Monarda pectinata Nuttall |
LAMIACEAE |
| Monroa squarrosa (Nuttall) Torrey |
POACEAE |
| Muhlenbergia arenicola Buckley |
POACEAE |
| Muhlenbergia asperifolia (Nees & Meyen ex Trinius) Parodi |
POACEAE |
| Muhlenbergia racemosa (Michaux) Britton, Sterns, & Poggenberg |
POACEAE |
| Muhlenbergia torreyi (Kunth) A. S. Hitchcock ex Bush |
POACEAE |
| Nassella viridula (Trinius) Barkworth |
POACEAE |
| Nasturtium officinale R. Brown |
BRASSICACEAE |
| Nothocalais cuspidata (Pursh) Greene |
ASTERACEAE |
| Notholaena standleyi Maxon |
PTERIDACEAE |
| Nuttallia decapetala (Pursh ex Sims) Greene |
LOASACEAE |
| Nuttallia multiflora (Nuttall) Greene |
LOASACEAE |
| Nuttallia nuda (Pursh) Greene |
LOASACEAE |
| Oenothera albicaulis Pursh |
ONAGRACEAE |
| Oenothera elata Humboldt, Bonpland, & Kunth ssp hirsutissima (A. Gray ex S. Watson) Dietrich & Wagner |
ONAGRACEAE |
| Oenothera howardii (A. Nelson) W. L. Wagner |
ONAGRACEAE |
| Oenothera latifolia (Rydberg) Munz |
ONAGRACEAE |
| Oenothera villosa Thunberg ssp strigosa (Rydberg) Dietrich & Raven |
ONAGRACEAE |
| Oligosporus caudatus (Michaux) Poljakov |
ASTERACEAE |
| Oligosporus dracunculus (L.) Poljakov ssp dracunculinus (S. Watson) W. A. Weber |
ASTERACEAE |
| Oligosporus filifolius (Torrey) Poljakov |
ASTERACEAE |
| Onosmodium molle Michaux ssp occidentale (Mackenzie) Cochrane |
BORAGINACEAE |
| Opuntia fragilis (Nuttall) Haworth |
CACTACEAE |
| Opuntia macrorhiza Engelmann |
CACTACEAE |
| Opuntia phaeacantha Engelmann |
CACTACEAE |
| Opuntia polyacantha Haworth var. polyacantha |
CACTACEAE |
| Oreobatus deliciosus James ex Torrey subsp. neomexicanus (Gray) W. A. Weber |
ROSACEAE |
| Oreocarya suffruticosa (Torrey) Greene |
BORAGINACEAE |
| Oreocarya thyrsiflora Greene |
BORAGINACEAE |
| Oxalis dillenii Jacquin |
OXALIDACEAE |
| Oxybaphus aggregatus (Ortega) Vahl |
NYCTAGINACEAE |
| Oxybaphus carletonii (Standley) Weatherby |
NYCTAGINACEAE |
| Oxybaphus exaltatus (Standley) Weatherby |
NYCTAGINACEAE |
| Oxybaphus glaber S. Watson |
NYCTAGINACEAE |
| Oxybaphus linearis (Pursh) B. L. Robinson |
NYCTAGINACEAE |
| Oxybaphus nyctagineus (Michaux) T. C. Porter in Porter & Coulter |
NYCTAGINACEAE |
| Oxytropis lambertii Pursh |
FABACEAE |
| Oxytropis lambertii Pursh ssp lambertii |
FABACEAE |
| Oönopsis engelmannii (A. Gray) Greene |
ASTERACEAE |
| Packera plattensis (Nuttall) Weber & Löve |
ASTERACEAE |
| Packera tridenticulata (Rydberg) Weber & Löve |
ASTERACEAE |
| Padus virginiana (L.) P. Miller ssp melanocarpa (A. Nelson) W. A. Weber |
ROSACEAE |
| Palafoxia rosea (Bush) Cory var macrolepis (Rydberg) B. Turner |
ASTERACEAE |
| Palafoxia sphacelata (Nuttall ex Torrey) Cory |
ASTERACEAE |
| Panicum capillare L. |
POACEAE |
| Panicum hillmanii Chase |
POACEAE |
| Panicum obtusum Humboldt, Bonpland, & Kunth |
POACEAE |
| Panicum virgatum L. |
POACEAE |
| Parietaria pensylvanica Mühlenberg ex Willdenow |
URTICACEAE |
| Paronychia jamesii Torrey & Gray |
ALSINACEAE |
| Parthenocissus vitacea (Knerr) A. S. Hitchcock |
VITACEAE |
| Pascopyrum smithii (Rydberg) Löve |
POACEAE |
| Paspalum setaceum Michaux var stramineum (Nash) D. Banks |
POACEAE |
| Pectis angustifolia Torrey |
ASTERACEAE |
| Pediomelum hypogaeum (Nuttall ex Torrey & Gray) Rydberg |
FABACEAE |
| Pellaea atropurpurea (L.) Link |
PTERIDACEAE |
| Pellaea wrightiana Hooker |
PTERIDACEAE |
| Penstemon albidus Nuttall |
SCROPHULARIACEAE |
| Penstemon angustifolius Nuttall ex Pursh ssp caudatus (Heller) Keck |
SCROPHULARIACEAE |
| Penstemon cobaea Nuttall |
SCROPHULARIACEAE |
| Penstemon versicolor Pennell |
SCROPHULARIACEAE |
| Pericome caudata A. Gray var glandulosa (Goodman) Harrington |
ASTERACEAE |
| Persicaria bicornis (Rafinesque) Nieuwland |
POLYGONACEAE |
| Persicaria hydropiper (L.) Opiz |
POLYGONACEAE |
| Persicaria lapathifolia (L.) S. Gray |
POLYGONACEAE |
| Persicaria pensylvanica (L.) Gomez |
POLYGONACEAE |
| Persicaria punctata (Elliott) Small |
POLYGONACEAE |
| Phalaris caroliniana Walter |
POACEAE |
| Phyla cuneifolia (Torrey) Greene |
VERBENACEAE |
| Physalis hederifolia A. Gray var. comata (Rydberg) Waterfall |
SOLANACEAE |
| Physalis pumila Nuttall ssp hispida (Waterfall) Hinton |
SOLANACEAE |
| Physalis virginiana P. Miller |
SOLANACEAE |
| Picradenia odorata (De Candolle) Britton |
ASTERACEAE |
| Picradeniopsis oppositifolia (Nuttall) Rydberg |
ASTERACEAE |
| Picradeniopsis woodhousei (A. Gray) Rydberg |
ASTERACEAE |
| Pinus edulis Engelmann |
PINACEAE |
| Pinus ponderosa Douglas ex P. & C. Lawson ssp scopulorum (S. Watson) W. A. Weber |
PINACEAE |
| Piptatherum micranthum (Trinius & Ruprecht) Barkworth |
POACEAE |
| Plantago patagonica Jacquin |
PLANTAGINACEAE |
| Poa fendleriana (Steudel) Vasey |
POACEAE |
| Poa pratensis L. |
POACEAE |
| Podospermum laciniatum (L.) De Candolle |
ASTERACEAE |
| Poinsettia dentata (Michaux) Klotsch & Garcke |
EUPHORBIACEAE |
| Polanisia dodecandra (L.) De Candolle |
CAPPARACEAE |
| Polygala alba Nuttall |
POLYGALACEAE |
| Polygonum argyrocoleon Steudel ex Kuntze |
POLYGONACEAE |
| Polygonum ramosissimum Michaux |
POLYGONACEAE |
| Polypogon monspeliensis (L.) Desfontaines |
POACEAE |
| Populus deltoides H. Marshall ssp monilifera (Aiton) Eckenwalder |
SALICACEAE |
| Portulaca oleracea L. |
PORTULACACEAE |
| Prionopsis ciliata (Nuttall) Nuttall |
ASTERACEAE |
| Proboscidea louisianica (P. Miller) Thellung |
MARTYNIACEAE |
| Prosopis glandulosa Torrey |
FABACEAE |
| Prunus americana H. Marshall |
ROSACEAE |
| Prunus angustifolia H. Marshall |
ROSACEAE |
| Prunus gracilis Engelmann & Gray |
ROSACEAE |
| Prunus rivularis Scheele |
ROSACEAE |
| Pseudognaphalium canescens (De Candolle) W. A. Weber |
ASTERACEAE |
| Psoralidium lanceolatum (Pursh) Rydberg |
FABACEAE |
| Psoralidium tenuiflorum (Pursh) Rydberg |
FABACEAE |
| Quercus gambelii Nuttall |
FAGACEAE |
| Quercus grisea Liebmann |
FAGACEAE |
| Quincula lobata (Torrey) Rafinesque |
SOLANACEAE |
| Ranunculus macounii Britton |
RANUNCULACEAE |
| Ratibida columnifera (Nuttall) Wooton & Standley |
ASTERACEAE |
| Ratibida tagetes (James) Barnhart |
ASTERACEAE |
| Redfieldia flexuosa (Thurber ex A. Gray) Vasey |
POACEAE |
| Rhus aromatica Aiton ssp pilosissima (Engelmann) W. A. Weber |
ANACARDIACEAE |
| Rhus aromatica Aiton ssp trilobata (Nuttall ex Torrey & Gray) W. A. Weber |
ANACARDIACEAE |
| Ribes aureum Pursh |
GROSSULARIACEAE |
| Ribes cereum Douglas |
GROSSULARIACEAE |
| Ribes leptanthum A. Gray |
GROSSULARIACEAE |
| Rorippa sinuata (Nuttall in Torrey & Gray) A. S. Hitchcock |
BRASSICACEAE |
| Rosa arkansana T. C. Porter |
ROSACEAE |
| Rumex crispus L. |
POLYGONACEAE |
| Rumex triangulivalvis (Danser) Rechinger f. |
POLYGONACEAE |
| Rumex venosus Pursh |
POLYGONACEAE |
| Sabina monosperma (Engelmann) Rydberg |
CUPRESSACEAE |
| Sabina scopulorum (Sargent) Rydberg |
CUPRESSACEAE |
| Sagittaria cuneata Sheldon |
ALISMATACEAE |
| Salix amygdaloides Andersson |
SALICACEAE |
| Salix exigua Nuttall ssp interior (Rowlee) Cronquist |
SALICACEAE |
| Salix exigua Nuttall var pedicellata (Andersson) Cronquist |
SALICACEAE |
| Salix nigra Marshall |
SALICACEAE |
| Salsola australis R. Brown |
CHENOPODIACEAE |
| Salsola collina Pallas |
CHENOPODIACEAE |
| Salvia reflexa Hornemann |
LAMIACEAE |
| Sapindus drummondii Hooker & Arnott |
SAPINDACEAE |
| Schedonnardus paniculatus (Nuttall) Trelease |
POACEAE |
| Schizachyrium scoparium (Michaux) Nash |
POACEAE |
| Schoenoplectus acutus (Mühlenberg) Löve & Löve |
CYPERACEAE |
| Schoenoplectus pungens (M. Vahl) Palla |
CYPERACEAE |
| Schrankia occidentalis (Wooton & Standley) Standley |
FABACEAE |
| Schrankia uncinata Willdenow |
FABACEAE |
| Scirpus pallidus (Britton) Fernald |
CYPERACEAE |
| Secale cereale L. |
POACEAE |
| Selaginella densa Rydberg |
SELAGINELLACEAE |
| Selaginella underwoodii Hieronymus |
SELAGINELLACEAE |
| Senecio flaccidus Lessing var. douglasii (DeCandolle) Turner & Barkley |
ASTERACEAE |
| Senecio riddellii Torrey & Gray |
ASTERACEAE |
| Setaria glauca (L.) P. Beauvois |
POACEAE |
| Setaria leucopila (Scribner & Merrill) K. Schumann |
POACEAE |
| Setaria viridis (L.) P. Beauvois |
POACEAE |
| Silene antirrhina L. |
CARYOPHYLLACEAE |
| Sisymbrium altissimum L. |
BRASSICACEAE |
| Solanum americanum P. Miller |
SOLANACEAE |
| Solanum elaeagnifolium Cavanilles |
SOLANACEAE |
| Solanum rostratum Dunal |
SOLANACEAE |
| Solidago gigantea Aiton |
ASTERACEAE |
| Solidago missouriensis Nuttall |
ASTERACEAE |
| Solidago mollis Bartling |
ASTERACEAE |
| Solidago nana Nuttall |
ASTERACEAE |
| Solidago velutina De Candolle |
ASTERACEAE |
| Solidago wrightii A. Gray var adenophora S. F. Blake |
ASTERACEAE |
| Sonchus asper (L.) J. Hill |
ASTERACEAE |
| Sonchus oleraceus L. |
ASTERACEAE |
| Sorghastrum avenaceum (Michaux) Nash |
POACEAE |
| Sorghum halepense (L.) Persoon |
POACEAE |
| Sphaeralcea angustifolia (Cavanilles) G. Don var cuspidata A. Gray |
MALVACEAE |
| Sphaeralcea coccinea (Pursh) Rydberg |
MALVACEAE |
| Sphenopholis obtusata (Michaux) Scribner |
POACEAE |
| Sporobolus asper (Michaux) Kunth |
POACEAE |
| Sporobolus cryptandrus (Torrey) A. Gray |
POACEAE |
| Sporobolus giganteus Nash |
POACEAE |
| Sporobolus neglectus Nash |
POACEAE |
| Stanleya pinnata (Pursh) Britton |
BRASSICACEAE |
| Stenosiphon linifolius (Nuttall in F. James) Heynhold |
ONAGRACEAE |
| Stephanomeria pauciflora (Torrey) A. Nelson |
ASTERACEAE |
| Stillingia sylvatica Garden ex L. |
EUPHORBIACEAE |
| Strophostyles leiosperma (Torrey & Gray) Piper |
FABACEAE |
| Talinum parviflorum Nuttall ex Torrey & Gray |
PORTULACACEAE |
| Tamarix parviflora De Candolle |
TAMARICACEAE |
| Tamarix ramosissima Ledebour |
TAMARICACEAE |
| Taraxacum officinale G. H. Weber ex Wiggers |
ASTERACEAE |
| Tetraneuris acaulis (Pursh) Greene |
ASTERACEAE |
| Tetraneuris scaposa (De Candolle) Greene |
ASTERACEAE |
| Teucrium laciniatum Torrey |
LAMIACEAE |
| Thelesperma filifolium (Hooker) A. Gray var intermedium (Rydberg) Shinners |
ASTERACEAE |
| Thelesperma megapotamicum (Sprengel) Kuntze |
ASTERACEAE |
| Thelypodium wrightii A. Gray ssp oklahomensis Al-Shehbaz |
BRASSICACEAE |
| Townsendia exscapa (Richardson) T. C. Porter |
ASTERACEAE |
| Toxicodendron rydbergii (Small ex Rydberg) Greene |
ANACARDIACEAE |
| Tradescantia occidentalis (Britton) Smyth var scopulorum (Rose) Anderson & Woodson |
COMMELINACEAE |
| Tragia ramosa (Müller-Argoviensis in De Candolle) Torrey |
EUPHORBIACEAE |
| Tragopogon dubius Scopoli ssp major (Jacquin) Vollmann |
ASTERACEAE |
| Tribulus terrestris L. |
ZYGOPHYLLACEAE |
| Tridens muticus (Torrey) Nash var elongatus (Buckley) Shinners |
POACEAE |
| Trifolium fragiferum L. |
FABACEAE |
| Triplasis purpurea (Walter) Chapman |
POACEAE |
| Triticum aestivum L. |
POACEAE |
| Typha angustifolia L. |
TYPHACEAE |
| Typha domingensis Persoon |
TYPHACEAE |
| Ulmus pumila L. |
ULMACEAE |
| Urtica gracilis Aiton ssp gracilis |
URTICACEAE |
| Verbascum thapsus L. |
SCROPHULARIACEAE |
| Verbena bracteata Lagasca & Rodriguez |
VERBENACEAE |
| Verbena hastata L. |
VERBENACEAE |
| Verbena plicata Greene |
VERBENACEAE |
| Verbena stricta Ventenat |
VERBENACEAE |
| Vernonia marginata (Torrey) Rafinesque |
ASTERACEAE |
| Veronica catenata Pennell |
SCROPHULARIACEAE |
| Veronica peregrina L. ssp xalapensis (Humboldt,_Bonpland, & Kunth) Pennell |
SCROPHULARIACEAE |
| Vexibia nuttalliana (B. Turner) W. A. Weber |
FABACEAE |
| Viola nuttallii Pursh |
VIOLACEAE |
| Viola sororia Willdenow |
VIOLACEAE |
| Virgulus ericoides (L.) Reveal & Keener |
ASTERACEAE |
| Vitis acerifolia Rafinesque |
VITACEAE |
| Vulpia octoflora (Walter) Rydberg |
POACEAE |
| Woodsia oregana D.C. Eaton |
DRYOPTERIDACEAE |
| Woodsia oregana D.C. Eaton ssp cathcartiana (Robbinson) Windham |
DRYOPTERIDACEAE |
| Woodsia plummerae Lemmon |
DRYOPTERIDACEAE |
| Xanthium strumarium L. |
ASTERACEAE |
| Ximenesia encelioides Cavanilles |
ASTERACEAE |
| Yucca glauca Nuttall in Fraser |
AGAVACEAE |
| Zannichellia palustris L. |
ZANNICHELLIACEAE |
| Zinnia grandiflora Nuttall |
ASTERACEAE |
