341 Records
| Citation | Family Name |
| Achnatherum hymenoides (Roemer & Schultes) Barkworth |
POACEAE |
| Agaloma marginata (Pursh) Löve & Löve |
EUPHORBIACEAE |
| Agropyron desertorum Fischer ex Link |
POACEAE |
| Agrostis stolonifera L. |
POACEAE |
| 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 |
| Ambrosia acanthicarpa Hooker |
ASTERACEAE |
| Ambrosia artemisiifolia L. var elatior (L.) Descourtils |
ASTERACEAE |
| Ambrosia psilostachya De Candolle var coronopifolia (Torrey & Gray) Farwell |
ASTERACEAE |
| Andropogon hallii Hackel |
POACEAE |
| Anisantha tectorum (L.) Nevski |
POACEAE |
| Antennaria parvifolia Nuttall |
ASTERACEAE |
| Apocynum cannabinum L. |
APOCYNACEAE |
| Argemone polyanthemos (Fedde) G. Ownbey |
PAPAVERACEAE |
| Aristida adscensionis L. |
POACEAE |
| Aristida purpurea Nuttall var longiseta (Steudel) Vasey |
POACEAE |
| Artemisia frigida Willdenow |
ASTERACEAE |
| Artemisia ludoviciana Nuttall ssp ludoviciana |
ASTERACEAE |
| Asclepias arenaria Torrey |
ASCLEPIADACEAE |
| Asclepias engelmanniana Woodson |
ASCLEPIADACEAE |
| Asclepias incarnata L. |
ASCLEPIADACEAE |
| Asclepias latifolia (Torrey) Rafinesque |
ASCLEPIADACEAE |
| Asclepias pumila (A. Gray) Vail |
ASCLEPIADACEAE |
| Asclepias speciosa Torrey |
ASCLEPIADACEAE |
| Asclepias subverticillata (A. Gray) Vail |
ASCLEPIADACEAE |
| Asclepias viridiflora Rafinesque |
ASCLEPIADACEAE |
| Asparagus officinalis L. |
ASPARAGACEAE |
| Astragalus bisulcatus (Hooker) A. Gray |
FABACEAE |
| Astragalus ceramicus Sheldon |
FABACEAE |
| Astragalus ceramicus Sheldon var filifolius (A. Gray) F. J. Hermann |
FABACEAE |
| Astragalus drummondii Douglas ex Hooker |
FABACEAE |
| Astragalus gracilis Nuttall |
FABACEAE |
| Astragalus lotiflorus Hooker |
FABACEAE |
| Astragalus missouriensis Nuttall var missouriensis |
FABACEAE |
| Astragalus mollissimus Torrey var mollissimus |
FABACEAE |
| Atriplex argentea Nuttall |
CHENOPODIACEAE |
| Bassia sieversiana (Pallas) W. A. Weber |
CHENOPODIACEAE |
| Bidens cernua L. |
ASTERACEAE |
| Bidens comosa (A. Gray) Wiegand |
ASTERACEAE |
| Bidens frondosa L. |
ASTERACEAE |
| Bothriochloa bladhii (Retzius) S. T. Blake |
POACEAE |
| Bothriochloa ischaemum (L.) Keng var songarica (Ruprecht ex Fischer & Meyer) Celarier & Harlan |
POACEAE |
| Bothriochloa laguroides (De Candolle) Herter ssp torreyana (Steudel) Allred & Gould |
POACEAE |
| Bouteloua curtipendula (Michaux) Torrey |
POACEAE |
| Bouteloua curtipendula (Michaux) Torrey var curtipendula |
POACEAE |
| Brachyactis ciliata Ledebour ssp angusta (Lindley) A. Jones |
ASTERACEAE |
| Breea arvensis (L.) Lessing |
ASTERACEAE |
| Brickellia eupatorioides (L.) Shinners |
ASTERACEAE |
| Bromopsis inermis (Leysser) Holub |
POACEAE |
| Bromus japonicus Thunberg |
POACEAE |
| Buchloë dactyloides (Nuttall) Engelmann |
POACEAE |
| Caesalpinia jamesii (Torrey & Gray) Fisher |
FABACEAE |
| Calamovilfa longifolia (Hooker) Scribner in Hackel |
POACEAE |
| Callirhoë involucrata (Torrey & Gray) A. Gray |
MALVACEAE |
| Calylophus lavandulifolius (Torrey & Gray) Raven |
ONAGRACEAE |
| Calylophus serrulatus (Nuttall) Raven |
ONAGRACEAE |
| Camelina microcarpa Andrzejowski ex De Candolle |
BRASSICACEAE |
| Capsella bursa-pastoris (L.) Medicus |
BRASSICACEAE |
| Cardaria draba (L.) Desvaux |
BRASSICACEAE |
| Carduus nutans L. ssp macrolepis (Peterman) Kazmi |
ASTERACEAE |
| Carex gravida L. H. Bailey var lunelliana (Mackenzie) F. J. Hermann |
CYPERACEAE |
| Carex pensylvanica Lamarck ssp heliophila (Mackenzie) W. A. Weber |
CYPERACEAE |
| Carex praegracilis F. Boott |
CYPERACEAE |
| Carex stenophylla Wahlenberg ssp eleocharis (L. H. Bailey) Hultén |
CYPERACEAE |
| Cenchrus longispinus (Hackel in Kneucker) Fernald |
POACEAE |
| Chaetopappa ericoides (A. Gray) Nesom |
ASTERACEAE |
| Chamaesyce fendleri (Torrey & Gray) Small |
EUPHORBIACEAE |
| Chamaesyce glyptosperma (Engelmann) Small |
EUPHORBIACEAE |
| Chamaesyce missurica (Rafinesque) Shinners |
EUPHORBIACEAE |
| Chamaesyce serpyllifolia (Persoon) Small |
EUPHORBIACEAE |
| Chamaesyce stictospora (Engelmann) Small |
EUPHORBIACEAE |
| Chenopodium berlandieri Moquin |
CHENOPODIACEAE |
| Chenopodium glaucum L. |
CHENOPODIACEAE |
| Chenopodium incanum (S. Watson) Heller |
CHENOPODIACEAE |
| Chenopodium pratericola Rydberg |
CHENOPODIACEAE |
| Chenopodium subglabrum (S. Watson) A. Nelson |
CHENOPODIACEAE |
| Chloris verticillata Nuttall |
POACEAE |
| Chloris virgata Swartz |
POACEAE |
| Chondrosum gracile Humboldt, Bonpland, & Kunth |
POACEAE |
| Chondrosum hirsutum (Lagasca) Sweet |
POACEAE |
| Chondrosum prostratum (Lagasca) Sweet |
POACEAE |
| Chrysothamnus nauseosus (Pallas ex Pursh) Britton ssp graveolens (Nuttall) Piper |
ASTERACEAE |
| Cirsium canescens Nuttall |
ASTERACEAE |
| Cirsium ochrocentrum A. Gray |
ASTERACEAE |
| Cirsium undulatum (Nuttall) Sprengel |
ASTERACEAE |
| Cirsium vulgare (Savi) Tenore |
ASTERACEAE |
| Cleome serrulata Pursh |
CAPPARACEAE |
| Comandra umbellata (L.) Nuttall ssp pallida (A. De Candolle) Piehl |
SANTALACEAE |
| Commelina erecta L. var angustifolia (Michaux) Fernald |
COMMELINACEAE |
| Convolvulus arvensis L. |
CONVOLVULACEAE |
| Conyza canadensis (L.) Cronquist |
ASTERACEAE |
| Coryphantha vivipara (Nuttall) Britton & Rose var vivipara |
CACTACEAE |
| Critesion jubatum (L.) Nevski |
POACEAE |
| Croton texensis (Klotsch) Müller-Argoviensis in De Candolle |
EUPHORBIACEAE |
| Cryptantha minima Rydberg |
BORAGINACEAE |
| Cucurbita foetidissima Humboldt, Bonpland, & Kunth |
CUCURBITACEAE |
| Cyclachaena xanthifolia (Nuttall) Fresenius |
ASTERACEAE |
| Cycloloma atriplicifolium (Sprengel) Coulter |
CHENOPODIACEAE |
| Cymopterus montanus Torrey & Gray |
APIACEAE |
| Cyperus erythrorhizus Mühlenberg |
CYPERACEAE |
| Cyperus odoratus L. |
CYPERACEAE |
| Dactylis glomerata L. |
POACEAE |
| Dalea aurea Nuttall ex Pursh |
FABACEAE |
| Dalea candida Willdenow var oligophylla (Torrey) Shinners |
FABACEAE |
| Dalea enneandra Nuttall |
FABACEAE |
| Dalea multiflora (Nuttall) Shinners |
FABACEAE |
| Dalea purpurea Ventenat |
FABACEAE |
| Dalea villosa Sprengel |
FABACEAE |
| Descurainia pinnata (Walter) Britton subsp. halictorum (Cockerell) Detling |
BRASSICACEAE |
| Descurainia sophia (L.) Webb ex Prantl |
BRASSICACEAE |
| Digitaria sanguinalis (L.) Scopoli |
POACEAE |
| Diplachne fascicularis (Lamarck) P. Beauvois |
POACEAE |
| Distichlis stricta (Torrey) Rydberg |
POACEAE |
| Dyssodia papposa (Ventenat) A. S. Hitchcock |
ASTERACEAE |
| Echinacea angustifolia De Candolle |
ASTERACEAE |
| 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 |
| Eragrostis cilianensis (Allioni) F. T. Hubbard |
POACEAE |
| Eragrostis pectinacea (Michaux) Nees |
POACEAE |
| Eragrostis pilosa (L.) P. Beauvois |
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 hookeri |
ALSINACEAE |
| Erigeron bellidiastrum Nuttall |
ASTERACEAE |
| Erigeron canus A. Gray |
ASTERACEAE |
| Erigeron pumilus Nuttall |
ASTERACEAE |
| Eriogonum annuum Nuttall |
POLYGONACEAE |
| Eriogonum effusum Nuttall |
POLYGONACEAE |
| Erysimum asperum (Nuttall) De Candolle |
BRASSICACEAE |
| Euploca convolvulacea Nuttall |
BORAGINACEAE |
| Evolvulus nuttallianus Schultes |
CONVOLVULACEAE |
| Fraxinus pennsylvanica H. Marshall var lanceolata (Borkhausen) Sargent |
OLEACEAE |
| Froelichia floridana (Nuttall) Moquin var campestris (Small) Fernald |
AMARANTHACEAE |
| Gaura coccinea Nuttall ex Pursh |
ONAGRACEAE |
| Gaura mollis James |
ONAGRACEAE |
| Gleditsia triacanthos L. |
FABACEAE |
| Glycyrrhiza lepidota Pursh |
FABACEAE |
| Grammica campestris (Yuncker) Hadaç & Chrtek |
CUSCUTACEAE |
| Grammica umbellata (Humboldt, Bonpland, & Kunth) Hadaç & Chrtek |
CUSCUTACEAE |
| Grindelia squarrosa (Pursh) Dunal |
ASTERACEAE |
| Gutierrezia sarothrae (Pursh) Britton & Rusby |
ASTERACEAE |
| Hecatonia scelerata (L.) Fourreau |
RANUNCULACEAE |
| Hedeoma hispidum Pursh |
LAMIACEAE |
| Helianthus annuus L. |
ASTERACEAE |
| Helianthus petiolaris Nuttall |
ASTERACEAE |
| Hesperostipa comata (Trinius & Ruprecht) Barkworth |
POACEAE |
| Heterotheca latifolia Buckley |
ASTERACEAE |
| Heterotheca villosa (Pursh) Shinners |
ASTERACEAE |
| Hippochaete laevigata (A. Braun) Farwell |
EQUISETACEAE |
| Hymenopappus flavescens A. Gray |
ASTERACEAE |
| Hymenopappus tenuifolius Pursh |
ASTERACEAE |
| Ipomoea leptophylla Torrey |
CONVOLVULACEAE |
| Ipomopsis longiflora (Torrey) V. Grant |
POLEMONIACEAE |
| Ipomopsis spicata (Nuttall) V. Grant |
POLEMONIACEAE |
| Iva axillaris Pursh |
ASTERACEAE |
| Juncus bufonius L. |
JUNCACEAE |
| Juncus torreyi Coville |
JUNCACEAE |
| Koeleria macrantha (Ledebour) Schultes |
POACEAE |
| Lactuca serriola L. |
ASTERACEAE |
| Lactuca tatarica (L.) C. A. Meyer ssp pulchella (Pursh) Stebbins |
ASTERACEAE |
| Lamium amplexicaule L. |
LAMIACEAE |
| Lappula redowskii (Hornemann) Greene |
BORAGINACEAE |
| Lathyrus polymorphus Nuttall ssp incanus (Small & Rydberg) C. L. Hitchcock |
FABACEAE |
| Leiostemon ambiguus (Torrey) Greene |
SCROPHULARIACEAE |
| Lemna minor L. |
LEMNACEAE |
| Lepidium densiflorum Schrader |
BRASSICACEAE |
| Lesquerella ludoviciana (Nuttall) S. Watson |
BRASSICACEAE |
| Leucocrinum montanum Nuttall ex A. Gray |
LILIACEAE |
| Liatris punctata Hooker |
ASTERACEAE |
| Lithospermum incisum Lehmann |
BORAGINACEAE |
| Lycopus americanus Mühlenberg ex W. Barton |
LAMIACEAE |
| Lygodesmia juncea (Pursh) D. Don |
ASTERACEAE |
| Machaeranthera canescens (Pursh) A. Gray |
ASTERACEAE |
| Machaeranthera pinnatifida (Hooker) Shinners |
ASTERACEAE |
| Machaeranthera pinnatifida (Hooker) Shinners var glaberrima (Rydberg) Turner & Hartman |
ASTERACEAE |
| Malva neglecta Wallroth |
MALVACEAE |
| Mariscus schweinitzii (Torrey) Koyama |
CYPERACEAE |
| Medicago lupulina L. |
FABACEAE |
| Medicago sativa L. |
FABACEAE |
| Melilotus albus Medicus |
FABACEAE |
| Melilotus officinale (L.) Pallas |
FABACEAE |
| Mentha arvensis L. |
LAMIACEAE |
| Mesynium rigidum (Pursh) Löve & Löve |
LINACEAE |
| Monroa squarrosa (Nuttall) Torrey |
POACEAE |
| Muhlenbergia asperifolia (Nees & Meyen ex Trinius) Parodi |
POACEAE |
| Muhlenbergia pungens Thurber ex A. Gray |
POACEAE |
| Muhlenbergia racemosa (Michaux) Britton, Sterns, & Poggenberg |
POACEAE |
| Muhlenbergia torreyi (Kunth) A. S. Hitchcock ex Bush |
POACEAE |
| Musineon divaricatum (Pursh) Nuttal ex Torrey & Gray |
APIACEAE |
| Nassella viridula (Trinius) Barkworth |
POACEAE |
| Nasturtium officinale R. Brown |
BRASSICACEAE |
| Nepeta cataria L. |
LAMIACEAE |
| Nothocalais cuspidata (Pursh) Greene |
ASTERACEAE |
| Nuttallia decapetala (Pursh ex Sims) Greene |
LOASACEAE |
| Nuttallia nuda (Pursh) Greene |
LOASACEAE |
| Oenothera albicaulis Pursh |
ONAGRACEAE |
| Oenothera canescens Torrey & Frémont |
ONAGRACEAE |
| Oenothera coronopifolia Torrey & Gray |
ONAGRACEAE |
| Oenothera latifolia (Rydberg) Munz |
ONAGRACEAE |
| Oenothera villosa Thunberg ssp strigosa (Rydberg) Dietrich & Raven |
ONAGRACEAE |
| Oligoneuron rigidum (L.) Small |
ASTERACEAE |
| Oligosporus caudatus (Michaux) Poljakov |
ASTERACEAE |
| Oligosporus dracunculus (L.) Poljakov |
ASTERACEAE |
| Oligosporus filifolius (Torrey) Poljakov |
ASTERACEAE |
| Opuntia macrorhiza Engelmann |
CACTACEAE |
| Opuntia polyacantha Haworth var. polyacantha |
CACTACEAE |
| Oreocarya cana A. Nelson |
BORAGINACEAE |
| Oreocarya suffruticosa (Torrey) Greene |
BORAGINACEAE |
| Oreocarya thyrsiflora Greene |
BORAGINACEAE |
| Orobanche ludoviciana Nuttall |
OROBANCHACEAE |
| Orophaca hyalina (Jones) Isely |
FABACEAE |
| Orophaca sericea (Nuttall) Britton |
FABACEAE |
| Orophaca triphylla Britton |
FABACEAE |
| Oxalis dillenii Jacquin |
OXALIDACEAE |
| Oxybaphus decumbens (Nuttall) Sweet |
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 sericea Nuttall |
FABACEAE |
| Oönopsis engelmannii (A. Gray) Greene |
ASTERACEAE |
| Packera tridenticulata (Rydberg) Weber & Löve |
ASTERACEAE |
| Padus virginiana (L.) P. Miller ssp melanocarpa (A. Nelson) W. A. Weber |
ROSACEAE |
| Palafoxia sphacelata (Nuttall ex Torrey) Cory |
ASTERACEAE |
| Panicum capillare L. |
POACEAE |
| Panicum virgatum L. |
POACEAE |
| Paronychia sessiliflora Nuttall |
ALSINACEAE |
| Pascopyrum smithii (Rydberg) Löve |
POACEAE |
| Paspalum setaceum Michaux var stramineum (Nash) D. Banks |
POACEAE |
| Pediomelum esculentum (Pursh) Rydberg |
FABACEAE |
| Penstemon albidus Nuttall |
SCROPHULARIACEAE |
| Penstemon angustifolius Nuttall ex Pursh |
SCROPHULARIACEAE |
| Penstemon angustifolius Nuttall ex Pursh ssp caudatus (Heller) Keck |
SCROPHULARIACEAE |
| Penstemon buckleyi Pennell |
SCROPHULARIACEAE |
| Persicaria bicornis (Rafinesque) Nieuwland |
POLYGONACEAE |
| Persicaria coccinea (Mühlenberg ex Willdenow) Greene |
POLYGONACEAE |
| Persicaria lapathifolia (L.) S. Gray |
POLYGONACEAE |
| Phlox andicola (Nuttall ex Torrey & Gray) E. Nelson |
POLEMONIACEAE |
| 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 |
| Picradeniopsis oppositifolia (Nuttall) Rydberg |
ASTERACEAE |
| Plantago lanceolata L. |
PLANTAGINACEAE |
| Plantago patagonica Jacquin |
PLANTAGINACEAE |
| Poa annua L. |
POACEAE |
| Poa pratensis L. |
POACEAE |
| Podospermum laciniatum (L.) De Candolle |
ASTERACEAE |
| Poinsettia dentata (Michaux) Klotsch & Garcke |
EUPHORBIACEAE |
| Polanisia dodecandra (L.) De Candolle |
CAPPARACEAE |
| Polanisia jamesii (Torrey & Gray) Iltis |
CAPPARACEAE |
| Polygonum arenastrum Boreau |
POLYGONACEAE |
| Polygonum erectum L. ssp achoreum (S. F. Blake) Löve & Löve |
POLYGONACEAE |
| Polygonum ramosissimum Michaux |
POLYGONACEAE |
| Polypogon monspeliensis (L.) Desfontaines |
POACEAE |
| Populus deltoides H. Marshall ssp monilifera (Aiton) Eckenwalder |
SALICACEAE |
| Potentilla rivalis Nuttall ex Torrey & Gray |
ROSACEAE |
| Proboscidea louisianica (P. Miller) Thellung |
MARTYNIACEAE |
| Psoralidium argophyllum (Pursh) Rydberg |
FABACEAE |
| Psoralidium lanceolatum (Pursh) Rydberg |
FABACEAE |
| Psoralidium tenuiflorum (Pursh) Rydberg |
FABACEAE |
| Ratibida columnifera (Nuttall) Wooton & Standley |
ASTERACEAE |
| Ratibida tagetes (James) Barnhart |
ASTERACEAE |
| Redfieldia flexuosa (Thurber ex A. Gray) Vasey |
POACEAE |
| Rhus aromatica Aiton ssp trilobata (Nuttall ex Torrey & Gray) W. A. Weber |
ANACARDIACEAE |
| Ribes aureum Pursh |
GROSSULARIACEAE |
| Ribes odoratum Wendland |
GROSSULARIACEAE |
| Rorippa sinuata (Nuttall in Torrey & Gray) A. S. Hitchcock |
BRASSICACEAE |
| Rosa arkansana T. C. Porter |
ROSACEAE |
| Rumex altissimus Wood |
POLYGONACEAE |
| Rumex crispus L. |
POLYGONACEAE |
| Rumex maritimus L. ssp fueginus (Philippi) Hultén |
POLYGONACEAE |
| Rumex stenophyllus Ledebour |
POLYGONACEAE |
| Rumex venosus Pursh |
POLYGONACEAE |
| Sabina virginiana (L.) Antoine |
CUPRESSACEAE |
| Salix amygdaloides Andersson |
SALICACEAE |
| Salix exigua Nuttall |
SALICACEAE |
| Salsola australis R. Brown |
CHENOPODIACEAE |
| Salvia reflexa Hornemann |
LAMIACEAE |
| Schedonnardus paniculatus (Nuttall) Trelease |
POACEAE |
| Schizachyrium scoparium (Michaux) Nash |
POACEAE |
| Schoenoplectus lacustris (L.) Palla ssp creber (Fernald) Löve & Löve |
CYPERACEAE |
| Senecio riddellii Torrey & Gray |
ASTERACEAE |
| Setaria glauca (L.) P. Beauvois |
POACEAE |
| Setaria viridis (L.) P. Beauvois |
POACEAE |
| Shinnersoseris rostrata (A. Gray) Tomb |
ASTERACEAE |
| Solanum elaeagnifolium Cavanilles |
SOLANACEAE |
| Solanum rostratum Dunal |
SOLANACEAE |
| Solanum triflorum Nuttall |
SOLANACEAE |
| Solidago mollis Bartling |
ASTERACEAE |
| Sorghastrum avenaceum (Michaux) Nash |
POACEAE |
| Sorghum vulgare Persoon |
POACEAE |
| Spartina pectinata Link |
POACEAE |
| Sphaeralcea coccinea (Pursh) Rydberg |
MALVACEAE |
| Sphaeralcea coccinea (Pursh) Rydberg ssp coccinea |
MALVACEAE |
| Sporobolus airoides (Torrey) Torrey |
POACEAE |
| Sporobolus asper (Michaux) Kunth |
POACEAE |
| Sporobolus cryptandrus (Torrey) A. Gray |
POACEAE |
| Stephanomeria pauciflora (Torrey) A. Nelson |
ASTERACEAE |
| Suckleya suckleyana (Torrey) Rydberg |
CHENOPODIACEAE |
| Talinum parviflorum Nuttall ex Torrey & Gray |
PORTULACACEAE |
| Tamarix ramosissima Ledebour |
TAMARICACEAE |
| Taraxacum officinale G. H. Weber ex Wiggers |
ASTERACEAE |
| Tetraneuris acaulis (Pursh) Greene |
ASTERACEAE |
| Tetraneuris acaulis (Pursh) Greene var acaulis |
ASTERACEAE |
| Thelesperma megapotamicum (Sprengel) Kuntze |
ASTERACEAE |
| Thinopyrum ponticum (Podpera) Barkworth & Dewey |
POACEAE |
| Thlaspi arvense L. |
BRASSICACEAE |
| Tradescantia occidentalis (Britton) Smyth |
COMMELINACEAE |
| Tragopogon dubius Scopoli |
ASTERACEAE |
| Tribulus terrestris L. |
ZYGOPHYLLACEAE |
| Trifolium fragiferum L. |
FABACEAE |
| Trifolium pratense L. |
FABACEAE |
| Triplasis purpurea (Walter) Chapman |
POACEAE |
| Ulmus pumila L. |
ULMACEAE |
| Verbascum thapsus L. |
SCROPHULARIACEAE |
| Verbena bracteata Lagasca & Rodriguez |
VERBENACEAE |
| Verbena hastata L. |
VERBENACEAE |
| Verbena stricta Ventenat |
VERBENACEAE |
| Veronica peregrina L. ssp xalapensis (Humboldt,_Bonpland, & Kunth) Pennell |
SCROPHULARIACEAE |
| Vexibia nuttalliana (B. Turner) W. A. Weber |
FABACEAE |
| Vicia americana Mühlenberg |
FABACEAE |
| Vicia americana Mühlenberg var minor Hooker |
FABACEAE |
| Viola nuttallii Pursh |
VIOLACEAE |
| Virgulus ericoides (L.) Reveal & Keener |
ASTERACEAE |
| Virgulus falcatus (Lindley) Reveal & Keener |
ASTERACEAE |
| Vulpia octoflora (Walter) Rydberg |
POACEAE |
| Xanthium strumarium L. |
ASTERACEAE |
| Yucca glauca Nuttall in Fraser |
AGAVACEAE |
| Zannichellia palustris L. |
ZANNICHELLIACEAE |
| Zygophyllidium hexagonum (Nuttall) Small |
EUPHORBIACEAE |
