| Acer negundo | L. Box Elder or Fresno de Guajuco |
| Aconitum columbianum Nutt. | Monkshood |
| Adiantum capillus-veneris L. | Maidenhair fern |
| Agrimonia gryposepala Wallr. | Agrimony |
Agrostis exarata Trin. | Spike bentgrass |
| Agrostis gigantea Roth | Redtop, zacate de piedras castillitos |
| Agrostis idahoensis Nash | Idaho bentgrass |
| Agrostis stolonifera L. | Redtop, carpet or creeping bentgrass, zacate |
| de piedras quilla | |
| Alhagi maurorum Medik. | Camelthorn |
| Allenrolfea occidentalis (S. Wats.) Kuntze | Pickleweed or Iodine Bush |
| Alnus incana ssp. tenuifolia (Nutt.) Breitung | Thinleaf alder or Aliso |
| Alnus oblongifolia Torr. | New Mexico or Arizona alder |
| Alopercurus carolinianus Walt. | Carolina foxtail |
| Alopercurus myosuroides Huds. | foxtail |
| Ambrosia trifida L. | Giant ragweed |
| Amorpha fruticosa L. | Indigo bush or False indigo |
| Anagallis minima (L.) Krause | |
| Andropogon glomeratus (Walt.) B.S.P. | Bushy bluestem |
| Anemone canadensis L. | Canada anemome |
| Angelica ampla A. Nels. | |
| Angelica pinnata S. Wats. | Small-leaved angelica |
| Apium graveolens L. | Celery |
| Aquilegia chrysantha Gray | Golden columbine |
| Aquilegia coerulea James | Colorado columbine |
| Arnica chamissonis Less. | Chamisso arnica |
| Artemisia biennis Willd. | Biennial worm wood |
| Artemisia cana Pursh | Silver sage |
| Arundo donax L. | Giant reed |
| Asclepias speciosa Torr. | Showy milkweed |
| Aster ascendens Lindl. | Pacific aster |
| Aster foliaceus Lindl. ex DC. | Leafy bract aster |
| Aster novae-angliae L. | New England aster |
| Aster praealtus Poir. | |
| Astragalus agrestis Dougl. ex G. Don | Field milkvetch |
| Atriplex lentiformis (Torr.)S. Wats. | Big saltbrush |
| Baccharis emoryi Gray | Emory baccharis |
| Baccharis salicifolia (Ruiz & Pav—n) Pers. | Seepwillow baccharis |
| Bassia hyssopifolia (Pallas) Volk. | Five-hook bassia |
| Besseya arizonica Pennell | |
| Besseya plantaginea (James) Rydb. | |
| Betula occidentalis Hook. | Water birch |
| Bidens frondosa L. | Devils beggars ticks |
| Bidens tenuisecta Gray | |
| Botrychium lanceolatum (Gmel.) ngstr | Lance leaf grapefern |
| Botrychium lunaria (L.) Sw. | Moonwort |
| Bulbostylis funckii (Steud.) C.B. Clarke | |
| Bulbostylis juncoides (Vahl) KŸkenth. | |
| Calamagrostis scribneri Beal | Scribner's reedgrass |
| Calamagrostis stricta ssp. inexpansa (Gray) C.W. Greene | Slimstem or northern reedgrass |
| Caltha leptosepala DC. | Marsh marigold |
| Carex athrostachya Olney | Slender-beaked sedge |
| Carex brevior (Dewey) Mackenzie ex Lunell | Brevior sedge, short-beaked sedge |
| Carex capillaris L. | Hair sedge |
| Carex heteroneura W. Boott | Blackened sedge |
| Carex microptera Mackenzie | Small-wing sedge |
| Carex norvegica Retz. | Norway sedge, Scandinavian sedge |
| Carex norvegica ssp. inferalpina (Wahlenb.) HultŽn | |
| Carex nova Bailey | Black sedge, new sedge |
| Castilleja lineata Greene | |
| Centaurium calycosum (Buckl.) Fern. | Buckley's centuary |
| Centaurium nudicaule (Engelm.) B.L. Robins. | |
| Cerastium arvense L. | Field chickweed |
| Cercis canadensis var. mexicana (Rose) M. Hopkins | American redbud |
| Chenopodium rubrum L. | Red goosefoot |
| Chloracantha spinosa (Benth.) Nesom | |
| Cinna latifolia (Trev. ex Goepp.) Griseb. | Drooping woodreed |
| Cirsium pallidum Woot. & Standl. | |
| Cirsium parryi (Gray) Petrak | |
| Claytonia perfoliata Donn ex Willd. | Miners lettuce |
| Cleome multicaulis DC. | |
| Cornus sericea ssp. sericea | Red osier dogwood, kinnikinik, American sogwood |
| Cyperus esculentus L. | Yellow nutsedge, Chufa flat sedge |
| Cyperus odoratus L. | |
| Cyperus parishii Britt. | |
| Cyperus strigosus L. | Strigose nutsedge |
| Cypripedium parviflorum Salisb. | |
| Cystopteris bulbifera (L.) Bernh. | Bulblet bladderfern |
| Deschampsia cespitosa (L.) Beauv. | Tufted hairgrass |
| Deschampsia danthonioides (Trin.) Munro | Annual hairgrass |
| Distichlis spicata (L.) Greene | Inland saltgrass, desert saltgrass |
| Dodecatheon dentatum ssp. ellisiae (Standl.) H.J. Thompson | Hooker's shooting-star |
| Dodecatheon pulchellum (Raf.) Merr. | Pretty shooting-star |
| Echinochloa colona (L.) Link | Junglerice |
| Echinochloa crus-galli (L.) Beauv. | Barnyard grass |
| Echinochloa muricata (Beauv.) Fern. | Cockspur |
| Elaeagnus angustifolia L. | Russian olive, Oleaster |
| Elatine brachysperma Gray | |
| Eleocharis atropurpurea (Retz.) J.& K. Presl | |
| Eleocharis bella (Piper) Svens. | Pretty spikerush |
| Eleocharis compressa Sullivant | |
| Eleocharis geniculata(L.) Roemer & J.A. Schultes | |
| Eleocharis montevidensis Kunth | |
| Eleocharis parishii Britt. | Parishes' spikerush |
| Elymus virginicus L. | Virginia wildrye |
| Epilobium ciliatum Raf. | Northern willowherb |
| Epilobium hornemanniiReichenb. | Hornemann's willowherb |
| Epilobium saximontanum Hausskn. | Rocky Mountain willowherb |
| Equisetum arvense L. | Field horsetail, Meadow horsetail |
| Equisetum X ferrissii Clute (pro sp.) | |
| Equisetum hyemale L. | Scouring rush |
| Equisetum laevigatum A.Braun | Smooth scouring rush |
| Erigeron coulteri Porter | Coulter's daisy |
| Erigeron elatior (Gray) Greene | Tall daisy |
| Eriochloa acuminata var. acuminata (J. Presl) Kunth | Cupgrass |
| Eriochloa contracta A.S. Hitchc. | Prairie cup grass |
| Euthamia occidentalis Nutt. | Western goldenrod |
| Festuca rubra L. Red fescue Fimbristylis vahlii (Lam.) Link | |
| Flaveria chlorifolia Gray | |
| Galium trifidum L. | Small bedstraw |
| Galium trifidum ssp. subbiflorum (Wieg.) Piper | |
| Gentiana algida Pallas | Arctic gentian |
| Gentiana parryi Engelm. | Parry's gentian |
| Gentianella amarella (L.) Boerner | Northern gentian |
| Geranium caespitosum var. eremophilum (Woot. & Standl.) W.C. Martin & C.R. Hutchins | James' geranium |
| Geum macrophyllum Willd. | Large-leaved avens |
| Gnaphalium palustre Nutt. | Lowland cudweed |
| Helenium autumnale L. | Common sneezeweed |
| Helianthus nuttallii Torr. & Gray Nutall | sunflower |
| Heuchera rubescens var.versicolor (Greene) M.G. Stewart | Hairy alumroot |
| Hierochloe odorata (L.) Beauv. | Sweetgrass |
| Holcus lanatus L. | Common velvetgrass |
| Hordeum jubatum L. | Foxtail barley |
| Hydrophyllum fendleri (Gray) Heller | Fendler's waterleaf |
| Iliamna grandiflora (Rydb.) Wiggins Iris missouriensis Nutt. | Missouri iris |
| Juglans major (Torr.) Heller | Arizona walnut |
| Juncus confusus Coville | Perplexing rush |
| Juncus drummondii E. Mey. | Drummond's rush |
| Juncus longistylis Torr.Juncus marginatus Rostk. | Longstyle rush |
| Juncus mexicanus Willd. ex J.A. & J.H. Schultes | |
| Juncus nevadensis S. Wats. | Nevada rush |
| Juncus saximontanus A. Nels. | |
| Juncus tenuis Willd. | Poverty rush |
| Juncus torreyi Coville | Torrey's rush |
| Laennecia coulteri (Gray) Nesom | |
| Lipocarpha drummondii (Nees) G. Tucker | |
| Lobelia anatina F. Wimmer | |
| Luzula multiflora (Ehrh.) Lej. | Hairy woodrush |
| Lysimachia ciliata L. | Fringed loosestrife |
| Machaeranthera bigelovii var. bigelovii (Gray) Greene | Bigelow's aster |
| Machaeranthera boltoniae (Greene) B.L. Turner & Horne | |
| Machaeranthera boltoniae (Greene) B.L. Turner & Horne | |
| Malvella leprosa (Ortega) Krapov. | Alkali mallow, dollar weed |
| Mecardonia procumbens (P. Mill.) Small | |
| Mentha arvensis L. | Field mint |
| Mentha spicata L. | Spearmint |
| Mertensia ciliata (James ex Torr.) G. Don | Mountain bluebell |
| Mertensia franciscana Heller | Flagstaff bluebell |
| Mimulus floribundus Lindl. | Seep monkey-flower |
| Mimulus rubellus Gray | Reddish monkey-flower |
| Monardella odoratissima Benth. | Stinking horse mint |
| Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi | Scratchgrass |
| Muhlenbergia mexicana (L.) Trin. | Mexican Muhly |
| Myosurus cupulatus S. Wats. | Horseshoe mousetail |
| Nepeta cataria L. Catnip Oenothera elata Kunth | Hooker's evening-primrose |
| Oenothera flava (A. Nels.) Garrett | Yellow evening-primrose |
| Oenothera rosea L'HŽr. ex Ait. | |
| Oenothera villosa Thunb. | |
| Ophioglossum engelmannii Prantl | |
| Osmorhiza longistylis (Torr.) DC. | |
| Oxypolis fendleri (Gray) Heller | Fendler's cowbane |
| Parietaria pensylvanica Muhl. ex Willd. | Hammerwort |
| Perideridia parishii (Coult.& Rose) A. Nels. & J.F. Macbr. | |
| Phalaris angusta Nees ex Trin. | Canarygrass |
| Phalaris californica Hook. & Arn. | |
| Phleum alpinum L. | Alpine timothy |
| Phragmites australis (Cav.) Trin. ex Steud. | Common reed |
| Phyla cuneifolia (Torr.) Greene | Wedge-leaf frog-fruit |
| Phyla nodiflora (L.) Greene | Matted frog-fruit |
| Physostegia virginiana (L.) Benth. | Obedient plant |
| Physostegia virginiana ssp. praemorsa (Shinners) Cantino | |
| Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston Scouler's | popcorn flower |
| Plantago major L. | Broadleaf plantain |
| Platanthera dilatata (Pursh) Lindl. ex Beck | Chamisso's bog orchid |
| Platanthera hyperborea (L.) Lindl. | Northern bog orchid |
| Platanus wrightii S. Wats. | Arizona sycamore, Arizona plane-tree |
| Pluchea odorata var. odorata auct. non (L.) Cass. | xxx |
| Poa arctica R. Br. | Arctic bluegrass |
| Polygonum aviculare L. | Knotweed, chivalry-grass, ditchwater grass |
| Polygonum persicaria L. | Ladys thumb |
| Polypogon monspeliensis (L.) Desf. | Rabbit foot grass |
| Polypogon viridis (Gouan) Breistr. | xxx |
| Populus X acuminata Rydb. (pro sp.) | Lanceleaf cottonwood |
| Populus angustifolia James | Narrow leaf cottonwood |
| Populus deltoides Bartr. ex Marsh. | Alamo cottonwood |
| Populus fremontii S. Wats. | Fremont cottonwood |
| Potentilla diversifolia Lehm. | Wedge-leaf cinquefoil |
| Potentilla plattensis Nutt. | Platt cinquefoil |
| Potentilla thurberi Gray | |
| Prosopis pubescens Benth. | Screwbean, Mescrew, tornillo |
| Prunella vulgaris L. | Heal-all |
| Puccinellia distans (Jacq.) Parl. | Weeping alkali grass |
| Ranunculus abortivus L. | |
| Ranunculus acris L. | Tall buttercup |
| Ranunculus cardiophyllus Hook. | Showy buttercup |
| Ranunculus eschscholtzii Schlecht. | Eschoscholz's buttercup |
| Ranunculus flammula L. | Creeping spearwort |
| Ranunculus inamoenus Greene | Drab buttercup |
| Ranunculus macauleyi Gray | |
| Ranunculus pensylvanicus L. f. | |
| Ranunculus uncinatus D. Don ex G. Don | |
| Ribes inerme Rydb. | Whitestem gooseberry, wine gooseberry |
| Rorippa sinuata (Nutt.) A.S. Hitchc. | Beaked yellowcress |
| Rudbeckia laciniata L. | Cutleaf coneflower |
| Rumex acetosella L. | Sheep sorel |
| Rumex crispus L. | Curled dock |
| Rumex densiflorus Osterhout | |
| Rumex maritimus L. | Golden dock |
| Rumex obtusifolius L. | Bitter dock |
| Rumex salicifolius var. mexicanus (Meisn.) C.L. Hitchc. | Beach dock |
| Rumex venosus Pursh | Large valve dock |
| Rumex verticillatus L. | |
| Rumex violascens Rech. f. | |
| Sagina saginoides (L.) Karst. | Sagina |
| Salix amygdaloides Anderss. | Peach leaf willow |
| Salix bebbiana Sarg. | Bebb's willow |
| Salix bonplandiana Kunth | Bonpland willow |
| Salix drummondiana Barratt ex Hook. | Drummond's willow |
| Salix glauca L. | Glaucous willow, greyleaf willow |
| Salix irrorata Anderss. | Bluestem willow |
| Salix lasiolepis Benth. | Arroyo willow |
| Salix lucida Muhl. | Whiplash willow |
| Salix lucida ssp. lasiandra (Benth.) E. Murr. | |
| Salix monticola | Bebb Mountain willow |
| Sambucus racemosa ssp.pubens var. melanocarpa (Gray) McMinn | Rocky Mountain Elder |
| Sarcocornia utahensis (Tidestrom).J. Scott | |
| Saxifraga cernua L. | Nodding saxifrage |
| Saxifraga odontoloma Piper | Brook saxifrage |
| Saxifraga rivularis L. | |
| Scrophularia lanceolata Pursh | Figwort |
| Selenia dissecta Torr. & Gray | |
| Senecio amplectens Gray | |
| Senecio pseudaureus Rydb. | |
| Senecio quaerens Greene | |
| Sesbania exaltata (Raf.) Rydb. ex A.W. Hill | |
| Sesuvium verrucosum Raf. | Seapurslane |
| Sisyrinchium montanum Greene | |
| Solidago gigantea Ait. | |
| Sonchus asper (L.) Hill | Spiny sow-thistle |
| Spartina gracilis Trin. | Alkali cordgrass |
| Spartina pectinata Link | Prairie cordgrass, slough grass |
| Spermolepis divaricata (Walt.) Raf. ex Ser. | |
| Stellaria calycantha (Ledeb.) Bong. | Calyx starwort |
| Stellaria longipes Goldie | Long-stalk starwort |
| Stellaria longipes ssp. longipes Goldie | |
| Stellaria umbellata Turcz. ex Kar. & Kir. | Umbellate starwort |
| Suaeda calceoliformis (Hook.) Moq. | Broom seepweed |
| Suckleya suckleyana (Torr.) Rydb. | |
| Tamarix chinensis Ledeb. | Tamarix, salt-cedar, tamarisk |
| Teucrium canadense L.Ê | American germander |
| Teucrium cubense Jacq. | |
| Thalictrum alpinum L. | Arctic meadowrue |
| Thalictrum dasycarpum Fisch. & AvŽ-Lall. | |
| Toxicodendron rydbergii (Small ex Rydb.) Greene | Poison ivy |
| Tradescantia wrightii Rose & Bush | |
| Trautvetteria caroliniensis (Walt.) Vail | False bug bane |
| Trifolium longipes Nutt. | Rydberg's clover |
| Trifolium nanum Torr. | Dwarf clover, tundra clover |
| Trifolium wormskjoldii Lehm. | Wormskjold's clover, cow clover |
| Trisetum spicatum (L.) Richter | Spike trisetum |
| Trisetum wolfii Vasey | Wolf's trisetum |
| Urtica dioica L. | Stinging nettle |
| Vallisneria americana Michx. | |
| Veratrum californicum Dur. | False hellebore, skunk-cabbage |
| Verbena hastata L. | Blue vervain |
| Vernonia missurica Raf. | |
| Vicia sativa L. | |
| Vulpia myuros (L.) K.C. Gmel. | Myur fescue |
