| | |
| | Abronia fragrans Nutt. ex Hook. |
| | Actaea pachypoda Elliott |
| | Actaea rubra (Aiton) Willd. |
| | Agoseris aurantiaca (Hook.) Greene trib. Cichorieae |
| | Agoseris glauca (Pursh) Raf. trib. Cichorieae |
| | Agoseris parviflora (Nutt.) D.Dietr. trib. Cichorieae |
| | Amorpha nana C.Fraser trib. Psoraleeae |
| | Anemonastrum canadense (L.) Mosyakin |
| | Anemone berlandieri Pritz. |
| | Anemone caroliniana Walter |
| | Anemone cylindrica A.Gray |
| | Anemonella thalictroides (L.) Spach |
| | Anemonoides quinquefolia (L.) Holub |
| | Antennaria dimorpha (Nutt.) Torr. & A.Gray trib. Gnaphalieae |
| | Antennaria flagellaris (A.Gray) A.Gray trib. Gnaphalieae |
| | Antennaria howellii Greene trib. Gnaphalieae |
| | Antennaria luzuloides Torr. & Gray trib. Gnaphalieae |
| | Antennaria microphylla Rydb. trib. Gnaphalieae |
| | Antennaria neglecta Greene trib. Gnaphalieae |
| | Antennaria parlinii Fernald trib. Gnaphalieae |
| | Antennaria parvifolia Nutt. trib. Gnaphalieae |
| | Antennaria rosea (D.C.Eaton) Greene trib. Gnaphalieae |
| | Antennaria solitaria Rydb. trib. Gnaphalieae |
| | Aquilegia brevistyla Hook. |
| | Aquilegia canadensis L. |
| | Arctostaphylos uva-ursi (L.) Spreng. |
| | Arnica cordifolia Hook. trib. Heliantheae |
| | Arnica fulgens Pursh trib. Heliantheae |
| | Arnica lonchophylla Greene trib. Heliantheae |
| | Artemisia cana Pursh trib. Anthemideae |
| | Artemisia carruthii Alph.Wood ex J.H.Carruth trib. Anthemideae |
| | Artemisia frigida Willd. trib. Anthemideae |
| | Artemisia stelleriana Besser trib. Anthemideae |
| | Asarum canadense L. |
| | Asclepias uncialis Greene trib. Asclepiadeae |
| | Astragalus aboriginorum Richardson trib. Galegeae |
| | Astragalus agrestis Douglas ex G.Don sect. Hypoglottidei |
| | Astragalus alpinus L. sect. Komaroviella |
| | Astragalus barrii Barneby trib. Galegeae |
| | Astragalus bodinii E.Sheld. trib. Galegeae |
| | Astragalus ceramicus E.Sheld. trib. Galegeae |
| | Astragalus crassicarpus Nutt. |
| | Astragalus distortus Torr. & A.Gray trib. Galegeae |
| | Astragalus drummondii Douglas trib. Galegeae |
| | Astragalus gilviflorus E.Sheld. trib. Galegeae |
| | Astragalus hyalinus M.E.Jones |
| | Astragalus kentrophyta A.Gray trib. Galegeae |
| | Astragalus lotiflorus Hook. trib. Galegeae |
| | Astragalus miser Douglas trib. Galegeae |
| | Astragalus missouriensis Nutt. trib. Galegeae |
| | Astragalus mollissimus Torr. |
| | Astragalus pectinatus (Hook.) Douglas ex G.Don trib. Galegeae |
| | Astragalus plattensis Nutt. trib. Galegeae |
| | Astragalus purshii Douglas ex G.Don trib. Galegeae |
| | Astragalus sericoleucus A.Gray trib. Galegeae |
| | Astragalus shortianus Nutt. |
| | Astragalus spatulatus E.Sheld. |
| | Astragalus tennesseensis A.Gray ex Chapm. |
| | Astragalus vexilliflexus E.Sheld. |
| | Atriplex confertifolia (Torr. & Frémont) S.Watson |
| | |
| | Balsamorhiza sagittata (Pursh) Nutt. trib. Heliantheae |
| | Berberis repens Lindl. |
| | Betula glandulosa Michx. |
| | Betula pumila L. |
| | Bistorta vivipara (L.) Delarbre |
| | |
| | Callirhoe involucrata (Torr. & A.Gray) A.Gray |
| | Callirhoe triangulata (Leavenw.) A.Gray |
| | Cardamine angustata O.E.Schulz |
| | Cardamine diphylla (Michx.) Alph.Wood |
| | Cardamine douglassii Britton |
| | Castilleja angustifolia (Nutt.) G.Don |
| | Castilleja citrina Pennell |
| | Castilleja haydenii (A.Gray) Cockerell |
| | Castilleja purpurea (Nutt.) G.Don |
| | Ceanothus fendleri A.Gray |
| | Ceanothus velutinus Douglas |
| | Chaetopappa ericoides (Torr.) G.L.Nesom trib. Astereae |
| | Chamaedaphne calyculata (L.) Moench |
| | Chamaerhodos erecta (L.) Bunge |
| | Chimaphila maculata (L.) Pursh |
| | Chimaphila umbellata (L.) W.P.C.Barton |
| | Chrysothamnus viscidiflorus (Hook.) Nutt. trib. Astereae |
| | Claytonia caroliniana Michx. |
| | Claytonia virginica L. |
| | Clematis columbiana (Nutt.) Torr. & A.Gray |
| | Clematis fremontii S.Watson |
| | Clematis hirsutissima Pursh |
| | Coptis trifolia (L.) Salisb. |
| | Coreopsis grandiflora Hogg ex Sweet trib. Heliantheae |
| | Coreopsis lanceolata L. trib. Heliantheae |
| | Cornus canadensis L. |
| | Crepis occidentalis Nutt. trib. Cichorieae |
| | Crocanthemum bicknellii (Fernald) Janchen |
| | Crocanthemum canadense (L.) Britton |
| | Crocanthemum georgianum (Chapm.) Barnhart |
| | Crocanthemum rosmarinifolium (Pursh) Janchen |
| | Cunila origanoides (L.) Britton |
| | Cymopterus glomeratus (Nutt.) DC. |
| | |
| | Dalea aurea Nutt. ex Pursh trib. Amorpheae |
| | Dalea candida Willd. trib. Amorpheae |
| | Dalea formosa Torr. trib. Amorpheae |
| | Dalea jamesii (Torr.) Torr. & A.Gray trib. Amorpheae |
| | Dalea nana Torr. ex A.Gray trib. Amorpheae |
| | Dalea purpurea Vent. trib. Amorpheae |
| | Dalea tenuifolia (A.Gray) Shinners trib. Amorpheae |
| | Dalea villosa (Nutt.) Spreng. trib. Amorpheae |
| | Dalibarda repens L. |
| | Dasiphora fruticosa (L.) Rydb. |
| | Delphinium bicolor Nutt. |
| | Delphinium nuttallianum Pritz. |
| | Delphinium tricorne Michx. |
| | Dicentra canadensis (Goldie) Walp. |
| | Dicentra cucullaria (L.) Bernh. |
| | Draba arabisans Michx. sect. Leucodraba |
| | Draba aurea Vahl ex Hornem. sect. Phyllodraba |
| | Draba cana Rydb. |
| | Draba glabella Pursh sect. Leucodraba |
| | Drymocallis arguta (Pursh) Rydb. |
| | Drymocallis fissa (Nutt.) Rydb. |
| | |
| | Empetrum nigrum L. |
| | Enemion biternatum Raf. |
| | Epigaea repens L. |
| | Epilobium latifolium L. |
| | Epilobium saximontanum Hausskn. |
| | Eremogone hookeri (Nutt.) W.A.Weber |
| | Erigenia bulbosa (Michx.) Nutt. |
| | Erigeron caespitosus Nutt. trib. Astereae |
| | Erigeron canus A.Gray trib. Astereae |
| | Erigeron compositus Pursh trib. Astereae |
| | Erigeron flagellaris A.Gray trib. Astereae |
| | Erigeron formosissimus Greene trib. Astereae |
| | Erigeron glabellus Nutt. trib. Astereae |
| | Erigeron ochroleucus Nutt. trib. Astereae |
| | Erigeron pumilus Nutt. trib. Astereae |
| | Erigeron radicatus Hook. trib. Astereae |
| | Erigeron vetensis Rydb. trib. Astereae |
| | Eriogonum brevicaule Nutt. sect. Eucycla |
| | Eriogonum effusum Nutt. sect. Eucycla |
| | Eriogonum flavum Nutt. ex Benth. sect. Oligogonum |
| | Eriogonum helichrysoides (Gand.) Prain sect. Eucycla |
| | Eriogonum jamesii Benth. sect. Oligogonum |
| | Eriogonum lachnogynum Torr. ex Benth. sect. Eucycla |
| | Eriogonum pauciflorum Pursh sect. Eucycla |
| | Erysimum capitatum (Douglas) Greene |
| | Erythranthe geyeri (Torr.) G.L.Nesom |
| | Erythranthe moschata (Douglas ex Lindl.) G.L.Nesom |
| | Euphorbia albomarginata Torr. & Gray |
| | Euphorbia brachycera Engelm. |
| | Euphorbia fendleri Torr. & A.Gray |
| | Euphorbia lata Engelm. |
| | Evolvulus nuttallianus Roem. & Schult. |
| | |
| | Fallugia paradoxa (D.Don ex Tilloch) Endl. ex Torr. |
| | |
| | Gaillardia aristata Pursh trib. Heliantheae |
| | Gaillardia pinnatifida Torr. trib. Heliantheae |
| | Gaultheria hispidula (L.) Muhl. ex Bigelow |
| | Gaultheria procumbens L. |
| | Gaylussacia baccata (Wangenh.) K.Koch |
| | Gentiana affinis Griseb. sect. Pneumonanthe |
| | Gentiana alba Muhl. ex J.McNab sect. Pneumonanthe |
| | Gentiana andrewsii Griseb. sect. Pneumonanthe |
| | Gentiana puberulenta J.S.Pringle sect. Pneumonanthe |
| | Gentiana rubricaulis Schwein. sect. Pneumonathe |
| | Gentiana saponaria L. sect. Pneumonanthe |
| | Geranium richardsonii Fisch. & Trautv. |
| | Geranium viscosissimum Fisch. & C.A.Mey. |
| | Geum triflorum Pursh |
| | Giliastrum acerosum (A.Gray) Rydb. |
| | Gratiola lutea Raf. |
| | Gutierrezia sarothrae (Pursh) Britton & Rusby trib. Astereae |
| | |
| | Hedeoma reverchonii (A.Gray) A.Gray |
| | Hedysarum boreale Nutt. trib. Hedysareae |
| | Hepatica acutiloba DC. |
| | Hepatica americana (DC.) Ker Gawl. |
| | Heterotheca villosa (Pursh) Shinners trib. Astereae |
| | Heuchera puberula Mack. & Bush |
| | Heuchera richardsonii R.Br. |
| | Hoffmannseggia glauca (Ortega) Eifert trib. Caesalpinieae |
| | Houstonia caerulea L. |
| | Houstonia longifolia Gaertn. |
| | Houstonia purpurea L. |
| | Hudsonia tomentosa Nutt. |
| | Hydrophyllum canadense L. |
| | Hylotelephium telephioides (Michx.) H.Ohba |
| | Hymenoxys richardsonii (Hook.) Cockerell trib. Helenieae |
| | Hypericum ellipticum Hook. sect. Myriandra |
| | Hypericum hypericoides ssp. multicaule (Michx.) N.Robson |
| | |
| | Ionactis linariifolia (L.) Greene trib. Astereae |
| | Ipomopsis congesta (Hook.) V.E.Grant |
| | Ipomopsis longiflora (Torr.) V.E.Grant |
| | Ipomopsis spicata (Nutt.) V.E.Grant |
| | Iris brevicaulis Raf. |
| | |
| | Jeffersonia diphylla (L.) Pers. |
| | |
| | Kalmia polifolia Wangenh. |
| | Krascheninnikovia ceratoides ssp. lanata (Pursh) Heklau |
| | |
| | Lathyrus polymorphus Nutt. trib. Vicieae |
| | Lespedeza procumbens Michx. trib. Desmodieae |
| | Liatris cylindracea Michx. trib. Eupatorieae |
| | Liatris punctata Hook. trib. Eupatorieae |
| | Linanthus caespitosus (Nutt.) J.M.Porter & L.A.Johnson |
| | Linum lewisii Pursh |
| | Lithophragma glabrum Nutt. |
| | Lithophragma parviflorum (Hook.) Nutt. |
| | Lithospermum canescens (Michx.) Lehm. |
| | Lithospermum incisum Lehm. |
| | Lobelia kalmii L. |
| | Lomatium cous (S.Watson) J.M.Coult. & Rose |
| | Lomatium foeniculaceum (Nutt.) J.M.Coult. & Rose |
| | Lomatium macrocarpum (Hook. & Arn.) L.M.Coult. & Rose |
| | Lomatium nuttallii (A.Gray) J.F.Macbr. |
| | Lomatium orientale J.M.Coult. & Rose |
| | Lupinus argenteus Pursh trib. Genisteae |
| | Lupinus sericeus Pursh trib. Genisteae |
| | Lygodesmia juncea (Pursh) D.Don ex Hook. trib. Cichorieae |
| | Lysimachia borealis (Raf.) U.Manns & Anderb. |
| | |
| | Melampodium leucanthum Torr. & A.Gray trib. Heliantheae |
| | Mentzelia decapetala (Pursh) Urb. |
| | Mentzelia nuda (Pursh) Torr. & A.Gray |
| | Mentzelia oligosperma Nutt. ex Sims |
| | Mertensia ciliata (E.James ex Torr.) G.Don |
| | Mertensia lanceolata (Pursh) DC. |
| | Mertensia oblongifolia (Nutt.) G.Don |
| | Mertensia paniculata (Aiton) G.Don |
| | Mertensia virginica (L.) Pers. ex Link |
| | Micranthes occidentalis (S.Watson) Small sect. Dermasea |
| | Micranthes palmeri (Bush) Bush sect. Dermasea |
| | Micranthes pensylvanica (L.) Haw. sect. Micranthes |
| | Micranthes texana (Buckley) Small sect. Dermasea |
| | Micranthes virginiensis (Michx.) Small sect. Dermasea |
| | Microseris cuspidata (Pursh) Sch.Bip. trib. Cichorieae |
| | Mitchella repens L. |
| | Mitella diphylla L. |
| | Mitella nuda L. |
| | Mitella pentandra Hook. |
| | Moehringia lateriflora (L.) Fenzl |
| | Monarda fistulosa L. |
| | Moneses uniflora (L.) A.Gray |
| | Montia chamissoi (Ledeb. ex Spreng.) Greene |
| | Musineon divaricatum (Pursh) Nutt. |
| | |
| | Oenothera berlandieri (Spach) D.Dietr. sect. Calylophus |
| | Oenothera brachycarpa A.Gray sect. Megapterium |
| | Oenothera cespitosa Nutt. sect. Pachylophus |
| | Oenothera coronopifolia Torr. & A.Gray sect. Kleinia |
| | Oenothera flava (A.Nelson) Garrett sect. Lavauxia |
| | Oenothera fruticosa L. sect. Kneiffia |
| | Oenothera gayleana M.L.Turner & M.J.Moore sect. Calylophus |
| | Oenothera hartwegii Benth. sect. Calylophus |
| | Oenothera lavandulifolia Torr. & A.Gray sect. Calylophus |
| | Oenothera macrocarpa Nutt. sect. Megapterium |
| | Oenothera perennis L. sect. Kneiffia |
| | Oenothera serrulata Nutt. sect. Calylophus |
| | Oenothera speciosa Nutt. sect. Hartmannia |
| | Oönopsis engelmannii (A.Gray) Greene trib. Astereae |
| | Oönopsis multicaulis (Nutt.) Greene trib. Astereae |
| | Oreocarya cana A.Nelson |
| | Oreocarya celosioides Eastw. |
| | Oreocarya suffruticosa (Torr.) Greene |
| | Orthilia secunda (L.) House |
| | Oxalis violacea L. |
| | Oxyria digyna (L.) Hill |
| | Oxytropis lambertii Pursh trib. Galegeae |
| | Oxytropis monticola A.Gray trib. Galegeae |
| | Oxytropis multiceps Nutt. trib. Galegeae |
| | Oxytropis sericea Nutt. trib. Galegeae |
| | Oxytropis splendens Douglas trib. Galegeae |
| | |
| | Packera cana (Hook.) W.A.Weber & Á.Löve trib. Senecioneae |
| | Packera thurberi (A.Gray) B.L.Turner trib. Senecioneae |
| | Parnassia glauca Raf. |
| | Parnassia grandifolia DC. |
| | Parnassia palustris L. |
| | Parnassia parviflora DC. |
| | Paronychia depressa (Torr. & A.Gray) Nutt. |
| | Paronychia jamesii Torr. & A.Gray |
| | Paronychia sessiliflora Nutt. |
| | Pediomelum esculentum (Pursh) Rydb. trib. Psoraleeae |
| | Pediomelum hypogaeum (Nutt.) Rydb. trib. Psoraleeae |
| | Penstemon albidus Nutt. sect. Cristati |
| | Penstemon ambiguus Torr. sect. Ambigui |
| | Penstemon angustifolius Nutt. ex Pursh sect. Coerulei |
| | Penstemon arkansanus Pennell sect. Penstemon |
| | Penstemon bradburyi Pursh sect. Coerulei |
| | Penstemon buckleyi Pennell sect. Coerulei |
| | Penstemon cobaea Nutt. sect. Cristati |
| | Penstemon eriantherus Nutt. ex Pursh sect. Cristati |
| | Penstemon fendleri Torr. & A.Gray sect. Coerulei |
| | Penstemon glaber Pursh sect. Glabri |
| | Penstemon gracilis Nutt. sect. Penstemon |
| | Penstemon haydenii S.Watson ex J.M.Coult. sect. Coerulei |
| | Penstemon hirsutus (L.) Willd. sect. Penstemon |
| | Penstemon jamesii Benth. sect. Cristati |
| | Penstemon laxiflorus Pennell sect. Penstemon |
| | Penstemon nitidus Douglas ex Benth. sect. Coerulei |
| | Penstemon oklahomensis Pennell sect. Penstemon |
| | Penstemon pallidus Small sect. Penstemon |
| | Penstemon procerus Douglas ex Graham sect. Penstemon |
| | Petrophytum caespitosum (Nutt.) Rydb. |
| | Phemeranthus calycinus (Engelm.) Kiger |
| | Phemeranthus parviflorus (Nutt.) Kiger |
| | Phemeranthus rugospermus (Holz.) Kiger |
| | Phemeranthus calcaricus (S.Ware) Kiger |
| | Phlox alyssifolia Greene Microphlox, Albomarginata |
| | Phlox andicola (Britton) E.E.Nelson Microphlox, Multiflorae |
| | Phlox bifida L.C.Beck Alphaphlox, Subulatae |
| | Phlox carolina L. Alphaphlox, Ovatae |
| | Phlox diffusa Benth. Microphlox, Canescentes |
| | Phlox divaricata L. Protophlox, Divaricatae |
| | Phlox hoodii Richardson Microphlox, Canescentes |
| | Phlox oklahomensis Wherry Protophlox, Speciosae |
| | Phlox pilosa L. Protophlox, Divaricatae |
| | Phlox subulata L. Alphaphlox, Subulatae |
| | Phyla cuneifolia (Torr.) Greene |
| | Phyla lanceolata (Michx.) Greene |
| | Physaria acutifolia Rydb. |
| | Physaria arenosa (Richardson) O´Kane & Al-Shehbaz |
| | Physaria brassicoides Rydb. |
| | Physaria engelmannii (A.Gray) O´Kane & Al-Shehbaz |
| | Physaria fendleri (A.Gray) O´Kane & Al-Shehbaz |
| | Physaria ludoviciana (Nutt.) O´Kane & Al-Shehbaz |
| | Physaria montana (A.Gray) Greene |
| | Physaria ovalifolia (Rydb.) O´Kane & Al-Shehbaz |
| | Physaria reediana O´Kane & Al-Shehbaz |
| | Physaria spatulata (Rydb.) Grady & O´Kane |
| | Picradeniopsis oppositifolia (Nutt.) Rydb. trib. Helenieae |
| | Picradeniopsis woodhousei (A.Gray) Rydb. trib. Helenieae |
| | Pinaropappus roseus (Less.) Less. trib. Cichorieae |
| | Pinguicula vulgaris L. |
| | Polemonium brandegeei (A.Gray) Greene |
| | Polemonium reptans L. |
| | Polygala alba Nutt. |
| | Polygala senega L. |
| | Polygaloides paucifolia (Willd.) J.R.Abbott |
| | Potentilla concinna Richardson |
| | Potentilla effusa Douglas ex Lehm. |
| | Potentilla pensylvanica L. |
| | Potentilla plattensis Nutt. |
| | Primula fassettii A.R.Mast & Reveal |
| | Primula frenchii (Vasey) A.S.Mast & Reveal |
| | Primula incana M.E.Jones sect. Farinosae |
| | Primula meadia (L.) A.R.Mast & Reveal |
| | Primula mistassinica Michx. sect. Farinosae |
| | Primula pauciflora (Durand) A.R.Mast & Reveal |
| | Pulsatilla nuttalliana (DC.) Spreng. |
| | Pyrola americana G.Don |
| | Pyrola asarifolia Michx. |
| | Pyrola chlorantha Sw. |
| | Pyrola elliptica Nutt. |
| | Pyrola minor L. |
| | Pyrola picta Sm. |
| | |
| | Ranunculus fascicularis Muhl. ex Bigelow |
| | Ranunculus glaberrimus Hook. |
| | Ranunculus inamoenus Greene |
| | Ranunculus lapponicus L. |
| | Ranunculus rhomboideus Goldie |
| | Rhododendron lapponicum (L.) Wahlenb. |
| | Ribes curvatum Small |
| | Rubus chamaemorus L. |
| | Rumex venosus Pursh |
| | |
| | Sabulina dawsonensis (Britton) Rydb. |
| | Sabulina rubella (Wahlenb.) Dillenb. & Kadereit |
| | Salvia lyrata L. |
| | Sanguinaria canadensis L. |
| | Saxifraga cernua L. sect. Mesogyne |
| | Saxifraga paniculata Mill. sect. Ligulatae |
| | Scutellaria brittonii Porter |
| | Scutellaria parvula Michx. |
| | Scutellaria resinosa Torr. |
| | Scutellaria wrightii A.Gray |
| | Sedum lanceolatum Torr. |
| | Sedum pulchellum Michx. sect. Genuina |
| | Sedum ternatum Michx. |
| | Sibbaldia tridentata (Aiton) Paule & Soják |
| | Silene caroliniana Walter |
| | Silene menziesii Hook. |
| | Silene virginica L. |
| | Solidago mollis Bartling trib. Astereae |
| | Sphaeralcea coccinea (Nutt.) Rydb. |
| | Spigelia marilandica L. |
| | Stachys hyssopifolia Michx. |
| | Stellaria longipes Goldie |
| | Stenotus armerioides Nutt. trib. Astereae |
| | Stephanomeria runcinata Nutt. trib. Cichorieae |
| | Stylophorum diphyllum (Michx.) Nutt. |
| | Sullivantia sullivantii (Torr. & A.Gray) Britton |
| | Symphyotrichum fendleri (A.Gray) G.L.Nesom trib. Astereae |
| | |
| | Tanacetum bipinnatum (L.) Sch.Bip. trib. Anthemideae |
| | Tetraneuris acaulis (Pursh) Greene trib. Helenieae |
| | Tetraneuris herbacea Greene trib. Helenieae |
| | Tetraneuris scaposa (DC.) Greene trib. Helenieae |
| | Teucrium laciniatum Torr. |
| | Thelesperma subnudum A.Gray trib. Coreopsidae |
| | Thermopsis rhombifolia (Pursh) Richardson trib. Thermopsideae |
| | Tiarella cordifolia L. |
| | Townsendia exscapa (Richardson) Porter trib. Astereae |
| | Townsendia grandiflora Nutt. trib. Astereae |
| | Townsendia hookeri Beaman trib. Astereae |
| | Townsendia texensis Larsen trib. Astereae |
| | |
| | Vaccinium angustifolium Aiton |
| | Vaccinium cespitosum Michx. |
| | Vaccinium macrocarpon Aiton |
| | Vaccinium membranaceum Douglas ex Torr. |
| | Vaccinium myrtilloides Michx. |
| | Vaccinium oxycoccos L. |
| | Vaccinium scoparium Leiberg ex Coville |
| | Verbena bipinnatifida Nutt. |
| | Verbena canadensis (L.) Britton |
| | Veronica bullii (Eaton) M.M.Mart.Ort. & Albach subgen. Synthyris |
| | Veronica wyomingensis (A.Nelson) M.M.Mart.Ort. & Albach subgen. Synthyris |
| | Vesper montanus (Torr. & A.Gray) R.L.Hartm. & G.L.Nesom |
| | Viola adunca Sm. sect. Viola |
| | Viola affinis Leconte |
| | Viola bernardii (Greene) Greene |
| | Viola blanda Willd. sect. Viola |
| | Viola canadensis L. sect. Viola |
| | Viola cucullata Aiton sect. Viola |
| | Viola labradorica Schrank sect. Viola |
| | Viola lanceolata L. sect. Viola |
| | Viola macloskeyi F.E.Lloyd sect. Viola |
| | Viola missouriensis Greene |
| | Viola nephrophylla Greene sect. Viola |
| | Viola novae-angliae House |
| | Viola nuttallii Pursh sect. Viola |
| | Viola palmata L. sect. Viola |
| | Viola pedata L. |
| | Viola pedatifida G.Don sect. Viola |
| | Viola primulifolia L. sect. Viola |
| | Viola pubescens Aiton sect. Viola |
| | Viola renifolia A.Gray |
| | Viola rostrata Muhl. ex Pursh |
| | Viola sagittata Aiton |
| | Viola selkirkii Pursh ex Goldie sect. Viola |
| | Viola sororia Willd. sect. Viola |
| | Viola striata Aiton |
| | Viola vallicola A.Nelson |
| | Viola villosa Walter |
| | |
| | Waldsteinia fragarioides (Michx.) Tratt. |
| | |
| | Xanthisma grindelioides (Nutt.) D.R.Morgan & R.L.Hartm. trib. Astereae |
| | Xylorhiza glabriuscula Nutt. trib. Astereae |
| | |
| | Zinnia grandiflora Nutt. trib. Heliantheae |