Acmella occidentalis Nutt. accepted as Acmella repens (Walter) Rich. ex Pers. (original description)
Actinella Juss. ex Nutt. accepted as Hymenoxys Cass. (original description)
Actinella acaulis (Pursh) Nutt. accepted as Tetraneuris acaulis (Pursh) Greene (new combination reference)
Actinomeris Nutt. accepted as Verbesina L. (original description)
Actinomeris alata Nutt. accepted as Verbesina occidentalis (L.) Walter (original description)
Actinomeris helianthoides (Michx.) Nutt. (original description)
Actinomeris ovata (Cav.) Nutt. accepted as Verbesina ovata (Cav.) A.Gray (original description)
Actinomeris squaeosa Nutt. (original description)
Actinomeris squarrosa var. alba (Michx.) Nutt. (original description)
Ambrosia tomentosa Nutt. (original description)
Arnica montana var. fulgens (Pursh) Nutt. (original description)
Artemisia cernua Nutt. accepted as Artemisia dracunculus var. dracunculus L. (original description)
Artemisia gnaphalodes Nutt. accepted as Artemisia ludoviciana Nutt. (original description)
Artemisia longifolia Nutt. (original description)
Artemisia ludoviciana Nutt. (original description)
Artemisia serrata Nutt. (original description)
Aster biennis Nutt. accepted as Dieteria canescens (Pursh) Nutt. (original description)
Aster flexuosus Nutt. accepted as Symphyotrichum tenuifolium (L.) G.L.Nesom (original description)
Aster floribundus Nutt. (original description)
Aster foliaceus var. coridifolius (Michx.) Nutt. (original description)
Aster gracilis Nutt. accepted as Eurybia compacta G.L.Nesom (original description)
Aster grandiflorus Nutt. (original description)
Aster lanceolatus Nutt. (original description)
Aster miser Nutt. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (original description)
Aster montanus Nutt. accepted as Symphyotrichum sericeum (Vent.) G.L.Nesom (original description)
Aster multiflorus Nutt. accepted as Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve (original description)
Aster nudiflorus Nutt. accepted as Eurybia radula (Sol. ex Aiton) G.L.Nesom (original description)
Aster oblongifolius Nutt. accepted as Symphyotrichum oblongifolium (Nutt.) G.L.Nesom (original description)
Aster paniculatus Nutt. (original description)
Aster pauciflorus Nutt. accepted as Almutaster pauciflorus (Nutt.) Á.Löve & D.Löve (original description)
Aster spectabilis var. bellidifolius Nutt. accepted as Eurybia spectabilis (Sol. ex Aiton) G.L.Nesom (original description)
Balduina multiflora Nutt. accepted as Balduina angustifolia (Pursh) B.L.Rob. (original description)
Balduina uniflora Nutt. (original description)
Baldwinia Nutt. accepted as Balduina Nutt. (original description)
Barkhausia caroliniana (Walter) Nutt. accepted as Pyrrhopappus carolinianus (Walter) DC. (original description)
Borkhausia Nutt. (original description)
Brachyris Nutt. accepted as Gutierrezia Lag. (original description)
Brachyris euthamiae Nutt. accepted as Gutierrezia sarothrae (Pursh) Britton & Rusby (original description)
Cacalia lanceolata Nutt. accepted as Arnoglossum ovatum (Walter) H.Rob. (original description)
Cacalia tuberosa Nutt. accepted as Arnoglossum plantagineum Raf. (original description)
Carduus discolor (Muhl. ex Willd.) Nutt. accepted as Cirsium discolor (Muhl. ex Willd.) Spreng. (original description)
Carduus glaber Nutt. accepted as Cirsium nuttallii DC. (original description)
Carduus pumilus Nutt. accepted as Cirsium pumilum var. pumilum (original description)
Carduus undulatus Nutt. accepted as Cirsium undulatum (Nutt.) Spreng. (original description)
Chrysocoma graveolens Nutt. accepted as Ericameria nauseosa var. graveolens (Nutt.) Reveal & Schuyler (original description)
Chrysocoma virgata Nutt. accepted as Bigelowia nudata (Michx.) DC. (original description)
Chrysopsis obovata Nutt. accepted as Oclemena reticulata (Pursh) G.L.Nesom (original description)
Cnicus glaber Nutt. accepted as Cirsium muticum Michx. (original description)
Coreopsis nudata Nutt. (original description)
Coreopsis palmata Nutt. (original description)
Coreopsis rosea Nutt. (original description)
Coreopsis senifolia var. rigida Nutt. accepted as Coreopsis major Walter (original description)
Coreopsis trichosperma var. aurea (Dryand. ex Aiton) Nutt. accepted as Bidens aurea (Aiton) Sherff (original description)
Dieteria pinnata Nutt. (original description)
Erigeron ambiguus Nutt. (original description)
Erigeron asper Nutt. accepted as Erigeron glabellus var. glabellus Nutt. (original description)
Erigeron glabellus Nutt. (original description)
Erigeron pumilus Nutt. (original description)
Erigeron pusillus Nutt. accepted as Erigeron canadensis L. (original description)
Gaillardia bicolor var. aristata (Pursh) Nutt. (original description)
Helianthus giganteus var. crinitus Nutt. (original description)
Helianthus pauciflorus Nutt. (original description)
Inula alba Nutt. accepted as Oligoneuron album (Nutt.) G.L.Nesom accepted as Solidago ptarmicoides (Torr. & A.Gray) B.Boivin (original description)
Inula amygdalina (Lam.) Nutt. accepted as Aster umbellatus Mill. accepted as Doellingeria umbellata (Mill.) Nees (original description)
Inula divaricata Nutt. accepted as Croptilon divaricatum (Nutt.) Raf. (original description)
Inula mariana var. falcata (Pursh) Nutt. accepted as Pityopsis falcata (Pursh) Nutt. (original description)
Inula subg. Chrysopsis Nutt. accepted as Chrysopsis (Nutt.) Elliott (original description)
Inula trichophylla Nutt. accepted as Chrysopsis gossypina subsp. gossypina (Michx.) Elliot (original description)
Inula villosa (Pursh) Nutt. accepted as Chrysopsis villosa (Pursh) Nutt. ex DC. (original description)
Iva xanthiifolia Nutt. (original description)
Krigia amplexicaulis (Michx.) Nutt. accepted as Krigia biflora (Walter) S.F.Blake (original description)
Krigia caroliniana Nutt. accepted as Krigia virginica (L.) Willd. (original description)
Krigia dandelion (L.) Nutt. (original description)
Krigia dichotoma Nutt. accepted as Krigia virginica (L.) Willd. (original description)
Krigia montana (Michx.) Nutt. (original description)
Lactuca hirsuta Muhl. ex Nutt. (original description)
Lactuca integrifolia Nutt. accepted as Lactuca tatarica (L.) C.A.Mey. (original description)
Leptopoda Nutt. accepted as Helenium L. (original description)
Leptopoda helenium Nutt. (original description)
Liatris corymbosa Nutt. accepted as Carphephorus corymbosus (Nutt.) Torr. & A.Gray (original description)
Liatris pilosa var. gracilis (Pursh) Nutt. accepted as Liatris gracilis Pursh (original description)
Liatris resinosa Nutt. accepted as Liatris spicata (L.) Willd. (original description)
Liatris tenuifolia Nutt. (original description)
Mikania pubescens Nutt. (original description)
Polypteris Nutt. (original description)
Polypteris integrifolia Nutt. accepted as Palafoxia integrifolia (Nutt.) Torr. & A.Gray (original description)
Prenanthes aphylla Nutt. accepted as Lygodesmia aphylla (Nutt.) DC. (original description)
Rudbeckia gracilis Nutt. (original description)
Rudbeckia laevigata Nutt. (original description)
Rudbeckia purpurea var. serotina Nutt. accepted as Echinacea serotina (Nutt.) DC. (original description)
Rudbeckia spathulata Nutt. (original description)
Senecio integerrimus Nutt. (original description)
Senecio integrifolius Nutt. (original description)
Senecio kalmii Nutt. (original description)
Silphium pumilum var. tomentosum (Pursh) Nutt. (original description)
Solidago erecta Nutt. (original description)
Solidago puberula Nutt. (original description)
Solidago pulverulenta Nutt. accepted as Solidago puberula subsp. pulverulenta (Nutt.) Semple (original description)
Solidago speciosa Nutt. (original description)
Sonchus ludovicianus Nutt. accepted as Lactuca ludoviciana (Nutt.) Riddell (original description)