Agathyrsus acuminatus (Willd.) Sweet (original description)
Agathyrsus macrophyllus (Willd.) Sweet accepted as Lactuca macrophylla (Willd.) A.Gray (original description)
Agathyrsus sonchifolius (Willd.) Sweet (original description)
Atalanthus arboreus (DC.) Sweet accepted as Sonchus arboreus DC. (original description)
Bidens ferulifolia (Jacq.) Sweet (original description)
Caesulia lancifolia Sweet (original description)
Carduus picris (Willd.) Sweet accepted as Rhaponticum repens (L.) Hidalgo (original description)
Carduus stoechadifolius (M.Bieb.) Sweet accepted as Jurinea stoechadifolia (M.Bieb.) DC. (original description)
Cineraria exsquamata Sweet (original description)
Diplostephium amygdalinum Sweet accepted as Doellingeria umbellata var. umbellata (Mill.) Nees (original description)
Diplostephium humile (Willd.) Sweet accepted as Aster infirmus Michx. accepted as Doellingeria infirma (Michx.) Greene (original description)
Diplostephium linifolium (L.) Sweet accepted as Aster linifolius L. accepted as Galatella sedifolia (L.) Greuter (original description)
Diplostephium rigidum (Pursh) Sweet accepted as Ionactis linariifolia (L.) Greene (original description)
Echinacea napifolia Sweet accepted as Iostephane heterophylla (Cav.) Benth. (original description)
Eclipta linearis Otto ex Sweet accepted as Eclipta prostrata (L.) L. (original description)
Erigeron involucratus Link ex Sweet (original description)
Filago asterisciflora (Lam.) Sweet (original description)
Georgina astrantiiflora Sweet (original description)
Grindelia nitida Bernh. ex Sweet (original description)
Grindelia villosa Douglas ex Sweet accepted as Grindelia integrifolia DC. (original description)
Neja D.Don (original description)
Neja gracilis D.Don accepted as Neja filiformis (Spreng.) Nees (original description)
Perdicium lyratum (Willd.) Sweet (original description)
Podanthus gratus D.Don ex Sweet (original description)
Rhaponticum doronicifolium Fisch. ex Sweet (original description)
Senecio spicatus Sweet (original description)
Soliva minuta (L.f.) Sweet accepted as Cotula mexicana (DC.) Cabrera (original description)
Sonchus hantonionsis Sweet accepted as Sonchus arvensis L. (original description)
Sonchus tenax Fisch. ex Sweet (original description)
Spilanthes multiflora Otto ex Sweet (original description)
Tragopogon rhodanthus Sweet accepted as Podospermum roseum (Waldst. & Kit.) Gemeinholzer & Greuter (original description)
Zexmenia tagetiflora D.Don ex Sweet (original description)