Antennaria margaritacea (L.) Sweet accepted as Anaphalis margaritacea (L.) Benth. & Hook.f. (original description)
Antennaria plantaginea Sweet accepted as Anaphalis margaritacea (L.) Benth. & Hook.f. (original description)
Aphelexis ericoides Sweet accepted as Dolichothrix ericoides (Lam.) Hilliard & B.L.Burtt (original description)
Astelma fragrans Sweet accepted as Helichrysum fragrans Andrews ex Steud. (original description)
Astelma retorta D.Don ex Sweet accepted as Helichrysum retortum (L.) Willd. (original description)
Astelma spiralis (Andrews) D.Don ex Sweet accepted as Syncarpha variegata (P.J.Bergius) B.Nord. (original description)
Calcitrapa aegyptiaca (L.) Sweet accepted as Centaurea aegyptiaca L. (original description)
Calcitrapa balsamita (Lam.) Sweet accepted as Stizolophus balsamita (Lam.) K.Koch (original description)
Calcitrapa benedicta (L.) Sweet accepted as Centaurea benedicta (L.) L. (original description)
Calcitrapa centauroides (L.) Sweet accepted as Centaurea centauroides L. (original description)
Calcitrapa hybrida Sweet accepted as Centaurea calcitrapa L. (original description)
Calcitrapa phoenicea Sweet accepted as Centaurea calcitrapa L. (original description)
Calcitrapa pubescens (Willd.) Sweet accepted as Centaurea pubescens Willd. (original description)
Calcitrapa reflexa (Lam.) Sweet accepted as Centaurea reflexa Lam. (original description)
Calcitrapa rigida (Banks & Sol.) Sweet accepted as Centaurea rigida Willd. accepted as Centaurea rigescens Hornem. (original description)
Calcitrapa rupestris (L.) Sweet accepted as Centaurea rupestris L. (original description)
Calcitrapa sordida Sweet (original description)
Carduncellus arborescens Sweet accepted as Carthamus arborescens L. accepted as Phonus arborescens (L.) G.López (original description)
Carduus argutus Sweet accepted as Serratula tinctoria L. (original description)
Carduus xeranthemoides Sweet accepted as Klasea erucifolia (L.) Greuter & Wagenitz (original description)
Cineraria pulchella Sweet (original description)
Coelestina suffruticosa Sweet accepted as Ageratum conyzoides L. (original description)
Crocodilium aureum Sweet accepted as Centaurea aurea Dryand. ex Aiton (original description)
Crocodilium cucullatum Sweet accepted as Centaurea crocodylium L. (original description)
Crocodilium muricatum Sweet (original description)
Crocodilium salmanticum Sweet accepted as Mantisalca salmantica (L.) Briq. & Cavill. (original description)
Crocodilium verutum Sweet accepted as Centaurea verutum L. (original description)
Hapalostephium D.Don ex Sweet (original description)
Hapalostephium austriacum Sweet (original description)
Helichrysum conicum Sweet (original description)
Helichrysum dasyanthum (Willd.) Sweet (original description)
Helichrysum discolorum D.Don ex Sweet (original description)
Helichrysum graveolens (M.Bieb.) Sweet (original description)
Helichrysum herbaceum (Andrews) Sweet (original description)
Helichrysum lasiocaulon Sweet (original description)
Helichrysum odoratissimum (L.) Sweet (original description)
Helichrysum tephrodes Sweet (original description)
Helichrysum teretifolium Sweet (original description)
Heliopsis helianthoides (L.) Sweet (original description)
Heracantha glauca Sweet (original description)
Liatris turbinata Sweet accepted as Liatris spicata (L.) Willd. (original description)
Onobroma tingitana Sweet (original description)
Ozothamnus cinereus (Lab.) Sweet (original description)
Podospermum asperrimum (Willd.) Sweet accepted as Leontodon asperrimus (Willd.) Endl. (original description)
Podospermum asperum (Desf.) Sweet accepted as Hymenonema aspera (Desf.) DC. (original description)
Podospermum pumilum (Cav.) Sweet accepted as Launaea pumila (Cav.) Kuntze (original description)
Podospermum taraxacifolium (Jacq.) Sweet accepted as Hypochaeris glabra L. (original description)
Seridia adami Sweet (original description)
Seridia aspera Sweet (original description)
Seridia auriculata Sweet (original description)
Seridia cruenta Sweet (original description)
Seridia ferox Sweet (original description)
Seridia isnardii Sweet (original description)
Seridia latifolia Sweet (original description)
Seridia melitensis Sweet (original description)
Seridia napifolia Sweet (original description)
Seridia polyacantha Sweet (original description)
Seridia prolifera Sweet (original description)
Seridia pullata Sweet (original description)
Seridia romana Sweet (original description)
Seridia sicula Sweet (original description)
Seridia solstitialis Sweet (original description)
Seridia sonchifolia Sweet (original description)
Seridia straminea Sweet (original description)
Seridia sulphurea Sweet (original description)
Serratula alata Sweet (original description)
Serratula serrata Sweet (original description)
Sideranthus villosus Sweet (original description)
Sigesbeckia droseroides Sweet accepted as Sigesbeckia jorullensis Kunth (original description)
Soliva anthemifolia (Juss.) Sweet (original description)
Soliva stolonifera (Brot.) R.Br. ex Sweet (original description)
Sphenogyne foeniculacea Sweet (original description)
Sphenogyne leucanthemoides Sweet (original description)