Acmella sect. Acmella (original description)
Actinomeris sect. Actinomeris (original description)
Ageratum subg. Ageratum (original description)
Archibaccharis sect. Archibaccharis (original description)
Artemisia sect. Artemisia (original description)
Baccharis subg. Baccharis (original description)
Baccharis subg. Baccharis sect. Baccharis (original description)
Baeria sect. Baeria (original description)
Bahia sect. Bahia (original description)
Barnadesia subg. Barnadesia (original description)
Berlandiera sect. Berlandiera (original description)
Brachyris sect. Brachyris (original description)
Burrielia sect. Burrielia (original description)
Calea sect. Calea (original description)
Calea subg. Calea (original description)
Carduus nyassanus subsp. nyassanus (S.Moore) R.E.Fr. (original description)
Centaurea sect. Centaurea (original description)
Centaurea subg. Centaurea (original description)
Centaurea subsect. Centaurea (original description)
Centipeda sect. Centipeda (original description)
Chrysogonum sect. Chrysogonum (original description)
Chrysopsis sect. Chrysopsis (original description)
Chrysopsis subg. Chrysopsis (original description)
Cosmos sect. Cosmos (original description)
Crepis sect. Crepis (original description)
Desmanthodium subg. Desmanthodium represented as Desmanthodium Benth. (original description)
Dieteria subg. Dieteria (original description)
Diodonta sect. Diodonta (original description)
Diplostephium ser. Diplostephium (original description)
Dyssodia sect. Dyssodia (original description)
Dyssodia subg. Dyssodia (original description)
Echinacea subg. Echinacea (original description)
Eclipta sect. Eclipta (original description)
Erigeron utahensis var. utahensis A.Gray (original description)
Evax sect. Evax (original description)
Franseria sect. Franseria (original description)
Heterotheca sect. Heterotheca (original description)
Hieracium sect. Hieracium (original description)
Homopappus sect. Homopappus (original description)
Homopappus subg. Homopappus (original description)
Isocarpha sect. Isocarpha (original description)
Iva sect. Iva (original description)
Krigia sect. Krigia (original description)
Laphamia sect. Laphamia (original description)
Lessingianthus sect. Lessingianthus (original description)
Liabum subg. Liabum (original description)
Lygodesmia sect. Lygodesmia (original description)
Lygodesmia subg. Lygodesmia (original description)
Macronema sect. Macronema (original description)
Madaroglossa sect. Madaroglossa (original description)
Malacothrix sect. Malacothrix (original description)
Micropus sect. Micropus (original description)
Microseris sect. Microseris (original description)
Pentachaeta sect. Pentachaeta (original description)
Pityopsis sect. Pityopsis (original description)
Pluchea subg. Pluchea (original description)
Ptilomeris sect. Ptilomeris (original description)
Schkuhria sect. Schkuhria (original description)
Seriphidium sect. Seriphidium (original description)
Spilanthes sect. Spilanthes (original description)
Stenotus sect. Stenotus (original description)
Taraxacum sect. Taraxacum (original description)
Taraxacum subsect. Taraxacum (original description)
Tessaria sect. Tessaria (original description)
Thelesperma sect. Thelesperma (original description)
Tithonia ser. Tithonia (original description)
Townsendia subg. Townsendia (original description)
Uropappus sect. Uropappus (original description)
Wyethia sect. Wyethia (original description)
Zexmenia sect. Zexmenia (original description)