• ×Anthematricaria dominii Rohlena
• ×Anthemimatricaria inolens P.Fourn.
• ×Anthemimatricaria maleolens P.Fourn.
• ×Anthemimatricaria sulfurea P.Fourn.
• ×Argyrautia degeneri Sherff
• ×Asterigeron ucrainicus Tzvelev (uncertain > unassessed)
• ×Carduogalactites ludoviciae (Bertr.) P.Fourn.
• ×Chrysaboltonia pulcherrima Arends (uncertain > unassessed)
• ×Chrysanthemoachillea borzae Prodan (uncertain > unassessed)
• ×Chrysanthemoachillea carmen-sylvae Prodan ex Nyár. (uncertain > unassessed)
• ×Cirsio-carduus borderi (Rouy) Arènes (uncertain > unassessed)
• ×Cirsio-carduus cirsiformis (Vuk.) Arènes
• ×Cirsio-carduus hohenackeri Arènes
• ×Cirsio-carduus jaubertianus (Sennen & Septimin) Arènes
• ×Cirsio-carduus lutetianus Arènes
• ×Cirsio-carduus parisiensis P.Fourn.
• ×Crepi-Hieracium garnieri (Petitm.) P.Fourn.
• ×Filfia mixta (Holuby) Holub
• ×Heterokalimeris maruyamae Kitam. (uncertain > unassessed)
• ×Solidaster hybridus Wehrhahn (uncertain > unassessed)
• ×Solidaster lutens M.L.Green
• ×Solidaster luteus (Everett) M.L.Green (uncertain > unassessed)
• ×Solidaster luteus (Everett) M.L.Green ex Dress
• Aaronsohnia factorovskyi Warb. & Eig
• Aaronsohnia pubescens (Desf.) K.Bremer & Humphries
• Aaronsohnia pubescens subsp. maroccana (Ball) Fennane & Ibn Tattou
• Aaronsohnia pubescens subsp. pubescens (Desf.) K.Bremer & Humphries
• Abrotanella caespitosa Petrie ex Kirk
• Abrotanella diemii Cabrera
• Abrotanella emarginata (Gaudich.) Cass.
• Abrotanella fertilis Swenson
• Abrotanella forsterioides (Hook.f.) Benth. (uncertain > unassessed)
• Abrotanella forsteroides (Hook.f.) Benth. (uncertain > unassessed)
• Abrotanella inconspicua Hook.f.
• Abrotanella linearifolia A.Gray
• Abrotanella linearis Berggr.
• Abrotanella muscosa Kirk
• Abrotanella nivigena (F.Muell.) F.Muell. (uncertain > unassessed)
• Abrotanella nivigena (F.Muell.) F.Muell. ex Benth.
• Abrotanella patearoa Heads
• Abrotanella purpurea Swenson
• Abrotanella pusilla (Hook.f.) Hook.f.
• Abrotanella rostrata Swenson
• Abrotanella rosulata (Hook.f.) Hook.f.
• Abrotanella scapigera (F.Muell.) F.Muell. ex Benth. (uncertain > unassessed)
• Abrotanella spathulata (Hook.f.) Hook.f.
• Abrotanella submarginata A.Gray
• Abrotanella trichoachaenia Cabrera
• Abrotanella trilobata Swenson
• Acamptopappus shockleyi A.Gray
• Acamptopappus sphaerocephalus (Harv. & A.Gray) A.Gray
• Acamptopappus sphaerocephalus var. hirtellus S.F.Blake
• Acamptopappus sphaerocephalus var. sphaerocephalus (Harv. & A.Gray ex A.Gray) A.Gray
• Acanthocephalus amplexifolius Kar. & Kir.
• Acanthocephalus benthamianus Regel
• Acanthocladium dockeri F.Muell.
• Acanthodesmos distichus C.D.Adams & duQuesnay
• Acanthodesmos gibarensis P.Herrera & P.A.González (uncertain > unassessed)
• Acanthospermum australe (Loefl.) Kuntze
• Acanthospermum consobrinum S.F.Blake
• Acanthospermum glabratum (DC.) Wild
• Acanthospermum hispidum DC.
• Acanthospermum humile (Sw.) DC.
• Acanthospermum microcarpum B.L.Rob.
• Acanthostyles buniifolius (Hook. & Arn.) R.M.King & H.Rob.
• Acanthostyles saucechicoensis (Hieron.) R.M.King & H.Rob.
• Achillea ×albinea Bjelčić & K.Malý
• Achillea ×ambigua Sünd. (uncertain > unassessed)
• Achillea ×bichigeani Prodan (uncertain > unassessed)
• Achillea ×borzae Prodan (uncertain > unassessed)
• Achillea ×claudiopolitana Soó (uncertain > unassessed)
• Achillea ×graja Beyer
• Achillea ×graja var. ×graja
• Achillea ×graja var. albertina Beauverd & Bonati
• Achillea ×illiczevski Tzvelev
• Achillea ×jaborneggii Halácsy (uncertain > unassessed)
• Achillea ×joannis Prodan (uncertain > unassessed)
• Achillea ×mihalikii Prodan (uncertain > unassessed)
• Achillea ×prodani Degen (uncertain > unassessed)
• Achillea abrotanifolia Hort. ex Steud. (uncertain > unassessed)
• Achillea abrotanoides (Vis.) Vis.
• Achillea abscondita Wein (uncertain > unassessed)
• Achillea absinthifolia Boiss. (uncertain > unassessed)
• Achillea absinthifolia Clairv. (uncertain > unassessed)
• Achillea absinthoides Halácsy
• Achillea acuminata (Ledeb.) Sch.Bip.
• Achillea adeniae Aytaç & Ekici (uncertain > unassessed)
• Achillea adulterina Sünd. (uncertain > unassessed)
• Achillea aegyptiaca Hort. ex Steud. (uncertain > unassessed)
• Achillea aegyptiaca L.
• Achillea aegyptiaca S.G.Gmel. (uncertain > unassessed)
• Achillea aegyptiaca Sm. (uncertain > unassessed)
• Achillea ageratifolia (Sibth. & Sm.) Benth. & Hook.f.
• Achillea ageratifolia subsp. ageratifolia (Sm.) Benth. & Hook.f.
• Achillea ageratifolia subsp. aizoon (Griseb.) Heimerl
• Achillea ageratifolia subsp. serbica (Nyman) Heimerl
• Achillea ageratifolia var. ageratifolia
• Achillea ageratum L.
• Achillea albicans C.A.Mey. (uncertain > unassessed)
• Achillea albinea Bjelčić & Maly (uncertain > unassessed)