Acanthodesmos gibarensis P.Herrera & P.A.González (basis of record)
Acanthospermum Schrank (additional source)
Acanthospermum australe (Loefl.) Kuntze (additional source)
Achillea L. (basis of record)
Achillea adeniae Aytaç & Ekici (basis of record)
Achillea alpina var. rhodoptarmica (Nakai) M.Kim (basis of record)
Achillea baltae H.Duman & Aytaç (basis of record)
Achillea ceretanica (Sennen) I.Soriano (basis of record)
Achillea grandifolia subsp. hellenica Kit Tan, Zarkos, V.Christodoulou & Vold (basis of record)
Achillea jenisseensis Stepanov (basis of record)
Achillea kamelinii Kupr. (basis of record)
Achillea kuprijanovii Stepanov (basis of record)
Achillea millefolium L. (basis of record)
Achillea ptarmica L. (basis of record)
Achillea schauloi Stepanov (basis of record)
Acilepis anaimudica (B.V.Shetty & Vivek.) Kottaim. (basis of record)
Acilepis kerrii (Craib) Bunwong, Chantar. & S.C.Keeley (basis of record)
Acilepis pothigaiana (Chellad. & Gopalan) Kottaim. (basis of record)
Acilepis pulneyensis (Gamble) Kottaim. (basis of record)
Acritopappus jacobaeus Bautista, Rodr.Oubiña & S.Ortiz (basis of record)
Acritopappus stenophyllus Bautista, Rodr.Oubiña & S.Ortiz (basis of record)
Acunniana Orchard (basis of record)
Acunniana procumbens (DC.) Orchard (basis of record)
Adenophyllum yecoranum B.L.Turner (basis of record)
Adenostyles australis (Ten.) Iamonico & Pignatti (basis of record)
Ageratina calophylla (Greene) R.M.King & H.Rob. ex Molinari & Mayta (basis of record)
Ageratina crassimonticola Rzed. (basis of record)
Ageratina cuicatlana B.L.Turner (basis of record)
Ageratina eleazarii Rzed. (basis of record)
Ageratina etlana B.L.Turner (basis of record)
Ageratina jalpanserra B.L.Turner (basis of record)
Ageratina megaphylla B.L.Turner (basis of record)
Ageratina pauciflora B.L.Turner (basis of record)
Ageratina roanensis (Small) E.E.Lamont (basis of record)
Ageratina tejalapana B.L.Turner (basis of record)
Ageratina zaragozana B.L.Turner (basis of record)
Ageratum grossedentatum Rzed. (basis of record)
Ageratum koulianum Bhellum (basis of record)
Agrostis L. (basis of record)
Agrostis canina L. (basis of record)
Agrostis capillaris L. (basis of record)
Agrostis castellana Boiss. & Reuter (basis of record)
Agrostis gigantea Roth (basis of record)
Agrostis stolonifera L. (basis of record)
Ainsliaea hederifolia Fujikawa & H.Ikeda (basis of record)
Ainsliaea pertyoides subsp. albotomentosa (Beauverd) T.G.Gao (basis of record)
Aira L. (basis of record)
Aira L. (additional source)
Aira praecox L. (basis of record)
Ajania semnanensis Sonboli (basis of record)
Alchemilla L. (basis of record)
Alchemilla monticola Opiz (basis of record)
Aldama ayutlana (B.L.Turner) B.L.Turner (basis of record)
Aldama corumbensis (Malme) Magenta & Pirani (basis of record)
Aldama gardneri var. ovatifolia Magenta (basis of record)
Aldama huajicoria (B.L.Turner) B.L.Turner (basis of record)
Aldama iltishii (B.L.Turner) B.L.Turner (basis of record)
Aldama megapotamica (Malme) Magenta & Pirani (basis of record)
Aldama misionensis (A.A.Sáenz) S.E.Freire (basis of record)
Aldama palmeri var. coalcomana (B.L.Turner) B.L.Turner (basis of record)
Aldama paranensis (Malme) Magenta & Pirani (basis of record)
Aldama tuberosa var. guaranitica (Chodat) Magenta (basis of record)
Alopecurus L. (basis of record)
Alopecurus geniculatus L. (basis of record)
Alopecurus pratensis L. (basis of record)
Amberboa maroofii Negaresh (basis of record)
Amberboa zanjanica Ranjbar & Negaresh (basis of record)
Amphiglossa foliosa J.C.Manning & Helme accepted as Pterothrix cymbifolia Harv. (basis of record)
Anagallis arvensis L. (basis of record)
Andryala cintrana Talavera & M.Talavera (basis of record)
Andryala perezii M.Z.Ferreira, R.Jardim, Alv.Fern. & M.Seq. (basis of record)
Andryala pinnatifida subsp. cuneifolia (Sch.Bip.) M.Z.Ferreira, R.Jardim, Alv.Fern. & M.Seq. (basis of record)
Angianthus globuliformis M.Lyons & Keighery (basis of record)
Anisopappus brandbergensis (P.P.J.Herman) Bengtson, M.Englund, Pruski & Anderb. (basis of record)
Anisopappus schinzii (O.Hoffm.) Bengtson, M.Englund, Pruski & Anderb. (basis of record)
Anisopappus stuhlmannii (O.Hoffm.) Bengtson, M.Englund, Pruski & Anderb. (basis of record)
Antennaria sawyeri R.J.Bayer & Figura (basis of record)
Anteremanthus piranii Roque & F.A.Santana (basis of record)
Anthemis Mich. ex L. (basis of record)
Anthemis alpestris var. ligulata (Talavera) Benedí (basis of record)
Anthemis arvensis L. (basis of record)
Anthemis cotula L. (basis of record)
Anthemis funkii (Sch.Bip. ex Willk. & Lange) Benedí (basis of record)
Anthemis pignattiorum Guarino, Raimondo & Domina (basis of record)
Anthoxanthum odoratum L. (basis of record)
Anthriscus sylvestris (L.) Hoffm. (basis of record)
Anticona E.Linares, J.Campos & A.Galán (basis of record)
Anticona glareophila (Cuatrec.) E.Linares, J.Campos & A.Galán (basis of record)
Apowollastonia Orchard (basis of record)
Apowollastonia cylindrica Orchard (basis of record)
Apowollastonia hamersleyensis Orchard (basis of record)
Apowollastonia hibernica Orchard (basis of record)
Apowollastonia longipes (Klatt) Orchard (basis of record)
Apowollastonia major Orchard (basis of record)
Apowollastonia spilanthoides (F.Muell.) Orchard (basis of record)
Apowollastonia stirlingii (F.Muell. & Tate) Orchard (basis of record)
Apowollastonia stirlingii subsp. fontaliciana Orchard (basis of record)
Apowollastonia verbesinoides (F.Muell. ex Benth.) Orchard (basis of record)
Aquilula G.L.Nesom (basis of record)
Aquilula riskindii (B.L.Turner & G.Langford) G.L.Nesom (basis of record)