Achyrocline rugosa Gardner accepted as Stenocline chionaea (ex de Candolle) DC. (original description)
Achyrocline saturejoides Gardner accepted as Achyrocline gardnerii (Baker) Deble & Marchiori (original description)
Amphicalea fruticosa Gardner accepted as Calea rotundifolia (Less.) Baker (original description)
Amphicalea gentianoides Gardner accepted as Calea gentianoides DC. (original description)
Anomostephium angustifolium Gardner accepted as Aspilia foliacea (Spreng.) Baker (original description)
Anomostephium foliosum Gardner accepted as Aspilia foliosa (Gardner) Baker (original description)
Aster camporum Gardner accepted as Inulopsis camporum (Gardner) G.L.Nesom (original description)
Aster longipes Gardner accepted as Inulopsis scaposa (DC.) O.Hoffm. (original description)
Baccharis bupleuroides Gardner accepted as Baccharis ligustrina DC. (original description)
Baccharis curvifolia Gardner accepted as Baccharis leptocephala DC. (original description)
Baccharis elliptica Gardner (original description)
Baccharis fuchsiifolia Gardner accepted as Baccharis dentata (Vell.) G.M.Barroso (original description)
Baccharis inamoena Gardner accepted as Baccharis rufidula (Spreng.) Joch.Müll. (original description)
Baccharis intermixta Gardner (original description)
Baccharis lanuginosa Gardner accepted as Baccharis helichrysoides DC. (original description)
Baccharis lychnophora Gardner (original description)
Baccharis oleifolia Gardner accepted as Baccharis calvescens DC. (original description)
Baccharis polyphylla Gardner (original description)
Baccharis ramosissima Gardner accepted as Baccharis retusa DC. (original description)
Baccharis recurvata Gardner accepted as Baccharis caprariifolia DC. (original description)
Baccharis rivularis Gardner (original description)
Baccharis subcapitata Gardner accepted as Baccharis subdentata DC. (original description)
Baccharis subspathulata Gardner accepted as Baccharis linearifolia (Lam.) Pers. (original description)
Baccharis truncata Gardner (original description)
Baccharis varians Gardner accepted as Baccharis linearifolia (Lam.) Pers. (original description)
Bidens patula Gardner accepted as Bidens segetum var. patula (Gardner) Sherff (original description)
Bidens venosa Gardner accepted as Bidens cernua L. (original description)
Blainvillea polycephala Gardner accepted as Spilanthes acmella (L.) Murray accepted as Blainvillea acmella (L.) Philipson (original description)
Blainvillea racemosa Gardner (original description)
Calea angustifolia Gardner accepted as Calea multiplinervia Less. (original description)
Calea eupatorioides Gardner accepted as Calea serrata Less. (original description)
Calea lantanoides Gardner (original description)
Calea longifolia Gardner accepted as Calea multiplinervia Less. (original description)
Calea reticulata Gardner (original description)
Calea subrotunda Gardner accepted as Calea lantanoides Gardner (original description)
Calea tomentosa Gardner accepted as Tetrachyron grayi (Klatt) Wussow & Urbatsch (original description)
Echinocephalum Gardner (original description)
Echinocephalum angustifolium Gardner accepted as Melanthera latifolia (Gardner) Cabrera (original description)
Echinocephalum lanceolatum Gardner accepted as Melanthera latifolia (Gardner) Cabrera (original description)
Echinocephalum latifolia Gardner (original description)
Echinocephalum latifolium Gardner accepted as Melanthera latifolia (Gardner) Cabrera (original description)
Enydra anagallis Gardner (original description)
Enydra integrifolia Gardner accepted as Enydra sessilifolia (Ruiz & Pav.) Cabrera (original description)
Enydra rivularis Gardner accepted as Enydra sessilifolia (Ruiz & Pav.) Cabrera (original description)
Erechtites organensis Gardner accepted as Erechtites valerianifolius (Link ex Wolf) Less. ex DC. (original description)
Erechtites sulcatus Gardner (original description)
Erigeron scaberrimus Gardner accepted as Leptostelma maximum D.Don (original description)
Glossogyne brasiliensis Gardner accepted as Isostigma brasiliense (Gardner) B.D.Jacks. (original description)
Gymnopsis fruticosa Gardner accepted as Aspilia fruticosa (Gardner) Baker (original description)
Gymnopsis kunthiana Gardner accepted as Aspilia kunthiana (Gardner) S.F.Blake (original description)
Gymnopsis microcephala Gardner accepted as Eleutheranthera ruderalis (Sw.) Sch.Bip. (original description)
Hymenopholis Gardner accepted as Lucilia Cass. (original description)
Hymenopholis imbricata Gardner accepted as Lucilia lycopodioides (Less.) S.E.Freire (original description)
Ichthyothere latifolia (Benth.) Gardner (original description)
Lipochaeta goyazensis Gardner (original description)
Melampodium paniculatum Gardner (original description)
Meyeria angustifolia Gardner (original description)
Meyeria candolleana Gardner (original description)
Meyeria elongata Gardner (original description)
Meyeria hypericifolia Gardner (original description)
Meyeria microphylla Gardner (original description)
Meyeria teucriifolia Gardner (original description)
Oyedaea angustifolia Gardner (original description)
Platystephium Gardner accepted as Egletes Cass. (original description)
Platystephium graveolens Gardner accepted as Egletes viscosa (L.) Less. (original description)
Porophyllum angustissimum Gardner (original description)
Riencourtia angustifolia Gardner accepted as Riencourtia oblongifolia Gardner (original description)
Riencourtia latifolia Gardner (original description)
Riencourtia oblongifolia Gardner (original description)
Riencourtia tenuifolia Gardner (original description)
Senecio camporum Gardner accepted as Senecio adamantinus Bong. (original description)
Senecio dumetorum Gardner (original description)
Senecio goyazensis Gardner accepted as Erechtites goyazensis (Gardner) Cabrera (original description)
Senecio grandis Gardner (original description)
Senecio imbricatus Gardner accepted as Hoehnephytum imbricatum (Gardner) Cabrera (original description)
Senecio trixoides Gardner accepted as Hoehnephytum trixoides (Gardner) Cabrera (original description)
Serpaea Gardner accepted as Oyedaea DC. (original description)
Serpaea oblonga Gardner accepted as Dimerostemma oblongum (Gardner) M.D.Moraes (original description)
Serpaea ovata Gardner (original description)
Spilanthes arrayana Gardner accepted as Acmella brachyglossa Cass. (original description)
Spilanthes ecliptoides Gardner accepted as Jaegeria hirta (Lag.) Less. (original description)
Spilanthes melampodioides Gardner accepted as Acmella ciliata (Kunth) Cass. (original description)
Verbesina floribunda Gardner (original description)
Verbesina helianthoides Gardner (original description)
Verbesina lancifolia Gardner accepted as Verbesina macrophylla (Cass.) S.F.Blake (original description)
Viguiera asperrima Gardner accepted as Aspilia attenuata (Gardner) Baker (original description)
Viguiera attenuata Gardner accepted as Aspilia attenuata (Gardner) Baker (original description)
Viguiera bonplandiana Gardner accepted as Aspilia bonplandiana (Gardner) S.F.Blake (original description)
Viguiera bracteata Gardner accepted as Aldama bracteata (Gardner) E.E.Schill. & Panero (original description)
Viguiera elegans Gardner accepted as Aspilia foliacea (Spreng.) Baker (original description)
Viguiera floribunda Gardner accepted as Aspilia floribunda (Gardner) Baker (original description)
Viguiera glabra Gardner accepted as Aspilia foliacea (Spreng.) Baker (original description)
Viguiera gracilis Gardner accepted as Aspilia floribunda (Gardner) Baker (original description)
Viguiera grandiflora (Gardner) Gardner accepted as Aldama grandiflora (Gardner) E.E.Schill. & Panero (original description)
Viguiera hirsuta Gardner accepted as Aspilia foliacea (Spreng.) Baker (original description)
Viguiera humboldtiana Gardner (original description)
Viguiera kunthiana Gardner (original description)
Viguiera nervosa Gardner (original description)
Viguiera oblongifolia Gardner accepted as Aldama oblongifolia (Gardner) E.E.Schill. & Panero (original description)
Viguiera ramosissima Gardner accepted as Aspilia floribunda (Gardner) Baker (original description)