Adenocarpum D.Don ex Hook. & Arn. accepted as Chrysanthellum Rich. (original description)
Adenocarpum tuberculatum D.Don ex Hook. & Arn. accepted as Chrysanthellum indicum DC. (original description)
Adenospermum Hook. & Arn. accepted as Chrysanthellum Rich. (original description)
Adenospermum tuberculatum Hook. & Arn. accepted as Chrysanthellum indicum DC. (original description)
Amblyopappus Hook. & Arn. (original description)
Amblyopappus pusillus Hook. & Arn. (original description)
Ambrosia chilensis Hook. & Arn. accepted as Ambrosia artemisiifolia L. (original description)
Ambrosia scabra Hook. & Arn. (original description)
Ambrosia scabra var. robusta Hook. & Arn. accepted as Ambrosia scabra Hook. & Arn. (original description)
Ambrosia scabra var. tenuior Hook. & Arn. accepted as Ambrosia scabra Hook. & Arn. (original description)
Artemisia andicola Don ex Hook. & Arn. accepted as Artemisia mendozana DC. accepted as Seriphidium mendozanum (DC.) K.Bremer & Humphries (original description)
Baccharis albida Hook. & Arn. (original description)
Baccharis arguta Gillies ex Hook. & Arn. (original description)
Baccharis artemisioides Hook. & Arn. (original description)
Baccharis attenuata D.Don ex Hook. & Arn. accepted as Baccharis spicata (Lam.) Baill. (original description)
Baccharis bairdii Hook. & Arn. accepted as Baccharis caprariifolia DC. (original description)
Baccharis baldwinii Hook. & Arn. accepted as Baccharis linearifolia (Lam.) Pers. (original description)
Baccharis bracteata Hook. & Arn. accepted as Baccharis dracunculifolia DC. (original description)
Baccharis daphnoides Hook. & Arn. accepted as Baccharis singularis (Vell.) G.M.Barroso (original description)
Baccharis darwinii Hook. & Arn. (original description)
Baccharis doniana Hook. & Arn. accepted as Baccharis semiserrata DC. (original description)
Baccharis eupatorioides Hook. & Arn. accepted as Baccharis racemosa (Ruiz & Pav.) DC. (original description)
Baccharis flabellata Hook. & Arn. (original description)
Baccharis foliosa Gillies ex Hook. & Arn. accepted as Baccharis obovata Hook. & Arn. (original description)
Baccharis incisa Hook. & Arn. (original description)
Baccharis macraei Hook. & Arn. (original description)
Baccharis megapotamica Hook. & Arn. accepted as Baccharis linearifolia (Lam.) Pers. (original description)
Baccharis melastomatifolia Hook. & Arn. (original description)
Baccharis myrsinoides Hook. & Arn. accepted as Baccharis brevifolia DC. (original description)
Baccharis ovata Hook. & Arn. accepted as Baccharis racemosa (Ruiz & Pav.) DC. (original description)
Baccharis patagonica Hook. & Arn. (original description)
Baccharis prostrata Baldw. accepted as Baccharis linearifolia (Lam.) Pers. (original description)
Baccharis sphaerocephala Hook. & Arn. (original description)
Baccharis subulata D.Don accepted as Baccharis juncea (Lehm.) Desf. (original description)
Baccharis tenella Hook. & Arn. (original description)
Baccharis thymifolia Hook. & Arn. (original description)
Baccharis tucumanensis Hook. & Arn. (original description)
Baccharis tweediei Hook. & Arn. accepted as Baccharis subopposita DC. (original description)
Baccharis ulicina Hook. & Arn. (original description)
Baccharis verbenifolia Hook. & Arn. accepted as Baccharis hirta DC. (original description)
Baccharis vernicosa Hook. & Arn. (original description)
Bidens paradoxa D.Don ex Hook. & Arn. accepted as Thelesperma megapotamicum (Spreng.) Kuntze (original description)
Cephalophora doniana Hook. & Arn. accepted as Helenium donianum (Hook. & Arn.) Seckt (original description)
Cephalophora elongata D.Don ex Hook. accepted as Helenium donianum (Hook. & Arn.) Seckt (original description)
Cephalophora suffruticosa D.Don ex Hook. accepted as Helenium donianum (Hook. & Arn.) Seckt (original description)
Cineraria gualtata Gillies ex Hook. & Arn. accepted as Senecio hualtata Bertero ex DC. (original description)
Culcitium candidum D.Don ex Hook. & Arn. (original description)
Culcitium dentatum D.Don ex Hook. & Arn. (original description)
Culcitium depressum D.Don ex Hook. & Arn. accepted as Senecio depressus Hook. & Arn. (original description)
Gnaphalium alienum Hook. & Arn. (original description)
Helianthus heteropappus Gillies ex Hook. & Arn. accepted as Viguiera gilliesii (Hook. & Arn.) Hieron. (original description)
Helichrysum chilense Hook. & Arn. (original description)
Heterothalamus trinervis (Pers.) Hook. & Arn. accepted as Baccharis trinervis Pers. (original description)
Hymenatherum candolleanum Hook. & Arn. accepted as Thymophylla pentachaeta (DC.) Small (original description)
Lasiophyton Hook. & Arn. (original description)
Lasiophyton pusillum Hook. & Arn. accepted as Micropsis nana DC. (original description)
Lasthenia kunthii (Less.) Hook. & Arn. (original description)
Leighia gilliesii Hook. & Arn. accepted as Viguiera gilliesii (Hook. & Arn.) Hieron. (original description)
Leighia silphioides Hook. & Arn. accepted as Aspilia silphioides (Hook. & Arn.) Benth. & Hook.f. (original description)
Leighia stenophylla Hook. & Arn. accepted as Aldama anchusifolia (DC.) E.E.Schill. & Panero (original description)
Leighia tucumanensis Hook. & Arn. accepted as Viguiera tucumanensis (Hook. & Arn.) Griseb. (original description)
Leptinella acaenoides Hook. & Arn. accepted as Leptinella scariosa Cass. (original description)
Leptinella acaenoides var. major Hook. & Arn. (original description)
Oligogyne synedrelloides Hook. & Arn. accepted as Calyptocarpus biaristatus (DC.) H.Rob. (original description)
Pectis acicularis D.Don ex Hook. & Arn. (original description)
Schkuhria abrotanoides Don ex Hook. & Arn. (original description)
Schkuhria bonariensis Hook. & Arn. accepted as Schkuhria pinnata (Lam.) Kuntze ex Thell. (original description)
Schkuhria multiflora Hook. & Arn. accepted as Picradeniopsis multiflora (Hook. & Arn.) B.G.Baldwin (original description)
Senecio albicaulis Hook. & Arn. (original description)
Senecio albicaulis var. subglaber Hook. & Arn. (original description)
Senecio alcicornis Hook. & Arn. (original description)
Senecio bahioides Hook. & Arn. (original description)
Senecio bahioides var. glaber Hook. & Arn. accepted as Senecio bahioides Hook. & Arn. (original description)
Senecio bahioides var. lanosus Hook. & Arn. accepted as Senecio bahioides Hook. & Arn. (original description)
Senecio barbatus Don ex Hook. & Arn. accepted as Senecio pogonias Cabrera (original description)
Senecio bonariensis Hook. & Arn. (original description)
Senecio bracteolatus Hook. & Arn. (original description)
Senecio brunonianus Hook. & Arn. (original description)
Senecio candolleanus Hook. & Arn. accepted as Senecio leucopeplus Cabrera (original description)
Senecio cannabinifolius Hook. & Arn. accepted as Senecio brasiliensis (Spreng.) Less. (original description)
Senecio caricifolius Hook. & Arn. (original description)
Senecio ceratophyllus Don ex Hook. & Arn. accepted as Senecio ceratophylloides Griseb. (original description)
Senecio ceratophyllus var. major Hook. & Arn. (original description)
Senecio ceratophyllus var. nanus Hook. & Arn. (original description)
Senecio chrysocomoides Hook. & Arn. (original description)
Senecio crithmoides Hook. & Arn. (original description)
Senecio cumingii Hook. & Arn. (original description)
Senecio darwinii Hook. & Arn. (original description)
Senecio darwinii var. laxus Hook. & Arn. accepted as Senecio darwinii Hook. & Arn. (original description)
Senecio depressus Hook. & Arn. (original description)
Senecio donianus Hook. & Arn. (original description)
Senecio doroniciflorus (DC.) Hook. & Arn. accepted as Senecio selloi (Spreng.) DC. (original description)
Senecio eightsii Hook. & Arn. (original description)
Senecio farinifer Hook. & Arn. (original description)
Senecio fasciculatus Hook. & Arn. (original description)
Senecio gilliesii Hook. & Arn. (original description)
Senecio glandulosus Don ex Hook. & Arn. (original description)
Senecio gummifer Hook. & Arn. (original description)
Senecio hakeifolius var. adenophyllus Hook. & Arn. (original description)
Senecio hakeifolius var. viscidus Hook. & Arn. (original description)