Achyrocline madioides Meyen & Walp. accepted as Achyrocline alata (Kunth) DC. (original description)
Ambrosia artemisioides Meyen & Walp. ex Meyen & Walp. (original description)
Anthemis chilensis Walp. (original description)
Aster bellidiastrum Nees ex Walp. (original description)
Aster panduratus Nees ex Walp. (original description)
Aster walpersianus Nees (original description)
Baccharis alnifolia Meyen & Walp. (original description)
Baccharis calistemioides Meyen & Walp. accepted as Baccharis linearis (Ruiz & Pav.) Pers. (original description)
Baccharis glauca Meyen & Walp. (original description)
Baccharis meyeniana Walp. (original description)
Baccharis rhetinodes Meyen & Walp. accepted as Baccharis neaei DC. (original description)
Baccharis tridentata var. integrifolia Walp. accepted as Baccharis alnifolia Meyen & Walp. (original description)
Bidens fruticulosa Meyen & Walp. accepted as Bidens andicola var. andicola (original description)
Bidens meyeniana Walp. accepted as Glossogyne tenuifolia (Labill.) Cass. ex Cass. (original description)
Blumea chinensis Walp. accepted as Blumea hieracifolia (D.Don) DC. (original description)
Chaetanthera debilis Meyen & Walp. accepted as Chaetanthera euphrasioides (DC.) F.Meigen (original description)
Conyza artemisiifolia Meyen & Walp. accepted as Laennecia artemisiifolia (Meyen & Walp.) G.L.Nesom (original description)
Conyza artemisioides Meyen & Walp. (original description)
Conyza obtusa var. humilis Walp. accepted as Conyza coronopifolia Kunth (original description)
Conyza syringifolia Meyen & Walp. accepted as Microglossa pyrifolia (Lam.) Kuntze (original description)
Culcitium glaciale Meyen & Walp. accepted as Senecio candollii Wedd. (original description)
Culcitium serratifolium Meyen & Walp. accepted as Senecio serratifolius (Meyen & Walp.) Cuatrec. (original description)
Eclipta erecta var. latifolia Willd. ex Walp. accepted as Eclipta prostrata (L.) L. (original description)
Erigeron spinulosus var. angustifolius Walp. accepted as Conyza spiculosa (Hook. & Arn.) Zardini (original description)
Eupatorium origanoides Meyen & Walp. accepted as Ophryosporus heptanthus (Sch.Bip. ex Wedd.) R.M.King & H.Rob. (original description)
Eupatorium stigmatosum Meyen & Walp. accepted as Chromolaena odorata (L.) R.M.King & H.Rob. (original description)
Flourensia besseriana Meyen & Walp. accepted as Flourensia thurifera (Molina) DC. accepted as Austroflourensia thurifera (Molina) J.C.Ospina & S.E.Freire (original description)
Franseria lessingii Meyen & Walp. accepted as Ambrosia chamissonis (Less.) Greene (original description)
Franseria tacorensis Meyen & Walp. accepted as Ambrosia artemisioides Meyen & Walp. ex Meyen & Walp. (original description)
Gnaphalium cymatoides var. glabrum Walp. accepted as Gnaphalium cymatoides Kunze ex DC. (original description)
Gnaphalium lacteum Meyen & Walp. (original description)
Gnaphalium luteoalbum var. glandulosum Walp. accepted as Laphangium luteoalbum (L.) Tzvelev (original description)
Gnaphalium psilophyllum Meyen & Walp. (original description)
Homoianthus inermis Meyen ex Walp. accepted as Perezia recurvata Less. (original description)
Leucheria meyeniana Walp. (original description)
Metaxanthus Walp. (original description)
Mikania variabilis Meyen & Walp. accepted as Mikania micrantha Kunth (original description)
Oreophila meyeniana Walp. accepted as Hypochaeris meyeniana (Walp.) Benth. & Hook.f. ex Griseb. (original description)
Oreophila taraxacifolia Meyen & Walp. accepted as Hypochaeris taraxacoides (Meyen & Walp.) Ball (original description)
Polyachyrus fuscus (Meyen) Walp. (original description)
Senecio adenophyllus Walp. (original description)
Senecio calcicola Meyen & Walp. accepted as Senecio calcensis Cabrera & Zardini (original description)
Senecio dryophyllus Meyen & Walp. (original description)
Senecio macrotus Kunze ex Walp. (original description)
Senecio rudbeckiifolius Meyen & Walp. (original description)
Senecio scorzonerifolius Meyen & Walp. (original description)
Sonchus brasiliensis Meyen & Walp. (original description)
Sonchus chuquitensis Meyen ex Walp. accepted as Sonchus congestus Willd. (original description)
Sonchus erythropappus Meyen & Walp. ex Meyen & Walp. (original description)
Tagetes silenoides Meyen & Walp. accepted as Tagetes filifolia Lag. (original description)
Vernonia eriosematoides Walp. accepted as Inula cappa (Buch.-Ham. ex D.Don) DC. (original description)
Vernonia gomphrena Walp. (original description)
Vernonia phyliciformis (Meyen) Walp. accepted as Parastrephia lucida (Meyen) Cabrera (original description)
Vernonia phyliciformis var. resinosa Walp. accepted as Parastrephia lucida (Meyen) Cabrera (original description)
Villanova titicacensis (Meyen & Walp.) Walp. (original description)
Wedelia titicacensis Meyen & Walp. accepted as Villanova titicacensis (Meyen & Walp.) Walp. (original description)
Werneria minima Walp. accepted as Werneria pygmaea Gillies ex Hook. & Arn. (original description)
Werneria minima var. pygmaea Walp. (original description)