Baccharis schiedeana Benth. (original description)
Bidens costaricensis Benth. ex Benth. accepted as Bidens ostruthioides (DC.) Sch.Bip. (original description)
Cacalia heterogama Benth. accepted as Roldana heterogama (Benth. ex Hemsl.) H.Rob. & Brettell (original description)
Cirsium platycephalum Benth. accepted as Cirsium subcoriaceum (Less.) Sch.Bip. ex Sch.Bip. (original description)
Coelestina tomentosa Benth. accepted as Ageratum tomentosum (Benth. ex Oersted) Hemsley (original description)
Coreopsis oerstediana Benth. accepted as Bidens oerstediana (Benth. ex Benth.) Sherff (original description)
Egletes glabrata Benth. (original description)
Egletes obovata Benth. (original description)
Eupatorium capillipes Benth. accepted as Fleischmannia capillipes (Benth. ex Oerst.) R.M.King & H.Rob. (original description)
Eupatorium ixiocladon Benth. (original description)
Eupatorium oerstedianum Benth. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob. (original description)
Eupatorium plectranthifolium Benth. (original description)
Eupatorium quinquesetum Benth. accepted as Fleischmannia arguta (Kunth) B.L.Rob. (original description)
Eupatorium sideritidis Benth. accepted as Fleischmannia sideritides (Benth. ex Benth.) R.M.King & H.Rob. (original description)
Eupatorium sinclairii Benth. accepted as Fleischmannia sinclairii (Benth. ex Oerst.) R.M.King & H.Rob. (original description)
Eupatorium subcordatum Benth. (original description)
Eupatorium vulcanicum Benth. accepted as Ageratina pichinchensis (Kunth) R.M.King & H.Rob. (original description)
Gnaphalium roseum var. angustifolium Benth. accepted as Pseudognaphalium roseum (Kunth) Anderb. (original description)
Gnaphalium roseum var. hololeucum Benth. accepted as Pseudognaphalium roseum (Kunth) Anderb. (original description)
Gnaphalium roseum var. sordescens Benth. accepted as Pseudognaphalium roseum (Kunth) Anderb. (original description)
Gymnopsis costaricensis Benth. accepted as Viguiera cordata (Hook. & Arn.) D'Arcy (original description)
Gynoxys cummingii Benth. accepted as Pseudogynoxys cummingii (Benth. ex Oerst.) H.Rob. & Cuatrec. (original description)
Gynoxys oerstedii Benth. accepted as Pseudogynoxys haenkei (DC.) Cabrera (original description)
Hieracium irasuense Benth. (original description)
Lycoseris grandis Benth. (original description)
Melanthera lanceolata Benth. (original description)
Montanoa hibiscifolia Benth. (original description)
Podachaenium paniculatum Benth. accepted as Podachaenium eminens (Lag.) Sch.Bip. ex Sch.Bip. (original description)
Senecio multivenius Benth. (original description)
Simsia grandiflora Benth. (original description)
Spilanthes parvifolia Benth. accepted as Acmella filipes (Greenm.) R.K.Jansen (original description)
Tithonia aristata Benth. (original description)
Vernonia acilepis Benth. accepted as Vernonia remotiflora Rich. accepted as Lepidaploa remotiflora (Rich.) H.Rob. (original description)
Vernonia brachiata Benth. accepted as Eirmocephala brachiata (Benth. ex Oerst.) H.Rob. (original description)
Vernonia bullata Benth. accepted as Vernonia canescens Kunth (original description)
Viguiera acuminata Benth. (original description)