Aster bullatus Klatt accepted as Symphyotrichum bullatum (Klatt) G.L.Nesom (original description)
Crepis heterophylla Klatt (original description)
Culcitium ferrugineum Klatt accepted as Senecio ferrugineus (Klatt) Cuatrec. (original description)
Culcitium peruvianum Klatt accepted as Senecio culciklattii Cuatrec. (original description)
Eupatorium abronium Klatt accepted as Ageratina prunellaefolia (Kunth) R.M.King & H.Rob. (original description)
Eupatorium constipatiflorum Klatt accepted as Bartlettina constipatiflora (Klatt) R.M.King & H.Rob. (original description)
Eupatorium didymum Klatt accepted as Ayapanopsis didyma (Klatt) R.M.King & H.Rob. (original description)
Eupatorium drepanophyllum Klatt accepted as Koanophyllon albicaulis (Sch.Bip. ex Klatt) R.M.King & H.Rob. (original description)
Eupatorium ecuadorae Klatt accepted as Heterocondylus vitalbae (DC.) R.M.King & H.Rob. (original description)
Eupatorium lobbii Klatt accepted as Dasycondylus lobbii (Klatt) R.M.King & H.Rob. (original description)
Eupatorium loxense Klatt accepted as Ageratina exserto-venosa (Klatt) R.M.King & H.Rob. accepted as Ageratina fastigiata (Kunth) R.M.King & H.Rob. (original description)
Eupatorium parasiticum Klatt accepted as Neomirandea parasitica (Klatt) R.M.King & H.Rob. (original description)
Eupatorium pellium Klatt accepted as Chromolaena pellia (Klatt) R.M.King & H.Rob. (original description)
Eupatorium phyllocephalum Klatt (original description)
Gynoxys psilophylla Klatt (original description)