Chaptalia nutans (L.) Polák (original description)
Cnicus costaricensis Pol. accepted as Cirsium mexicanum DC. (original description)
Eupatorium angosturae Pol. accepted as Erechtites valerianifolius (Link ex Wolf) Less. ex DC. (original description)
Eupatorium braunii Pol. accepted as Baccharis pedunculata (Mill.) Cabrera (original description)
Eupatorium splendens Klotzsch ex Pol. accepted as Fleischmannia splendens R.M.King & H.Rob. (original description)
Tagetes macroglossa Pol. accepted as Tagetes tenuifolia Cav. (original description)
Zexmenia villosa Pol. accepted as Lasianthaea fruticosa var. villosa (Pol.) B.L.Turner (original description)