Ageratum cordatum (S.F.Blake) L.O.Williams accepted as Blakeanthus cordatus (S.F.Blake) R.M.King & H.Rob. (original description)
Ageratum isocarphoides (DC.) L.O.Williams accepted as Ageratum isocarphoides (DC.) Hemsl. (original description)
Ageratum robinsonianum (L.O.Williams) L.O.Williams accepted as Ageratum rugosum Coulter ex J. D. Smith (original description)
Eupatorium magistri L.O.Williams accepted as Critonia billbergiana (Beurl.) R.M.King & H.Rob. (original description)
Eupatorium oreophilum L.O.Williams accepted as Neomirandea biflora R.M.King & H.Rob. (original description)
Eupatorium quercetorum L.O.Williams accepted as Chromolaena quercetorum (L.O.Williams) R.M.King & H.Rob. (original description)
Mikania stipulifera L.O.Williams (original description)